Rapid processing of net-shape thermoplastic planar random composite preforms (2009)
Jespersen, S. T., Baudry, F., Schmäh, D., D.Wakeman, M., Michaud, V., Blanchard, P., ...
A novel thermoplastic composite preforming and moulding process is investigated to target cost issues in textile composite processing associated with trim waste, and the limited mechanical properties...
Micromechanics and damping properties of composites integrating shear thickening fluids (2009)
Neagu, R. C., Månson, J.-A. E.
Damping is an important parameter for vibration control, noise reduction, fatigue endurance or impact resistance of composite materials. In this study, a micromechanical model was used to predict the...
Hybrid glass mat reinforced polypropylene-montmorillonite nanocomposites (2009)
Houphouet-Boigny, C., Plummer, C. J. G., Dalle Vacche, S., Michaud, V., Wakeman, M. D., Månson, J.-A. E.
Polypropylene/montmorillonite (iPP/MMT) has been investigated as an alternative to iPP as a matrix for glass mat thermoplastic (GMT) composites. The melt viscosity increased significantly on MMT...
Ultra-Light Asymmetric Photovoltaic Sandwich Structures (2009)
Rion, J., Leterrier, Y., Månson, J.-A. E.
This work evaluated the possibility of using silicon solar cells as load-carrying elements in composite sandwich structures. Such an ultra-light multifunctional structure is a new concept enabling...
Ruggerone, R., Plummer, C. J. G., Herrera, N. N., Bourgeat-Lami, E., Månson, J.-A. E.
Transmission electron microscopy (TEM) has been used to investigate the effect of laponite clay on microdeformation in thin latex-based polystyrene (PS) films, in which the laponite was concentrated...
Ramier, J., Costa, N. D., Plummer, C. J. G., Leterrier, Y., Månson, J.-A. E., Eckert, R., ...
The working electrode of a dye-sensitized photovoltaic fiber is constituted of a porous TiO2 coated titanium wire. The cohesion and adhesion of such a brittle oxide coating on the ductile metal...
Andersons, J., Modniks, J., Leterrier, Y., Tornare, G., Dumont, P., Månson, J.-A. E.
Crack onset strain measurements of a confined layer in tension provide the means for layer toughness estimation. The procedure can be simplified if steady-state conditions prevail starting from the...
Mechanical properties of SiOx gas barrier coatings on polyester films (2008)
Howells, D. G., Henry, B. M., Leterrier, Y., Månson, J.-A. E., Madocks, J., Assender, H. E.
This paper reports the impressive mechanical properties of 1 μm thick carbon-containing SiOx gas barrier coatings, characterised using the uniaxial fragmentation test. Such coatings have been found...
Cellular thermoplastic composites with microstructural gradients of fibres and porosity (2008)
Bühler, Manuel, Bourban, Pierre-Etienne, Månson, J.-A. E
New thermoplastic composites with their composition tailored at the yarn level were proposed and successfully prepared. A specific processing method was developed for composites exhibiting different...
Jespersen, S., Wakeman, M. D., Cramer, D., Michaud, V., Månson, J.-A. E.
An impregnation model has been developed to evaluate the infiltration phenomena that occur during a novel near net shape preforming method. This process comprises automated deposition of...
Schmidt, L. E., Yib, S., Jinb, Y. H., Leterrier, Y., Månson, J.-A. E.
Different photocurable acrylates, including two hyperbranched monomers, are compared with an epoxy negative-tone photoresist (SU-8) with respect to their suitability for the fabrication of...
De Oliveira, R., Lavanchy, S., Chatton, R., Constantini, D., Michaud, V., ...
The influence of the mould material on the build-up of internal stresses during autoclave cure of carbon fibre composites was investigated using embedded optical fibre Bragg gratings. Unidirectional...
Rion, J., Leterrier, Y., Månson, J.-A. E.
The formation of resin fillet between honeycomb core cell walls and skin in light sandwich structures was studied to gain a better understanding of the bonding process. A method was developed for...
Ternat, C., Ouali, L., Sommer, H., Fieber, W., Velazco, M. I., Plummer, C. J. G., ...
Amphiphilic multi-arm star block copolymers with a hydrophobic inner and a hydrophilic outer shell have been used to encapsulate hydrophobic volatile fragrances in aqueous media under realistic...
Embedded Shape-Memory Alloy Wires for Improved Performance of Self-Healing Polymers (2008)
Kirkby, E., Rule, J. D., Michaud, V., Sottos, N. R., White, S. R., Månson, J.-A. E.
We report the first measurements of self-healing polymers with embedded shape memory alloy (SMA) wires. The addition of SMA wires shows improvements of healed peak fracture loads by up to a factor of...
Ternat, C., Ouali, L., Sommer, H., Fieber, W., Velazco, M. I., Plummer, C. J. G., ...
Amphiphilic multiarm star-block copolymers with a hydrophobic inner and a hydrophilic outer shell have been used to encapsulate hydrophobic bioactive volatiles in aqueous media under realistic...
Cellular composites based on continuous fibres and bioresorbable polymers (2008)
Biocompatible composites, whose porosity and fibre fraction can be tailored over a large range and whose mechanical resistance is comparable to that of natural bone, were processed with poly(lactic...
Hybrid glass fiber-reinforced thermoplastic nanocomposites (2008)
Houphouet-Boigny, C., Plummer, C. J. G., Wakeman, M. D., Månson, J.-A. E.
The feasibility of integrating thermoplastic isotactic polypropylene/ montmorillonite nanocomposite matrices into conventional fiber-reinforced composites has been investigated. Two basic processing...
Transverse permeability of chopped fibre bundles with an elliptical cross-section (2007)
Merhi, D., Michaud, V., Kämpfer, L., Vuilliomenet, P., Månson, J.-A. E.
The out-of-plane permeability of 25 mm-long chopped glass fibre bundle beds was measured. These bundles, used in sheet moulding compound (SMC) composites, have an elliptical cross-section with the...
Bieder, A., Gondoin, V., Leterrier, Y., Tornare, G., V. Rohr, P. R., Månson, J.-A. E.
