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Marie France Lacrampe

Marie France Lacrampe
IMT Lille Douai · Polymer and Composite Technology & Mechanical Engineering (TPCIM)

About

148
Publications
40,374
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Introduction
Marie France Lacrampe currently works at the Department of Polymers and Composites Technology and Engineering Mechanics, IMT Lille Douai. Marie France does research in Materials Engineering, Materials Chemistry and Nanotechnology. Their current project is 'COMPOSENS Development of polymer-natural-fibre composite materials'.

Publications

Publications (148)
Article
Multiphase systems in which 30 wt% of ductile semi-crystalline polymer, namely poly(butylene succinate-co-adipate) (PBSA), was homogeneously dispersed at the melt state in an amorphous bio-based poly(isosorbide carbonate co-cyclohexanedimethanol) (named PIC). Usually, for the manufacturing of in situ microfiber reinforced polymer composite (MFCs),...
Article
Full-text available
Thin films with (nano)fibrillar morphologies were successfully obtained in fully-biobased poly(butylene succinate-co-adipate)/poly(amide-11) blends (PBSA/PA11, 85/15 w/w) using an extrusion-blowing process. Impacts of PA11 grade and take-up ratio (TUR) on the morphology of PBSA/PA11 were particularly highlighted. SEM analyses indicated that PA11 wi...
Article
An inverse method for determining the in-plane effective thermal conductivity of porous thermoplastics was implemented by coupling infrared thermography experiments and numerical simulation of heat transfer in straight fins having temperature-dependent convective heat transfer coefficient. The microstructure heterogeneity of extruded polyethylene f...
Article
Full-text available
Thermo-mechanical behaviors of thin thermoplastic sheets under thermoforming conditions are generally studied in the frameworks of hyperelasticity and large deformations. The boundary conditions of the mechanical problem which represents the shaping operation are defined by the clamping configuration of the free edges of the sheet. By heating a fla...
Conference Paper
Full-text available
Multiphase biosourced nano-fibrillar polymer/polymer composites based on poly(butylene succinate-co-adipate)/poly(amide-11) blends (PBSA/PA11, 85/15 w/w) were successfully produced via a fast and simple melt extrusion process followed by a tubular film blowing process. The effect of the take-up ratio on the morphological and rheological properties...
Article
Full-text available
In bubble assisted vacuum thermoforming, measuring pressure-induced mechanical strains through the stereo-digital image correlation (stereo-DIC) technique while shaping thermoplastic sheet requires consideration of an appropriate reference state of surface deformations. However, when the stereoscopic measurements can be only performed after the hea...
Presentation
Full-text available
Thermoforming is a standard process which is suitable for forming shell-like thermoplastic parts of 3D shapes. Generally, the used materials are in the form of flat sheets, which are heated, deformed and then cooled. By the end of the heating step, temperature distributions are not homogeneous and hence the imposed mechanical loads to deform the sh...
Presentation
Full-text available
Full-field measurements of principal mechanical strains via the stereo-digital images correlation technique (stereo-DIC) during thermoforming of thin thermoplastic sheets was recently reported as a potential method to control wall-thicknesses under the assumption of material's incompressibility. The accuracy of mechanical strains during forming the...
Conference Paper
Full-text available
Full-field measurement of principal mechanical strains via the stereo-digital images correlation technique (stereo-DIC) during thermoforming of thin thermoplastic sheets was recently reported as a potential method to control the wall-thicknesses under the assumption of material’s incompressibility. The accuracy of mechanical strains during forming...
Poster
Full-text available
A kick event about interreg project named PEPS the 16th May 2019 in Charleville-Mézières at CRITT-MDTS
Article
This paper aims at checking the possibility of substitute metal by filled thermoplastic materials for making finned-tube Heat Exchangers (for HVAC applications, heat recovery …). The influence of low thermal conductivity of a filled polymer on the overall thermal performance of a compact finned-tube Heat Exchanger was numerically analyzed, via Comp...
Article
Full-text available
