Carbon fibre reinforced composites are known for their high specific strength-to-weight ratio and are of great interest to the aerospace industry. Incorporating these materials into the fuselage, like in Boeing's 787 "Dreamliner", offers considerable weight reduction which increases flying efficiency, and reduces the cost of flying. In flight, aircraft are often subject to lightning strikes which, in the case of composites, can result in localized melting given the high resistive nature of the material. Aerospace carbon fibre composites often incorporate a metallic mesh or foil within the composite layers to dissipate the electrical charge through the large aircraft. The damage to the aircraft is minimized but not always eliminated. This research aims to elaborate a practical technique to deposit thin layers of conductive material on the surface of aerospace grade composites. Using Cold Gas Dynamic Spray (CGDS), such coatings could be used to repair damaged components. An experimental research approach was used to develop metallic coated composites. Using the CGDS equipment of Centerline (SST-P), specific parameters (such as gas temperature and stagnation pressure) were determined for each type of metallic coating (tin-based & copper-based). The use of bond coats was explored in order to attain the desired coatings. Once optimized, these coatings were evaluated with respect to their corrosive, adhesive, and electrical properties following industry standards.

Parmi les nouvelles technologies pour l’énergie inscrites dans un contexte de développement durable, les piles à combustible à membrane échangeuse de protons (PEMFC) présentent des aspects séduisants. Toutefois, pour rendre cette technologie compatible avec une application à grande échelle, elle doit répondre à des exigences strictes en termes de coût, performance, et durabilité. Alors que les plaques bipolaires métalliques sont pénalisées par leur résistance à la corrosion et celles en graphite par leurs propriétés mécaniques et leur coût (dû aux phases d’usinage des canaux), les plaques bipolaires composites apparaissent attrayantes en raison de leurs propriétés et performances et de leur coût. Cette thèse s’inscrit dans ce cadre, en proposant un matériau composite à matrice organique de type époxy et charges conductrices de graphite. L’objectif de notre étude consiste à mettre au point un matériau thermodurcissable à base d’une formulation époxyde solide (permettant de contrôler sa chimie et plus particulièrement sa réactivité) fortement chargée en graphite. Deux formulations différentes sont étudiées. La première est à base de prépolymère époxy appelé DGEBA et de dicyandiamide (DDA) comme durcisseur. L’autre formulation étudiée est constituée de DGEBA et de durcisseur : le 3,3’,4,4’-benzophénone dianhydride tétracarboxylique (BTDA). Ces deux formulations ont la particularité d’être très réactives à haute température (180-200°C) caractérisées par des temps de gel très courts (plus petit que 1min) afin d’avoir un temps de cycle de réticulation court pour une industrialisation de la fabrication. De plus, ces mêmes matrices ont montré une bonne stabilité chimique à température ambiante ainsi qu’une bonne stabilité thermique du système réticulé compatible avec la température d’utilisation des piles en fonctionnement. Concernant les réseaux composites résultant de la polymérisation DGEBA/BTDA et DGEBA/DDA, le module au plateau caoutchoutique est dominé par le taux de charge qui est très élevé (85%), celui-ci est ainsi très proche d’un réseau à l’autre et reste supérieur à 1 GPa. Nous constatons une viscosité relativement élevée pour les systèmes fortement chargés, point à prendre en compte lors du procédé de transformation. Enfin, la dernière partie des travaux réalisés concerne l’étude de mélange constitué de la matrice thermodurcissable (DGEBA/DDA/urée) modifiée par un thermoplastique (PEI). L’originalité et l’intérêt de ce travail résident dans l’incorporation de charges conductrices afin que celles-ci puissent se disperser dans la phase continue ou co-continue époxyde-amine lors de la séparation de phase pour limiter la proportion de charges et ainsi la viscosité des systèmes chargés. L’autre intérêt est d’améliorer les propriétés de résistance à la rupture du réseau époxyde TD final grâce à la présence de la phase thermoplastique séparée. / Among the new technologies for energy for sustainable development, PEM fuel cells offer seducing aspects. However, in order to make this technology fit large scale application requirements, it has to comply with stringent cost, performance, and durability criteria. While metal bipolar plates are penalized by their corrosion resistance and those based on graphite by their mechanical properties and cost (due to machining phases of the channels), the composite bipolar plates