Cohesive and adhesive properties of silicon oxide barrier coatings deposited from an oxygen/hexamethyldisiloxane gas mixture by plasma enhanced chemical vapor deposition, with controlled...
Ultra-thin hybrid organic/inorganic gas barrier coatings on polymers (2007)
Singh, B., Bouchet, J., Rochat, G., Leterrier, Y., Månson, J.-A. E., Fayet, P.
The oxygen transmission rate of 48 nm thick SiO2 coatings on a poly(ethylene terephthalate) (PET) substrate was reduced by a factor of three after applying an 8 nm thick layer of oligomerized...
Dumont, P., Tornare, G., Leterrier, Y., Månson, J.-A. E.
Intrinsic, thermal, and hygroscopic contributions to the in-plane residual stress in silicon nitride films on polyimide substrates are identified, based on iso-hygric thermal ramps and isothermal...
Mechanical integrity analysis of multilayer insulator coatings on flexible steel substrates (2007)
Plojoux, J., Leterrier, Y., Månson, J.-A. E., Templier, F.
The cohesive and adhesive properties, and related critical radius of curvature of thin multilayer insulator coatings on a 152 μm thick flexible steel substrate were investigated using tensile...
Schmidt, L. E., Leterrier, Y., Schmaeh, D., Månson, J.-A. E., James, D., Gustavsson, E., ...
The photo-curing behavior of reactive blends of dipentaerythritol penta/hexaacrylate (DPHA) with an acrylated hyperbranched polyester and an acrylated hyperbranched polyether was investigated by...
Ternat, C., Kreutzer, G., Plummer, C. J.G., Nguyen, T. Q., Herrmann, A., Ouali, L., ...
Novel amphiphilic multi-arm star-block copolymers with a hyperbranched core, a hydrophobic inner shell, and a hydrophilic outer shell have been prepared from a commercial hyperbranched polyester...
Time-intensity transformation and internal stress in UV-curable hyperbranched acrylates (2007)
Schmidt, L. E., Schmaeh, D., Leterrier, Y., Månson, J.-A. E.
The photocuring of three different highly functional acrylates—Di-pentaerythritol penta/hexaacrylate (DPHA) and two hyperbranched molecules (HBP), one with a stiff polyester and one with a more...
Evaluation of interfacial stress transfer efficiency by coating fragmentation test (2007)
Andersons, J., Leterrier, Y., Tornare, G., Dumont, P., Månson, J.-A. E.
Probabilistic model of coating fragmentation under uniaxial tensile loading is developed. Analytical expressions of the crack spacing evolution are obtained for small-strain and large-strain...
Jansson, N., Wakeman, M. D., Månson, J.-A. E.
Using an integrated processing methodology, an injection or compression moulded thermoplastic structure can be locally reinforced, for example, with textile structures or uni-directional fibre tows....
Durability of aminosilane-silica hybrid gas-barrier coatings on polymers (2007)
Singh, B., Bouchet, J., Leterrier, Y., Månson, J.-A. E., Rochat, G., Fayet, P.
Aminosilane solutions with pH equal to 8 and to 11 were applied and cured on SiO2 coated poly(ethylene terephthalate) (PET) films. The permeability of the silane-silica hybrid coating on PET was...
Fischer, C., Overney, L.S., Fauve, M., Blanke, O., Rhyner, H. U., Herzog, M. H., ...
Flexural and torsional rigidity are important properties of skis. However, the flexural and torsional rigidity that lead to optimal performance remain to be established. In the present study, four...
Jin, Young-Hyun, Cho, Young-Ho, Schmidt, L. E., Leterrier, Y., Månson, J.-A. E.
A novel UV-curable low-stress hyperbranched polymer (HBP) micromolding process is presented for the fast and low-temperature fabrication of hydrophilic microfluidic devices. Process, material and...
Houphouet-Boigny, C., Plummer, C., Wakeman, M. D., Månson, J.-A. E.
The present work is aimed at assessing the feasibility of integrating thermoplastic polypropylene nanocomposite matrices into conventional fiber-reinforced composites based on hybrid textiles that...
Bouchet, J., Rochat, G., Leterrier, Y., Månson, J.-A. E., Fayet, P.
The aim of this study is to develop coatings on polymer substrates with a combined increase in oxygen barrier performance and toughness, based on SiOx coatings modified with multifunctional...
Low-Profile mechanisms in a PVAc/polyester blend (2006)
Bulliard, X., Michaud, V., Månson, J.-A. E.
The different steps associated with the curing of a PVAc/polyester blend are identified and correlated to the mechanism of shrinkage control in the presence of a low-profile additive (LPA)....
Clifford, S., Jansson, N., Ju, W., Michaud, V., Månson, J.-A. E.
A design tool able to predict the residual stress state and dimensional stability of large complex shaped composite parts has been developed. It is based on a finite element model, using a...
Lalande, L., Plummer, C. J. G., Månson, J.-A. E., Gérard, P.
The fracture behavior of composite rubber particle-toughened polymethylmethacrylate has been investigated over a wide range of test speeds, encompassing impact conditions. When the entanglement...
Mathieu, L. M., Mueller, T. L., Pioletti, D. P., Müller, R., Månson, J.-A. E.
Bone is a complex porous composite structure with specific characteristics such as viscoelasticity and anisotropy, both in morphology and mechanical properties. Bone defects are regularly filled with...
Dynamic capillary effects in liquid composite moulding with non-crimp fabrics (2006)
Verrey, J., Michaud, V., Månson, J.-A. E.
A technique is presented to measure the capillary pressure drop DPg during infiltration of non-crimp fabrics by a liquid matrix. Three types of liquids are used: polyethylene glycol (PEG) dissolved...
Manufacturing cost comparison of thermoplastic and thermoset RTM for an automotive floor pan (2006)
Wakeman, M. D., Verrey, J., Michaud, V., Månson, J.-A. E.
Two resin transfer moulding (RTM) processes have been examined for automotive body-in-white (BIW) structures. An epoxy system was compared with a novel reactive polyamide 12 (PA12) system via...
Wakeman, M. D., Zingraff, L., Månson, J.-A. E.