The aim of this study is to evaluate the effect of printing parameters and their interactions on the mechanical properties of ABS-based specimen, 3D printed by fused deposition modeling (FDM), using the response surface method. The manufacturing direction (X, Y, or Z) and the deposition angle (0°, 30°, or 45°) are analyzed as input factors. The You...
Article
De plus en plus présents, les composites doivent répondre à l'exigence de recyclage imposée par la réglementation. Mais le retraitement de ces produits en fin de vie constitue un véritable casse-tête puisqu'ils sont composés de matières aux propriétés différentes. Que ce soit pour séparer les fibres de la matrice polymères, préserver les caractéris...
Article
This work aims to characterize the mechanical behaviour in tension of biocomposite (polypropylene/flax fibres), using a digital image correlation device The preliminary results show that the strain level at the surface of the tested specimen is not uniform. It also appears that the position of the observation area greatly affects the measured strai...
Article
Full-text available
A numerical study of flow behavior and the heat transfer process of reactive polymer in reactive rotational molding systems is carried out using the Smoothed Particle Hydrodynamics method (SPH). The flow of reactive polymer during rotational molding inside a horizontal rotating cylinder is modeled as the slightly compressible viscous fluid flow and...
Article
Full-text available
Bio-based poly(L-lactide)/poly(amide-11) blends (PLA/PA11, 80/20 w/w) and poly(L-lactide)/poly(amide-6) blends (PLA/PA6, 80/20 w/w) are processed by twin-screw extrusion followed by injection-moulding and key rheological parameters controlling their morphologie are investigated. The same work is done using the same PLA modified by a multi-step reac...
Article
Bio-based polyamide 11 (PA11)–graphene nanoplatelets (GNP) nanocomposites with different filler concentrations were prepared by melt extrusion using a masterbatch dilution process. Graphene platelets are uniformly distributed into the polymer matrix as revealed by scanning electron microscopy. The incorporation of graphene significantly improves th...
Conference Paper
Full-text available
This paper focuses on the potential use of stereo-DIC in thermoforming conditions to monitor large deformations of softened thermoplastic sheets posteriori to the sagging phenomenon. The study concerns HIPS sheets which are softened by the radiative heat-transfer mode then stretched by inflation of compressed-air for 1.5 s to form a large and quasi...
Method
Full-text available
L’identification des lois de comportements des matériaux utilisés en thermoformage et, à terme, le développement de modèles prédictifs de ce procédé requièrent l’analyse fine des effets thermiques et mécaniques induits par les différentes phases de la mise en forme. Les techniques d’imagerie rapide s’avèrent particulièrement intéressantes.
Article
L’identification des lois de comportements des matériaux utilisés en thermoformage et, à terme, le développement de modèles prédictifs de ce procédé requièrent l’analyse fine des effets thermiques et mécaniques induits par les différentes phases de la mise en forme. Les techniques d’imagerie rapide s’avèrent particulièrement intéressantes.
Conference Paper
An inverse method for determining the in-plane effective thermal conductivity of porous thermoplastics was implemented by coupling infrared thermography experiments and numerical solution of heat transfer in straight fins having temperature-dependent convective heat transfer coefficient. The obtained effective thermal conductivity values were compa...
Article
Key relationships between foam morphologies and melt-state rheological parameters are here exposed for biobased poly(butylene-succinate) (PBS) and standard petrobased polyethylene (PE) foams processed by single-screw extrusion. Scanning electron microscopy followed by image analysis revealed cell diameters and densities in the range of 250–700 µm a...
Article
La fabrication additive est un concept apparu il y a plus de 30 ans. A l’origine utilisée pour la fabrication de prototypes permettant de valider un concept ou un design, son usage a été étendu à la fabrication rapide d’outils (moules, outillages). Aujourd’hui, le terme regroupe un ensemble de technologies de fabrication, présentant un potentiel, p...
Conference Paper
Full-text available
In the field of experimental mechanics, interest is more and more attributed to designing original single multiaxial tests which can exhibit heterogeneous mechanical responses for parameters identification. In fact, classical identification procedures of biaxial thermoplastic properties which rely on simple isotropic behavior obtained from uniaxial...
Poster
Full-text available