appear attractive because of their properties, performance and their cost. In such a frame, the goal of this PhD was to propose a composite material based on an epoxy matrix and graphite conductive fillers.The aim of our study was to develop a thermosetting material based on a solid epoxy formulation (to control its chemistry and in particular its reactivity) highly filled with graphite. Two different formulations were studied. The first was based on the epoxy prepolymer DGEBA and dicyandiamine (DDA) as a hardener. The other formulation studied was composed of DGEBA and curing agent: 3,3’,4,4’ benzophenone tetracarboxylic dianhydride (BTDA). Both formulations have the particularity to be very reactive at high temperature (180-200 °C) characterized by very short gel time (less than 1min) to have a short curing cycle for the industrialization of the production. In addition, these matrixes have shown good chemical stability at room temperature and good thermal stability of cross-linked system compatible with the operating temperature of the fuel cell. On composite network resulting from the polymerization DGEBA / BTDA and DGEBA / DDA, the rubbery modulus appears to be dominated by the loading rate, very high (85%), and is above 1 GPa. We see a high viscosity for highly filled systems, point to consider during the process of transformation. The final part of the work concerned the study of blend of the thermosetting matrix (DGEBA / DDA / urea) modified with a thermoplastic (PEI). The originality and interest of this work is the incorporation of conductive fillers so that they can be dispersed in the continuous or co-continuous structure during the phase separation to limit the proportion of charges and and the viscosity of filled systems. The other interest is to improve the properties of tensile strength of the thermosetting epoxy network with the presence of the thermoplastic phase.

A travers cette thèse, nous avons pu valoriser les rejets agricoles du palmier dattier (Phoenix L. dactylifera) (fibres issues des folioles) par leur introduction comme renfort fibreux dans la préparation des biocomposites à matrice polyépoxyde (DGEBA/IPD). Le but de la première partie de la thèse était l’étude de la modification chimique des fibres de palmier par oxydation au 2,2, 6,6–tétraméthylpipéridine-1-oxyle (TEMPO). Le suivi cinétique et la topologie de la réaction, ainsi que la caractérisation des fibres à l’état brut et à l’état oxydé, ont été aussi étudiés. Un modèle cinétique original a été proposé ensuite rendant compte du caractère hétérogène de cette réaction chimique. La deuxième partie était consacrée à l’étude cinétique et rhéocinétique de la polymérisation du système DGEBA/IPD seul et en présence de fibres brutes et oxydées. Parallèlement, l’étude thermique de la polymérisation du réseau final a été également réalisée. La dernière partie avait comme but l’étude des propriétés mécaniques aux petites et grandes déformations de ces composites et mettre en évidence l’effet de l’oxydation des fibres sur ces propriétés. D’autre part, le suivi de mise en forme par RTM (moulage par transfert de résine) a montré un effet positif de l’oxydation sur le déroulement de l’injection. Une meilleure mouillabilité du mat des fibres oxydées par la résine est à l’origine de l’amélioration du procédé. / To increase in value the agricultural waste products of the date palm tree -phoenix dactylifera l-, especially the fibers from the leaflets, their use as filler in polyepoxide matrix (dgeba / ipd) was investigated to prepare new bio-based composites. Our goal in the first part is to study the chemical modification of palm fiber by oxidation mediated by 2,2,6,6-tetramethylpiperidine-1-oxyl (tempo). The kinetic and the topology of the reaction, as well as the characterization of fibres in rough and oxidized state, were also studied. An original kinetic model was proposed taking into account the heterogeneous character of this chemical reaction. The second part was devoted to study the kinetics and rheokinetic of the polymerization of dgeba / ipd with and without modified and unmodified fibers. This enabled to show the effect of the introduction of the date palm tree fibers (oxidized and non oxidized) on the composite formation. The thermal properties of the prepared composites were also investigated in this part of work. In the last part of this work, the mechanical properties of these composites were investigated and enabled to highlight the effect of the fibers oxidation on these properties. In addition, the effect of oxidation on the course of the injection during the rtm process (moulding by transfer of resin) was investigated. A positive effect of the oxidation of the fibers on the course of the injection was obtained and was attributed to the higher wettability of oxidized fibres by the resin.