Two forms of carbon fibre reinforced polyamide 12 (PA12) were compared during non-isothermal stamp forming. The first was a stretch broken commingled yarn woven into a fabric, studied at three...
Pilati, F., Messori, M., Fabbri, P., Leterrier, Y., Singh, B., Månson, J.-A. E.
Organic–inorganic hybrid materials were prepared using the sol–gel process in order to improve the scratch resistance of poly(methyl methacrylate) (PMMA) substrates. Sol–gel solutions based on...
Jansson, N.E., Leterrier, Y., Medico, L., Månson, J.-A.E.
Determination of fracture parameters for brittle coatings with a sub-micron thickness is not a straightforward task. Since direct evaluation through testing with for instance a double cantilever beam...
Microdeformation mechanisms in rubber toughened PMMA and PMMA-based copolymers (2006)
Lalande, L., Plummer, J.G., Månson, J.-A. E., Gérard, P.
The classical method of toughening polymethylmethacrylate (PMMA) is to incorporate composite rubber particles into the homopolymer matrix. This approach has been extended in the present work by (i)...
Formation of aminosilane-oxide interphases (2006)
Bouchet, J., Pax, G. M., Leterrier, Y., Michaud, V., Månson, J.-A. E.
The aim of this work is to understand the interactions and interphase formation mechanisms between a liquid aminosilane oligomer (γ -APS) and glass, steel or gold surfaces as a function of the pH of...
Tailoring of the practical adhesion between polyethylene and galvanised steel (2006)
Pax, G. M., Bouchet, J., Michaud, V., Månson, J.-A.E.
Abstract—The practical adhesion of maleic anhydride grafted polyethylene (MAH-PE) to galvanised steel was studied using 3-point flexure tests, before and after hydrothermal ageing. Before bonding,...
Modeling of multiple cracking and decohesion of a thin film on a polymer substrate (2006)
Jansson, N.E., Leterrier, Y., Månson, J.-A.E.
Thin brittle films on polymer substrates are finding increasing use as gas barriers for example in the medical and food packaging industries and also for the next generation of ultra-light displays...
Reaction-Induced Phase Separation in Poly(vinyl acetate)/ Polyester Blend (2006)
Bulliard, X., Michaud, V., Månson, J.-A.E.
In blends of unsaturated polyester (UP), poly (vinyl acetate) (PVAc), and styrene, a reaction-induced phase separation occurs upon curing that is due to the crosslinking between styrene and the UP...
Mehri, D., Michaud, V., Comte, E., Månson, J.-A. E.
The effect of sizing on bending rigidity in fibre bundles was investigated. Particular attention was paid to the effect of film formers and anti-static agents on the behaviour of glass fibre bundles...
Dynamic properties of sandwich structures with integrated shear-thickening fluids (2006)
Fischer, C., Braun, S. A., Michaud, V., Plummer, C. J. G., Månson, J.-A. E.
The integration of shear-thickening fluids (STFs) into composite structures has been investigated with the aim of tuning part stiffness and damping capacity under dynamic deformation. Results from...
Processing of homogeneous ceramic/polymer blends for bioresorbable composites (2006)
Mathieu, L.M., Månson, J.-A. E.
Three methods to mix ceramic fillers, hydroxyapatite or β-tricalcium phosphate, with a polymer matrix, a poly l-lactic acid, are investigated as a first step prior to supercritical foaming to...
Void Formation And Transport During SMC Manufacturing: Effect Of The Glass Fibre Sizing (2006)
Comte, E., Merhi, D., Michaud, V., Månson, J.-A. E.
The present study investigates the origin of voids in sheet molding compounds (SMCs) sheets and their transport during the manufacturing steps. Paste mixing, impregnation, thickening, and molding...
Polylactic acid-phosphate glass composite foams as scaffolds for bone tissue engineering (2006)
Georgiou, G., Mathieu, L., Pioletti, D. P., Månson, J.-A. E., Knowles, C., ...
Phosphate glass (PG) of the composition 0.46(CaO)-0.04(Na 2O)-0.5(P2O5) was used as filler in poly-L-lactic acid (PLA) foams developed as degradable scaffolds for bone tissue engineering. The effect...
Balta, J. A., Bosia, F., Michaud, V., Dunkel, G., Botsis, J., Månson, J.-A. E.
This paper describes the production of an adaptive composite by embedding thin pre-strained shape memory alloy actuators into a Kevlar-epoxy host material. In order to combine the activation and...
Bulliard, X., Michaud, V., Berg, J. C., Månson, J.-A. E.
The evolution of morphology of reactive thermoplastic/unsaturated polyester blends at the surface of glass fibers is investigated during curing. The study focuses on two different types of...
Bulliard, X., Michaud, V., Ramrus, D. A., Berg, J. C., Månson, J.-A. E.
A study of the microstructure developing at the surface of glass fibers in a poly(vinyl acetate) (PVAc)/polyester blend is presented. Three different experimental methods are used: a technique based...
Voids are often present in composite materials and have, as may be expected, negative effects on the mechanical properties. As a consequence, it is regarded to be important to optimise manufacturing...
Finite element modelling and testing of an injection moulded generic tow reinforced structure (2005)
Jansson, N., Wakeman, M. D., Månson, J.-A. E.
The deformation and fracture behaviour of a generic injection moulded structure reinforced by a robotically placed commingled glass fibre/polypropylene UD-tow (uni-directional) was simulated by...
Bioresorbable composites prepared by supercritical fluid foaming (2005)
Mathieu, L. M., Montjovent, M. O., Pioletti, D. P., Månson, J.-A. E.
Bone is a natural composite construct, with a gradient structure going from a loose interconnected cellular core to an outer dense wall, thus minimizing bone weight while keeping a high mechanical...
Mehri, D., Comte, E., Michaud, V., Månson, J.-A. E.
The correlation between sizing formulation, bundle mechanical characteristics, and bundle-matrix static and dynamic interactions are investigated. Two glass-fiber sizing formulations are considered,...
Resin transfer moulding of anionically polymerized polyamide 12 (2005)
Michaud, V., Zingraff, L., Verrey, J., Månson, J.-A. E.