O interesse na utilização de fibras naturais com matrizes poliméricas para a preparação de compósitos espalhou-se rapidamente ao longo dos últimos anos. No entanto, a adesão interfacial entre a fibra e a matriz tem ainda de ser aperfeiçoada. Para melhorar a adesão entre os constituintes e, consequentemente as propriedades mecânicas e térmicas dos materiais, duas abordagens foram investigadas: a irradiação por feixe de elétrons e a mercerização. Este trabalho descreve a fabricação e caracterização de biocompósitos de polietileno de alta densidade e fibra do ouriço da castanha do Brasil que foram preparadas por duas metodologias diferentes: a primeira foi irradiar o compósito com 150 kGy e a segunda foi irradiar a matriz com 15 kGy e então produzir o compósito. Para ambas as metodologias foram utilizadas fibras naturais mercerizadas e não mercerizadas. O efeito dos tratamentos estudados para melhorar a adesão entre a fibra e a matriz polimérica foi avaliado através de caracterizações mecânica, química, térmica e morfológica. Com base neste estudo, observou-se que a fibra do ouriço da castanha do Brasil é um material tecnicamente viável para uso como reforço em compósitos poliméricos. Observou-se que o processo de irradiação da matriz seguida da produção dos compósitos é um método eficaz para melhorar as propriedades térmicas e mecânicas dos compósitos biopoliméricos e que, quando comparado com o processo de mercerização, esse método pode ser considerado mais ambientalmente correto (sem produtos químicos e sem geração de resíduo), mais barato e mais simples. / The interest in the use of natural fibres with polymeric matrix for the preparation of composite spread rapidly over the last years. However, the interfacial adhesion between the fiber and the matrix has to be improved. To improve the adhesion between the constituents and consequently the mechanical and thermal properties of materials, two approaches were investigated: electron beam irradiation and mercerization. This paper describes the fabrication and characterization of biocomposites compounds with high density polyethylene and fibre from Brazil nut pod that were prepared by two different methods: the first irradiating the composite with 150 kGy and the second was radiating matrix with 15 kGy and then produce the composite. For both methodologies, natural fibers, mercerized and non-mercerized were used. The effect of the treatments to improve adhesion between the fiber and the polymer matrix was evaluated through mechanical, chemical, thermal and morphology charcterization. Based on this study, it was observed that fibre from Brazil nut pod is a technically viable material for use as reinforcement in polymer composites. It was observed that the process of matrix irradiation followed by the composite fabrication is an effective method for improving the thermal and mechanical properties of the composites, when compared with mercerization process, this method can be considered more environmentally friendly (no chemicals, and without generating waste), cheaper and simpler.

Ce travail de thèse porte sur la caractérisation d’un matériau composite polyacide lactique-bioverre pour application comme dispositif de réparation osseuse. Le bioverre étant trop fragile pour être utilisé seul comme dispositif de réparation osseuse, celui-ci est associé à une matrice polymère résorbable permettant d’apporter le caractère bioactif à des matériaux pouvant être mis en forme par des procédés de plasturgie. Le matériau composite polyacide lactique-bioverre est ainsi mis en forme par injection à partir de granules élaborés par voie solvant. La caractérisation des propriétés de ce matériau composite a révélé une augmentation du module élastique avec l’ajout de charges, mais une diminution des contraintes maximales admissibles et de la déformation à la rupture. Les modifications des propriétés mécaniques ont été associées à une modification des propriétés de la matrice et notamment de sa masse moléculaire. Un autre mode d’élaboration par pressage à chaud a permis de limiter la dégradation du polymère. Une meilleure maitrise de la masse moléculaire du composite serait ainsi un moyen de contrôler sa cinétique de dégradation in vivo et ainsi d’adapter ses propriétés en fonction du cahier des charges des applications visées. Dans une seconde partie, l’effet du taux de bioverre sur le caractère bioactif du composite a été évalué par immersion dans un fluide biologique de composites chargés à 20, 30 et 50% (en masse de bioverre). Un scénario de cristallisation à la surface des différents composites a ainsi été proposé. Tous les composites se sont révélés