Liquid composite moulding of Lactam 12 monomer and activating system (APLC12) into satin weave carbon fabrics is investigated, with emphasis on minimising the void content in the final part. The main...
Plummer, C. J. G., Rodlert, M., Grünbauer, H. J. M., Månson, J.-A. E.
Cast polyurethane thermosets have been modified with randomly oriented exfoliated and intercalated montmorillonite clay usinghyperbranched polymers (HBP) as reactive additives to promote dispersion...
Rochat, G., Leterrier, Y., Fayet, P., Månson, J.-A. E.
The mechanical properties of ultrathin silicon oxide (SiOx ) coatings plasma-deposited on poly(ethylene terephthalate) (PET) films were investigated with particular attention paid to the effect of...
Stress controlled gas-barrier oxide coatings on semi-crystalline polymers (2005)
Rochat, G., Leterrier, Y., Fayet, P., Månson, J.-A. E.
Thin silicon oxide (SiOx) barrier coatings formed by plasma enhanced chemical vapor deposition on poly(ethylene terephthalate) (PET) substrates were subjected to post-deposition annealing treatments...
Photorheology of Fast UV Curing Multifunctional Acrylates (2005)
Schmidt, L. E., Leterrier, Y., Wilhelm, M., Månson, J.-A. E.
The fast photopolymerization of different multifunctionalacrylates was analyzed by means of photorheology.The materials studied included a penta/hexaacrylatemonomer and two different acrylated...
Verrey, J., Winkler, Y., Michaud, V., Månson, J.-A. E.
The present work aims to enhance the interlaminar toughness of carbon/epoxy composites produced by RTM by modifying the resin with hyperbranched polymers (HBPs). A HBP content of 7.5% in the resin...
Deconsolidation in glass mat thermoplastic composites : Analysis of the mechanisms (2005)
Wolfrath, J., Michaud, V., Månson, J.-A. E.
During reheating and post-processing of thermoplastic-based composites, deconsolidation is often observed: the volume fraction fibre decreases and the void content increases. In this article, the...
Graded glass mat reinforced polypropylene (2005)
Wolfrath, J., Michaud, V., Månson, J.-A. E.
In the impregnation process, when pressure is applied, the dry fiber preform is first compressed and then unloads as the matrix flows within the pores. It has been shown earlier that for glass...
Wolfrath, J., Michaud, V., Månson, J.-A. E.
The influence of the initial configuration of glass mat and polypropylene on the deconsolidation during post-processing of the resulting composite is investigated. Deconsolidation experiments of a...
Montjovent, M.O., Mathieu, L.M., Hinz, B., Applegate, L.L., ...
The aim of this investigation was to test the biocompatibility of three-dimensional bioresorbable foams made of poly(L-lactic acid) (PLA), alone or filled with hydroxyapatite (HA) or β-tricalcium...
Process-Induced Internal Stresses in Phenol-Formaldehyde Cellulose Composites (2004)
Doyle, M., Hagstrand, P. O., Månson, J.-A. E.
Phenol and melamine-formaldehyde (PF and MF) cellulose composites are being used extensively in the laminate industry. Despite their many advantages, flat panels produced from such materials have a...
Leterrier, Y., Medico, L., Demarco, F., Månson, J.-A. E., Betz, U., Escola, M. F., ...
The mechanical integrity of tin-doped indium oxide (ITO) thin films sputtered onto a high temperature aromatic polyester developed for flexible display applications was investigated by means of...
Rheological and physical properties of aliphatic hyperbranched polyesters (2004)
Luciani, A., Plummer, C. J. G., Nguyen, T., Garamszegi, L., Månson, J.-A. E.
The effects of the size (pseudo-generation number) and nature of end groups on physical and rheological properties were investigated for a series of hyperbranched polyesters based on an ethoxylated...
Lundquist, L., Arpin, G., Leterrier, Y., Berthold, F., Lindström, M., Månson, J.-A. E.
The potential of pulp fiberreinforced thermoplastics is currently not fully explored in composites. One of the main reasons is that pulp fibers are extracted for the use in papermaking and are thus...
Compression Behavior of Pulp Fibre Networks (2004)
Lundquist, L., Willi, F., Leterrier, Y., Månson, J.-A. E.
The forced compression behavior of random 3D and 2D pulp fiber networks is investigated. Existing theories are found to describe well the evolution of packing stress with fiber volume fraction for...
Microdeformation in heterogeneous polymers revealed by electron microscopy (2004)
Plummer, C. J. G., Beguelin, P., Grein, C., Gensler, R., Dupuits, L., Gaillard, C., ...
Recent investigations of the tensile fracture behaviour of representative glassy and semicrystalline impact-resistant polymers are reviewed, with emphasis on the microdeformation behaviour as...
Rochat, G., Leterrier, Y., Plummer, C. J. G., Månson, J.-A. E., Szoszkiewicz, R., Kulik, A. J., ...
The influence of the surface morphology of semicrystalline polyamide 12 PA12! on the adhesion of thin silicon oxide coatings is analyzed by means of uniaxial fragmentation tests and scanning...
Hyperbranched Polymer/Clay nanocomposites (2004)
Rodlert, M., Grünbauer, H., Plummer, C. J. G., Månson, J.-A. E.
Hyperbranched Polymer/Montmorillonite Clay Nanocomposites (2004)
Rodlert, M., Plummer, C. J. G., Garamszegi, L., Leterrier, Y., Grünbauer, H. J. M., Månson, J.-A. E.
Two to four pseudo-generation aliphatic hyperbranched polymers (HBPs) with OH end-groups have been solution processed with various types of montmorillonite (MMT) layered alumino-silicate clays, and...
Rheological behavior of hyperbranched polymer/montmorillonite clay nanocomposites (2004)
Rodlert, M., Plummer, C. J. G., Leterrier, Y., Månson, J.-A. E., Grünbauer, H. J. M.
The equilibrium rheological properties of a range of isotropic exfoliated and intercalated hyperbranched polymer (HBP)/montmorillonite (MMT) clay nanocomposites have been investigated using low...