bioactifs et d’autant plus que le taux de bioverre est élevé. Le composite chargé à 50% apparait ainsi comme le matériau le plus bioactif, mais sa vitesse de dégradation est très rapide. Ce matériau étant destiné à être implanté, une étude de biocompatibilité in vitro a été menée par culture de cellules ostéoblastiques à la surface des matériaux. Enfin la biocompatibilité du composite in vivo, son caractère biorésorbable et ostéoconducteur ont été évalués par implantation du matériau composite dans les tissus musculaires et osseux de lapins. Le caractère biocompatible, bioactif et ostéoconducteur du composite chargé à 30% en masse de bioverre en fait un candidat de choix pour les applications proposées. / The aim of this work was to evaluate polylactic acid- Bioglass® composites for bone repair applications. Bioglass being too brittle to be used alone for load bearing applications, our strategy was to incorporate bioactive Bioglass® particles into a bioresorbable polymer matrix processed by conventional manufacturing techniques. The composite were processed by injection moulding from granules prepared by a solvent route. The composites exhibit higher Young modulus but lower strength and strain to failure than polymer alone. This is attributed to a decrease of molecular weight of the polymer matrix during the different steps of the process. Another processing method (hot pressing) was used to limit the drop in molecular weight of the polymer matrix: it leads to higher mechanical properties. Therefore, a careful control of the Polymer degradation may insure better mechanical properties and a better control of the degradation rate in vivo. The bioactivity of composites with 20, 30, 50 Wt. % of Bioglass® was a assessed by immersion in simulated body fluid. All the composites are bioactive, and all the more since the Bioglass® content is large. On the other side, the degradation of composites with a Bioglass® content of 50 wt. % is very rapid. Biological evaluation was conducted in vitro and in vivo. Osteoblast cell cultures and in vivo evaluation in rabbits demonstrate that polylactic acid - Bioglass® composites are biocompatible and osteoconductive. Such composites may therefore be a good option for bone repair applications in the future.

Non-destructive testing has become necessary to ensure the quality of materials and components either in-service or at the production stage. This requires the use of a rapid, robust and reliable testing technique. As a main testing technique, the ultrasound technology has unique abilities to assess the discontinuity location, size and shape. Such information play a vital role in the acceptance criteria which are based on safety and quality requirements of manufactured components. Consequently, an extensive usage of the ultrasound technique is perceived especially in the inspection of large scale composites manufactured in the aerospace industry. Significant technical advances have contributed into optimizing the ultrasound acquisition techniques such as the sampling phased array technique. However, acquisition systems need to be complemented with an automated data analysis procedure to avoid the time consuming manual interpretation of all produced data. Such a complement would accelerate the inspection process and improve its reliability. The objective of this thesis is to propose an analysis chain dedicated to automatically process the 3D ultrasound volumes obtained using the sampling phased array technique. First, a detailed study of the speckle noise affecting the ultrasound data was conducted, as speckle reduces the quality of ultrasound data. Afterward, an analysis chain was developed, composed of a segmentation procedure followed by a classification procedure. The proposed segmentation methodology is adapted for ultrasound 3D data and has the objective to detect all potential defects inside the input volume. While the detection of defects is vital, one main difficulty is the high amount of false alarms which are detected by the segmentation procedure. The correct distinction of false alarms is necessary to reduce the rejection ratio of safe parts. This has to be done without risking missing true defects. Therefore, there is a need for a powerful classifier which can efficiently distinguish true defects from false alarms. This is achieved using a specific classification approach based on data fusion theory. The chain was tested on several ultrasound volumetric measures of Carbon Fiber Reinforced Polymers components. Experimental results of the chain revealed high accuracy, reliability in detecting, characterizing and classifying defects.

Carbon nanotubes (CNT) and graphene have been one of the noticeable research areas in science and technology. In recent years, the assembly of these carbon nanostructures is one of the most interesting topic to the scientific world due to its variety of applications from nano to macroscale. These bulk nanostructures to be applicable in shock absorbers, batteries, sensors, photodetectors, actuators, solar cells, fuel cells etc. The present work is motivated to study the detailed compressive behavior of three dimensional cellular assemblies of CNT and graphene. The CNT foams are synthesized by chemical vapor deposition method. It is interesting to study the compressive behavior of CNT foam in the presence external magnetic field applied perpendicular to CNT axis. The peak stress and energy absorption capability of CNT foam enhances by four and nearly two times in the presence of magnetic field as compared to the absence of the magnetic field. In the absence of magnetic field the deformation of CNT foam is obtained elastic, plateau and densification regions. Further CNT foam is loaded with iron oxide nanoparticles of diameter is ~ 40nm on the surface and detailed study of the compressive behavior of the foam by varying iron nanoparticles concentration. The peak stress and energy absorption capability of CNT foam initially decreases with increasing the intensity of the magnetic field, further increases the intensity of the magnetic field the maximum stress and energy absorption capability increases which is due to magnetic CNT and particles align in the direction of the magnetic field. CNT surfaces were further modified by fluid of different viscosities. The mechanical behavior of CNT foam filled with fluids of varying viscosities like 100%, 95% and 90% glycerol and silicone oil are 612, 237, 109 and 279 mPa-s respectively. The mechanical behavior of CNT foam depends on both the intensity of magnetic field and fluid viscosity. The non linear relation between peak stress of CNT and magnetic field intensity is σp(B, η) = σ0 ± α(B-B0) where σ0 is the peak stress at B = B0 , η is the fluid viscosity, parameter α depends on properties of the MR fluid and B0 is an optimum magnetic field for which peak stress is maximum or minimum depending on the fluid viscosity. Graphene is assembled into a three dimensional structure called graphene foam. The graphene foam is infiltrated with polymer and study the detailed compressive behavior of graphene foam and graphene foam/PDMS at different strains of 20, 40, 60 and 70%. The maximum stress and energy absorption capability of graphene foam/PDMS is six times higher than the graphene foam. Also the graphene foam/PDMS is highly stable and reversible for 100 cycles at strains of 30 and 50%. The mechanical behavior of CNT, graphene foam, CNT/PDMS and graphene foam/PDMS is compared. Among all the foams, graphene foam/PDMS has shown the highest elastic modulus as compared to other foams. This behavior can be attributed to the wrinkles formation during the growth of graphene and a coupling between PDMS and interfacial interactions of graphene foam. Therefore it suggests potential applications for dampers, cushions and electronic packaging. Furthermore, the interaction between nanoparticles and polymer in a novel architecture composed of PDMS and iron oxide nanoparticles is studied. The load bearing capacity of uniform composites enhanced by addition of nanoparticles, reaching to a maximum to 1.5 times of the PDMS upon addition of 5wt.% of nanoparticles, and then gradually decreased to 1/6th of PDMS upon addition of 20wt.% of nanoparticles. On the other hand, the load bearing capacity of architectured composites at high strains (≥40%) monotonically increased with addition of nanoparticles in the pillars.

O interesse na utilização de fibras naturais com matrizes poliméricas para a preparação de compósitos espalhou-se rapidamente ao longo dos últimos anos. No entanto, a adesão interfacial entre a fibra e a matriz tem ainda de ser aperfeiçoada. Para melhorar a adesão entre os constituintes e, consequentemente as propriedades mecânicas e térmicas dos materiais, duas abordagens foram investigadas: a irradiação por feixe de elétrons e a mercerização. Este trabalho descreve a fabricação e caracterização de biocompósitos de polietileno de alta densidade e fibra do ouriço da castanha do Brasil que foram preparadas por duas metodologias diferentes: a primeira foi irradiar o compósito com 150 kGy e a segunda foi irradiar a matriz com 15 kGy e então produzir o compósito. Para ambas as metodologias foram utilizadas fibras naturais mercerizadas e não mercerizadas. O efeito dos tratamentos estudados para melhorar a adesão entre a fibra e a matriz polimérica foi avaliado através de caracterizações mecânica, química, térmica e morfológica. Com base neste estudo, observou-se que a fibra do ouriço da castanha do Brasil é um material tecnicamente viável para uso como reforço em compósitos poliméricos. Observou-se que o processo de irradiação da matriz seguida da produção dos compósitos é um método eficaz para melhorar as propriedades térmicas e mecânicas dos compósitos biopoliméricos e que, quando comparado com o processo de mercerização, esse método pode ser considerado mais ambientalmente correto (sem produtos químicos e sem geração de resíduo), mais barato e mais simples. / The interest in the use of natural fibres with polymeric matrix for the preparation of composite spread rapidly over the last years. However, the interfacial adhesion between the fiber and the matrix has to be improved. To improve the adhesion between the constituents and consequently the mechanical and thermal properties of materials, two approaches were investigated: electron beam irradiation and mercerization. This paper describes the fabrication and characterization of biocomposites compounds with high density polyethylene and fibre from Brazil nut pod that were prepared by two different methods: the first irradiating the composite with 150 kGy and the second was radiating matrix with 15 kGy and then produce the composite. For both methodologies, natural fibers, mercerized and non-mercerized were used. The effect of the treatments to improve adhesion between the fiber and the polymer matrix was evaluated through mechanical, chemical, thermal and morphology charcterization. Based on this study, it was observed that fibre from Brazil nut pod is a technically viable material for use as reinforcement in polymer composites. It was observed that the process of matrix irradiation followed by the composite fabrication is an effective method for improving the thermal and mechanical properties of the composites, when compared with mercerization process, this method can be considered more environmentally friendly (no chemicals, and without generating waste), cheaper and simpler.