Fiber Orientation in Multilayer Tubes Processed by a Conical Extruder (2004)
Sarioglu, A., Månson, J.-A. E.
A new extruder design has been developed for the coextrusion of two-layer annular sections. The extruder consists of a conical stator-rotor-stator assembly, which performs extrusion from each side of...
Teil, H., Page, S. A., Månson, J.-A. E., Michaud, V.
The curing reaction of an epoxy resin [diglycidyl ether of bisphenol A (DGEBA)] combined with a methyl-hexahydrophtalic anhydride (MHHPA) hardener and a benzyldimethylamine (BDMA) accelerator was...
Influence of Chemical Composition on the Rheological Behavior of Condensation Reaction Resins (2003)
Doyle, M., Hagstrand, P. O., Månson, J.-A. E., Svensson, L., Lundmark, S.
In this paper, the chemorheological and dynamic mechanical behavior of melamine-formaldehyde (MF) resins of four different formaldehyde/melamine (F/M) molar ratios (1.25, 1.5 1.75 and 2.00) are...
Garamszegi, L., Nyguyen, T. Q., Plummer, C. J. G., Månson, J.-A. E.
This paper examines the mechanisms by which a polymer is dispersed in a co-rotating twin-screw extruder. An experimental investigation of the morphological evolution has been carried out on a 45-mm...
Rheological Properties of Hyperbranched Polymer/Poly(ethylene Terephthalate) Reactive Blends (2003)
Kil, S. B., Augros, Y., Leterrier, Y., Månson, J.-A. E.
The rheological properties in solution, in shear and in uniaxial elongation of poly(ethylene terephthalate) (PET) reacted together with hyperbranched polymers (HBPs) were investigated. Two different...
Reaction injection pultrusion of PA12 composites: Process and modelling (2003)
The development of a reactive pultrusion process is presented by considering the advantages of an in situ polymerisation of thermoplastic lauryllactam monomers. The specifics of the reaction...
Novel Pulp Fibre Reinforced Thermoplastic Composites (2003)
Lundquist, L., Marque, B., Leterrier, Y., Månson, J.-A. E.
The reinforcement potential of pulp fibres is presently not fully explored in thermoplastic composites. One of the reasons is that currently used processing methods comprise several severe...
Non-Isothermal Fusion Bonding in Semicrystalline Thermoplastics (2003)
Plummer, C. J. G., Smith, G., Månson, J.-A. E.
The development of the interfacial bond strength as a function of bonding conditions has been investigated in two representative semicrystalline thermoplastics, isotactic polypropylene and polyamide...
Rochat, G., Delachaux, A., Leterrier, Y., Månson, J.-A. E., Fayet, P.
The influence of the surface morphology of semi-crystalline poly(ethylene terephthalate) (PET) and polyamide 12 (PA12) films on the adhesion and cohesion of thin oxide coatings is analysed, with...
Rochat, G., Leterrier, Y., Fayet, P., Månson, J.-A. E.
Uniaxial fragmentation tests were carried out in situ in a scanning electron microscope (SEM) on 10-nm-thick silicon oxide coatings deposited by plasma enhanced chemical vapor deposition on...
Durability of hybrid PECVD-based coatings on semicrystalline polymers (2003)
Rochat, G., Leterrier, Y., Garamszegi, L., Månson, J.-A. E., Fayet, P.
The present work analyses silicon oxide coated polyester films, with attention paid to the effect of substrate process additives on the coating defect population, and on the coated film mechanical...
Modeling and Analysis of Helicoidal Flow in a Conical Extruder (2003)
Sarioglu, A., Månson, J.-A. E.
The present paper discusses the uniqueflow behavior in a new type of extruder. The extruder design is based on a hollow conical assembly of static (stators) and rotating (rotor) parts. Extrusion is...
Rheological behaviour during UV-curing of a star-branched polyester (2002)
Claesson, H., Malström, E., Johansson, M., Hult, A., Doyle, M., Månson, J.-A. E.
Using a rheometer coupled with an UV-light generator, the viscoelastic behaviour during the fast cure of star-branched polyester is investigated. The 32 arm star polymers consist of a hyperbranched...
Eom, Y. S., Boogh, L., Michaud, V., Månson, J.-A. E.
The development of internal stress during cure of epoxy and hyperbranched polymer- modified epoxy resins was characterized, taking into account the evolving viscoelastic properties, the volumetric...
Fracture toughness of weft-knitted fabric composites (2002)
Falconnet, D., Pandita, S., Månson, J.-A. E., Verpoest, I.
The mode I inter-laminar fracture toughness of advanced knitted textile composites was investigated. Two complex weft-knitted glass fabrics were selected for the study: a triple rib knit and a Milano...
Bernet, N., Sunderland, P., Månson, J.-A. E.
The dimensional stability of V-shaped composite parts made from polyamide-12/carbon fibre (PA12/CF) commingled yarn has been studied. An anisotropic, thermoviscoelastic material model was implemented...
Initiation Mechanisms of an Anionic Ring Opening Polymerisation for Lactam 12 (2002)
A novel liquid system has been developed to initiate the anionic polymerization of lactam-12. This system, containing both an activator and a catalyst, has the primary advantage over previous systems...
Flow through a convergence : Part 2. Mixing of high viscosity ratio polymer blends (2002)
Meller, M., Luciani, A., Månson, J.-A. E.
Dispersive mixing of high viscosity ratio blends was studied in a converging flow using a capillary rheometer equipped with dies having different entry profiles. Three inhomogeneous bimodal...
Flow through a convergence : Part 1. Critical Conditions for Unstable Flow (2002)
Meller, M., Luciani, A., Sarioglu, A., Månson, J.-A. E.
The critical conditions leading to fracture in elongation and different types of flow instabilities were examined in uniaxial elongation and in a capillary rheometer equipped with dies having...
The influence of internal stresses on the microbond test 1 : Theoretical analysis (2002)
Leterrier, Y., Månson, J.-A. E.
The present work focuses on the interfacial mechanical behaviour of a model composite consisting of a solid droplet on a fibre, generally referred to as the microbond test. The interfacial adhesion...
The influence of internal stresses on the microbond test II : Physical aging and adhesion (2002)
Leterrier, Y., Månson, J.-A. E.
The present work investigated the effects of physical aging on interfacial adhesion and internal stresses using single-fibre model composites. First, the stress state of the interface and its...
Phase Separation and Gelation of Epoxy Resin/Hyperbranched Polymer Blends (2002)
Mezzenga, R., Luciani, A., Månson, J.-A. E.
The structural buildup during reticulation of thermoset systems containing reactive modifiers can strongly influence the final properties of such blends. This was studied by considering the...
Mezzenga, R., Page, S., Månson, J.-A. E.
The evolution of surface tension during polymerization of three amine-cured epoxy systems was investigated. Due to the chemical reaction of the epoxy groups with primary and secondary amines, the...
Hyperbranched Polymer Layered Silicate Nanocomposites (2002)
Plummer, C. J. G., Garamszegi, L., Leterrier, Y., Rodlert, M., Månson, J.-A. E.
Plummer, C. J. G., Garamszegi, L., Nguyen, T. Q., Rodlert, M., Månson, J.-A. E.
A series of trimethylsilyl end-functionalized aliphatic hyperbranched polymers has been used to template porosity in polymethylsilsesquioxane films prepared by heat treatment of a spin cast...
Rheological Characteristics of Hyperbranched Polyesters (2002)
Plummer, C. J. G., Luciani, A., Nguyen, T. Q., Garamszegi, L., Rodlert, M., Månson, J.-A. E.
When the effects of physical aging below Tg are erased, the rheological response of a series of aliphatic hyperbranched polyesters is Newtonian and the melt viscosity scales roughly linearly with Mw...
Progress on Composites with Embedded Shape Memory Alloy Wires (2002)
Schrooten, J., Michaud, V., Parthenios, J., Psarras, G. C., Galiotis, C., Gotthardt, R., ...
Squeeze flow of concentrated long fibre suspensions: experiments and model (2002)
Servais, C., Luciani, A., Månson, J.-A. E.
Experimental squeeze flow results show that the behaviour of concentrated short fibre suspensions and concentrated long fibre suspensions impregnated with polymer melts are qualitatively different....
Robotic tow placement for local reinforcement of glass mat thermoplastics (GMTs) (2002)
Wakeman, M. D., Bonjour, F., Månson, J.-A. E.
A process has been developed where multiple yarns of commingled glass and polypropylene are heated and placed to a desired geometry. The placed unidirectional (UD) tow is then encapsulated by...
Beyond a Cost Model: Opportunities for Implementation of New Composite Technologies (2002)
Weibel, N., Sunderland, P., Wakeman, M. D., Månson, J.-A. E., Vollmann, T. E.
Yuranova, T., Garamszegi, L., Månson, J.-A. E., Bensimon, M., Kiwi, J.
Structured silica woven fabrics have been derivatized with functional groups able to anchor by exchange of Fe3+-ions and TiO2 showing a stable performance during the visible light induced...
Embedded Shape Memory Alloys Confer Aerodynamic Profile Adaptivity (2001)
Balta, J. A., Simpson, J., Michaud, V., Månson, J.-A. E., Schrooten, J.
Material phenomena controlling rapid processing of thermoplastic composites (2001)
Bernet, N., Zanetto, J. E., Månson, J.-A. E.
Driven by the need for more cost-effective applications, researchers and design engineers of polymer composites are facing increasing demands for the development of faster and more...
Life Cycle Assessment of Biofibres Replacing Glass Fibres as Reinforcement in Plastics (2001)
Corbière-Nicollier, T., Laban, B. G., Lundquist, L., Leterrier, Y., Månson, J.-A. E., Jolliet, O.
This article aims to determine the environmental performance of China reed fibre used as a substitute for glass fibre as reinforcement in plastics and to identify key environmental parameters. A life...
A structure and property based process window for void free thermoset composites (2001)
Eom, Y., Boogh, L., Michaud, V., Månson, J.-A. E.
A process window providing guidelines to minimize internal stress levels and to prevent void formation during cure of thermoset composite materials is presented. A model taking into account the...
Eom, Y., Boogh, L., Michaud, V., Sunderland, P., Månson, J.-A. E.
During cure of epoxy resins, polymerization induces an increase in mechanical properties, which is accompanied by a volumetric shrinkage. When the resin is cured in a constrained mold to which it...
The morphology of hyperbranched polymer compatibilized polypropylene/polyamide 6 blends (2001)
Jannerfeldt, G., Boogh, L., Månson, J.-A. E.
The influence of hyperbranched polymer grafted polypropylene (PP-HBP) on the morphology of polypropylene (PP)/polyamide 6 (PA6) blends has been investigated. The final morphology was strongly...
Jannerfeldt, G., Törnqvist, R., Rambert, N., Boogh, L., Månson, J.-A. E.
The influence of matrix modification on the interfacial shear strength (IFSS) and the mechanical performance of polypropylene/glass fibre composites is investigated. Two different modifiers were...
Japon, S., Luciani, A., Nguyen, Q. T., Leterrier, Y., Månson, J.-A. E.
The use of a tetrafunctional epoxy-based additive to modify the molecular structure of poly(ethylene terephthalate) (PET) was investigated with the aim of producing PET foams by an extrusion process....
Biaxial fragmentation of thin silicon oxide coatings on polyethylene terephthalate (2001)
Leterrier, Y., Pellaton, D., Mendels, D., Glauser, R., Andersons, J., Månson, J.-A. E.
Crack patterns of 53 nm and 103 nm thick silicon oxide coatings on poly(ethylene terephthalate) films are analyzed under equibiaxial stress loading, by means of a bulging cell mounted under an...
Internal Stresses and Adhesion of Thin Silicon Oxide Coatings on Poly(ethylene terephthalate) (2001)
Leterrier, Y., Wyser, Y., Månson, J.-A. E.
The effect of internal stresses on the cohesion and adhesion of a thin silicon oxide (SiOx) oxygen-barrier coating, evaporated on a poly(ethylene terephthalate) (PET) film substrate was studied....