Three-dimensional graphene foam (3D GrF) is an interconnected, porous structure of graphene sheets with excellent mechanical, electrical and thermal properties, making it a candidate reinforcement for polymer matrices. GrF’s 3D structure eliminates nanoparticle agglomeration and provides seamless pathways for electron travel. The objective of this work is to fabricate low density GrF reinforced epoxy composites with superior mechanical and electrical properties and study the underlying deformation mechanisms. Dip coating and mold casting fabrication methods are employed in order to tailor the microstructure and properties. The composite’s microstructure revealed good interfacial interaction. By adding mere 0.63 wt.% GrF, flexural strength was improved by 56%. The addition of 2 wt.% GrF showed a surge in glass transition temperature (56oC), improvement in damping behavior (150%), and electrical conductivity 11 orders of magnitude higher than pure epoxy. Dip coated and mold casted composites showed a gauge factor of ~2.4 indicating electromechanically robust composite materials.

Le procédé « Resin Transfer Molding » (RTM) est très largement utilisé pour la production industrielle de matériaux composites à matrice thermodurcissable. En effet, de nombreux domaines tels que l’automobile et l’aéronautique l’emploi couramment. Dans ce travail nous avons adapté ce procédé à la mise en œuvre de matériaux composites à matrice thermoplastique afin de répondre aux critères écologiques et économiques imposés aux industries. Pour cela plusieurs étapes ont été nécessaires. La première fut la sélection d’une chimie robuste, adaptée aux exigences du procédé (faible viscosité initiale du système réactif, temps de polymérisation court, etc). La chimie choisie fut la polymérisation anionique par ouverture de cycle de l’ε-caprolactame dans le but d’obtenir du polyamide-6 (PA-6). Une étude rhéo-cinétique ainsi que les caractérisations physico-chimiques d’un PA-6 obtenu au laboratoire furent réalisé. A la suite de cette étape, des essais en conditions de procédé ont été effectué avec l’utilisation d’un équipement pilote dédié. Ces essais furent la source de modifications et d’optimisations de certains paramètres du procédé. La troisième étape, a consisté à la production de pièces composites avec un renfort de type : tissu unidirectionnel de verre. Cette production fut suivie de tests mécaniques et physico-chimiques afin d’évaluer les propriétés de ces pièces. Différents ensimages de tissu ont été étudiés avec, pour objectif, la détermination de celui offrant les meilleures propriétés. Durant cette étude nous avons observé que la nature de l’ensimage impactait peu la chimie. Pour finir, nous avons mis en place un ensimage réactif qui permettra une meilleure interaction fibre/matrice. / The "Resin Transfer Molding" (RTM) process is very largely used for the industrial production of composites materials with thermoset matrix. Indeed, it’s used by many fields such as the automotive and aeronautics. In this work we adapted this process to the manufacture of composite materials with thermoplastic matrix in order to answer the ecological and economic criteria imposed on industries. For that several steps were necessary. The first was the selection of a robust chemistry, adapted to the requirements of the process (low initial viscosity of the reactive system, polymerization time, etc). The selected chemistry, was the ring opening polymerization of ε - caprolactam to obtain polyamide-6 (PA-6). Rhéo-kinetics studies, as well as the physicochemical characterizations of a Pa-6 obtained at the laboratory were carried out. Following this step, tests in conditions of process were carried out with the use of dedicated pilot equipment. These tests were the source of modifications and optimizations of certain parameters of the process. The third step, consisted with the production of composite parts with a reinforcement of the type: unidirectional glass fabric. This production was followed mechanical and physico-chemical tests in order to evaluate the properties of these parts. Various sizing of the glass fabric were studied with, for objective, to determine which to offer the best properties. During this study we observed the low impact of the sizing on the chemistry of PA-6. To finish, we set up a reactive sizing which will allow a better interaction fibre/matrix.