Time-temperature-transformation diagram for reactive processing of polyamide 12 (2001)
In order to describe the different events occurring during the anionic polymerization of polyamide 12 (PA12), a general concept of a time, temperature, and transformation (TTT) diagram was...
A Review of Dendritic Hyperbranched Polymer as Modifiers in Epoxy Composites (2001)
Mezzenga, R., Boogh, L., Månson, J.-A. E.
Dendritic hyperbranched polymers have been shown to be able to double the interlaminar fracture resistance of epoxy-based composites and to reduce the internal stress level by as much as 80% with...
Thermo-mechanical properties of hyperbranched polymer modified epoxies (2001)
Mezzenga, R., Månson, J.-A. E.
The thermo-mechanical properties of hyperbranched polymer-epoxy blends and their dependence on hyperbranched polymer shell chemistry were investigated. Hyperbranched polymers were shown to be able to...
Thermodynamic Evolution of Unsaturated Polyester-Styrene-Hyperbranched Polymers (2001)
Mezzenga, R., Pettersson, B., Månson, J.-A. E.
The free energy of mixing during cure has been modeled for different blends of linear unsaturated polyester, styrene and allyl ether functional hyperbranched polymers. The molecular weight of the...
Mezzenga, R., Plummer, C. J. G., Boogh, L., Månson, J.-A. E.
The influence of cure temperature, composition and chemical structure on the morphology resulting from chemically induced phase separation has been investigated for different epoxy functionalized...
Impregnation of compressible fiber mats with a thermoplastic resin, Part I: Theory (2001)
In many cases of composite processing by liquid matrix impregnation, the fiber reinforcement is compressed when it comes in contact with the liquid and then relaxes as the matrix flows within its...
Impregnation of compressible fiber mats with a thermoplastic resin, Part II: Experiments (2001)
Michaud, V., Törnqvist, R., Månson, J.-A. E.
transverse direction is investigated with application to the Glass Mat reinforced Thermoplastics (GMT) lamination process in a double belt press.Amodel proposed in Part I to simulate the kinetics of...
Characterization of epoxy resin surface energetics (2001)
Page, S. A., Berg, J. C., Månson, J.-A. E.
This study has characterized the energetics of both the liquid state and the solid state of two commercially available epoxy resins: a DGEBA- and a TGMDA-based epoxy system. The surface properties of...
Adaptive composites with embedded shape memory alloys (2001)
Parlinska, M., Clech, H., Balta, J. A., Michaud, V., Månson, J.-A. E., ...
Vibrational response of adaptive composites (2001)
Parlinska, M., Clech, H., Balta, J. A., Michaud, V., Månson, J.-A. E., ...
Phase separation in epoxy resin-reactive dendritic hyperbranched polymer blends (2001)
Plummer, C. J. G., Mezzenga, R., Boogh, L., Månson, J.-A. E.
Equilibrium phase diagrams in composition-conversion space have been calculated for stoichiometric blends of an epoxy resin with a diamine hardener and dendritic hyperbranched polymers, to which...
The crystallization kinetics of polyamide-12 (2001)
Plummer, C. J. G., Månson, J.-A. E.
The crystallization kinetics of polyamide-12 has been investigated using a combination of differential scanning calorimetry (DSC) and hot-stage optical microscopy. The DSC data for isothermal...
Warp-knit laminates for stampable sandwich preforms (2001)
Thermoforming of doubly-curved sandwich components will oer new design possibilities and cost-eective manufacturing routes. However, the occurrence of folds and wrinkles in face sheets is...
A model for the consolidation of warp-knitted reinforced laminates (2001)
Rozant, O., Michaud, V., Månson, J.-A. E.
A model for the consolidation of thermoplastic composites reinforced with a warpknitted fabric was developed. The evolution of void content during composite consolidation achieved via film stacking...
The packing stress of impregnated fiber mats (2001)
Servais, C., Michaud, V., Månson, J.-A. E.
The parameters affecting the packing stress of fiber mats for melt impregnation, resin transfer molding and compression molding are systematically investigated. An analytical equation based on local...
Non-isothermal fusion bonding of polypropylene (2001)
Smith, G. D., Plummer, C. J. G., Månson, J.-A. E.
The fusion bonding of neat polypropylene (PP) has been investigated under non-isothermal conditions with different initial adherend temperatures, and the results compared with results from bonds...
Sunderland, P., Yu, W., Månson, J.-A. E.
A numerical tool for predicting the evolution of internal and residual stresses during the processing of thermoplastic matrix composites has been developed. Based on a finite element formulation, the...
Törnqvist, R., Servais, C., Månson, J.-A. E.
The non-isothermal flow during compression molding of thermoplastic-based composites having a planar, randomly oriented fiber structure has been investigated. Local interactions at the bundle-bundle...
Analysis of failure mechanisms in platelet-reinforced composites (2001)
Wyser, Y., Leterrier, Y., Månson, J.-A. E.
The short-term mechanical strength of platelet-reinforced polymer composites was modeled using classical two-dimensional stress-transfer analysis. The stress field in the platelet and at the...
Fusion bonding of polyamide 12 (2001)
Plummer, C. J. G., Månson, J.-A. E.
The strength of fusion bonds between polyamide 12 plaques has been investigated as a function of processing conditions, using the double cantilever beam geometry to measure the mode I critical strain...
Eom, Y. S., Boogh, L., Michaud, V., Sunderland, P., Månson, J.-A. E.
The relative sequence of shrinkage and evolution of modulus of a thermoset resin during cure leads to the build-up of internal stresses, especially if the resin is constrained by the presence of...
Han, H. Z. Y., Lee, S. S., Månson, J.-A. E., Hilborn, J. G.
A method to obtain quantitative information about the chemical composition spatial distribution on rough (Ra between half a micrometer and tens of micrometers) surfaces is developed by using a Raman...
Tailored interfacial properties for immiscible polymers by hyperbranched polymers (2000)
Jannerfeldt, G., Boogh, L., Månson, J.-A. E.
The influence of hyperbranched polymer grafted polypropylene (PP-HBP) on the interfacial adhesion between fusion bonded bilayers of polypropylene (PP) and polyamide 6 (PA6) and on the properties of...
Recycling of poly(ethylene terephthalate) into closed-cell foams (2000)
Japon, S., Leterrier, Y., Månson, J.-A. E.
The increase of the elongational viscosity of recycled poly(ethylene terephthalate) (PET) is investigated with the aim of producing closed-cell foams by means of a cost-effective reactive extrusion...
A rheological characterisation technique for fast UV-curable systems (2000)
Lee, S. S., Luciani, A., Månson, J.-A. E.
Using a rheometer coupled with a UV-light generator, a photo-rheometry set-up has been developed to study the viscoelastic properties of UV-coating systems during fast curing. Due to a high reaction...
Surface pattern formation in UV-curable coatings (2000)
Luciani, A., Plummer, C. J. G., Gensler, R., Månson, J.-A. E.
Evaluation of solubility parameters during polymerisation of amine-cured epoxy resins (2000)
Mezzenga, R., Boogh, L., Månson, J.-A. E.
A new procedure for the calculation of solubility parameter evolution during polymerisation has been developed for amine-cured epoxy systems, which allows quantitative thermodynamic modelling of...
A thermodynamic model for thermoset polymer blends with reactive modifiers (2000)
Mezzenga, R., Boogh, L., Månson, J.-A. E.
A new quantitative thermodynamic model for the prediction of phase equilibrium behaviour of thermoset-reactive modifier polymer blends has been developed. The model combines the FloryHuggins...
Surface energetics evolution during processing of epoxy resins (2000)
Page, S., Mezzenga, R., Boogh, L., Berg, J. C., Månson, J.-A. E.
Drapability of dry textile fabrics for stampable thermoplastic preforms (2000)
Sandwiches based on stampable foam core and face sheets offer potential for cost-effective applications. Since the formability of such sandwich structures mainly depends on the drapability of the...
Non-isothermal process rheology of thermoplastic composites for compression flow moulding (2000)
Törnqvist, R., Sunderland, P., Månson, J.-A. E.
The non-isothermal flow rheology of a glass mat reinforced polypropylene composite for compression flow moulding has been investigated experimentally and numerically. The influence of the processing...
Törnqvist, R., Sunderland, P., Månson, J.-A. E.
The influence of the fiber mat structure and the matrix rheology on the squeeze flow behavior of thermoplastic composites for compression flow molding has been investigated. An analytical model for...
Wyser, Y., Leterrier, Y., Månson, J.-A. E.
Extending the useful life of materials through recycling has proven to be an efficient means of reducing natural resource use and limiting the production of waste. In the case of polymer-based...
An analysis of disorder in thin silicon oxide coatings (1999)
Handge, U. A., Leterrier, Y., Månson, J.-A. E., Sokolov, I. M., Blumen, A.
Fiber-fiber interaction in concentrated suspensions : Dispersed fiber bundles (1999)
Servais, C., Luciani, A., Månson, J.-A. E.
A hypothesis for fiberfiber interaction in planar randomly oriented concentrated fiber suspensions is proposed and tested. The idea is that at sufficiently high fiber concentrations, friction and...
Fiber-fiber interaction in concentrated suspensions : Disperse fibers (1999)
A hypothesis for fiberfiber interaction in planar randomly oriented concentrated fiber suspensions is proposed and tested. The idea is that at sufficiently high fiber concentrations, friction and...
Measurement of process-induced residual stresses in linerboard (1999)
Sunderland, P., Sollander, A., Månson, J.-A. E., Carlsson, L. A.
Fusion bonding of maleic anhydride grafted polypropylene-polyamide 6 blends to polymamide 6 (1998)
Bidaux, J. E., Smith, G. D., Månson, J.-A. E., Plummer, J. G., Hilborn, J.
Macroporous epoxy networks via chemically induced phase separation (1996)
Kiefer, J., Hilborn, J. G., Månson, J.-A. E., Leterrier, Y., Hedrick, J. L.
Adhesion study of SiOx/PET films: comparison between scratch test and fragmentation test (1996)
Pitton, Y., Hamm, S. D., Mathieu, H. J., Leterrier, Y., Månson, J.-A. E.
Structure and properties of a stampable thermoplastic composite (1991)
Davies, P., Månson, J.-A. E., Roulin, M., Kausch, H. H., Echalier, B., Jacquemet, R.
Nelson, K. M., Prime, R. B., Månson, J.-A. E., Seferis, J. C.
An experimental technique of combined thermogravimetric analysis (TGA)-mass spectrometry (MS) was used to study the pyrolysis process during binder removal from a ceramic/binder system. The effect of...
Prediction of process-induced residual stresses in thermoplastic composites (1990)
Chapman, T. J., Gillespie, J. W., Pipes, R. B., Månson, J.-A. E., Seferis, J. C.
Compression thermal analysis of the consolidation process for thermoplastic matrix composites (1990)
Pre- and Post-Transition Behavior of Shear Thickening Fluids in oscillating Shear
Fischer, C., Michaud, V., Plummer, C. J. G., Månson, J.-A. E.
The dynamic shear-thickening behavior of concentrated colloidal suspensions of fumed silica in polypropylene glycol has been investigated. Dynamic frequency sweeps showed that, for any given solids...
Electro-Fragmentation Analysis of Dielectric Thin Films on Flexible Polymer Substrates
Pinyol, A., Meylan, B., Gilliéron, D., Leterrier, Y., Månson, J.-A. E.
A novel electro-fragmentation method was developed as a fast alternative to the time consuming fragmentation test carried out in situ in a microscope, to investigate the failure of dielectric...
Influence of process pressure on local facesheet instability for ultralight sandwich structures
Rion, J., Stutz, S., Leterrier, Y., Månson, J.-A. E.
The skin wrinkling phenomenon was investigated in the case of ultra-light sandwich structures with a honeycomb core manufactured by one-shot vacuum bag processing. The interplay between process...
Consolidation of net-shape random fiber thermoplastic composite preforms
Jespersen, S. T., Baudry, F., Wakeman, M. D., Michaud, V., Blanchard, P., Norris, R., ...