Développement d’outils expérimentaux et de méthodologies pour optimiser l’identification des paramètres matériaux in-situ.
Article
Les polymères thermoplastiques peuvent, moyennant compoundage avec des charges conductrices adéquates et optimisation du design et de la compacité des échangeurs thermiques, se révéler des matériaux de construction intéressants, non seulement en termes d’efficacité thermique et de rendement énergétique, mais également d’allègement, de coût, de faci...
Article
Full-text available
Les polymères à structure cellulaire obtenus par extrusion-moussage peuvent présenter des propriétés électroactives, ajustables via la microstructure induite par le procédé, intéressantes pour des applications dans le domaine des objets connectés, capteurs tactiles ou récupérateurs d'énergie.
Conference Paper
Full-text available
Microfibrillar polymer / polymer composites constitute a particular kind of multiphase polymeric materials in which the minor phase is in the form of filaments dispersed in the continuous phase and behave like fibrillar meltable solid particles. Compared to traditional composites, the polymer/polymer composites are light weight recyclable materials...
Article
Full-text available
This study is dedicated to the development of a numerical finite-element solution to determine the effective thermal conductivity of extruded polymeric foam with different levels of open and closed porosity. The implemented numerical method is derived from periodic homogenization techniques used for the simulation of laser welding of composite mate...
Article
The energy harvesting efficiency of melt processed polyamide 11(PA11) films and its nanocomposites have been investigated as a function of filler type and content. In the present work, nanoclays have been used as structural modifiers in PA 11 matrix. Nanocomposites were prepared using layered clays namely Cloisite 20A, 10A and Na⁺by extrusion proce...
Article
Full-text available
Plastiques & Caoutchoucs Magazine, N°929, pp 46-48, 2016 Résumé Connaître le comportement rhéologique des mélanges de polymères et maîtriser leur mise en oeuvre améliore efficacement leurs performances mécaniques, sans pénaliser la masse et l'aptitude au recyclage. Contexte industriel - Méthodes d’élaboration des composites microfibrillaires -...
Conference Paper
Full-text available
This paper aims at improving the mechanical behavior of biobased brittle amorphous polylactide (PLA) by extrusion melt-blending with biobased semi-crystalline polyamide 11 (PA 11) and addition of natural halloysite nanotubes (HNT). The structure and properties of PLA/PA11/HNT blends were studied in terms of morphological, thermal and mechanical pro...
Article
Full-text available
The construction of mesoscopic models of fiber washing effects during the high pressure resin transfer molding (RTM) process with thermoplastic polymers requires the knowledge of the limit of adhesion coefficients between dry and impregnated fabric reinforcement plies and the mold. To measure these coefficients, a new method is described. During RT...
Article
Full-text available
This paper aims at improving the mechanical behavior of biobased brittle amorphous polylactide (PLA) by extrusion melt-blending with biobased semi-crystalline polyamide 11 (PA11) and addition of halloysite nanotubes (HNT). The morphological analysis of the PLA/PA11/HNT blends shows a strong interface between the two polymeric phases due to hydrogen...
Conference Paper
Full-text available
A fracture mechanics approach (Essential Work of Fracture, EWF) was applied to assess the toughness of novel partly starch-grafted polyolefin blown films, compared to that of a neat polyethylene reference. Tests were performed on double-end notched samples. The digital image correlation method was used to monitor the deformation field around the no...
Article
In this work, an experimental investigation on a partial shape memory polymer (PSMP) which is transformed into shape memory material is presented. Multicycle shape memory tests are performed on thermoplastic polyurethane (TPU) at 70°C. At the end of each cycle, the capacity of the shape memory material increases. At the end of the first cycle, the...
Article
The effects of an epoxide-based chain-extender (CE) on the properties of poly(lactic acid) (PLA) foams obtained by chemical foaming extrusion using 4 wt.% of chemical foaming agent (CFA) were studied. PLA/CE blends with different weight ratios of CE were initially processed using a co-rotating twin-screw extruder. PLA/CE foams were then produced us...
Article
Starch was combined with plasticizers such as glycerol, sorbitol, glycerol/sorbitol and urea/ethanolamine blends by means of high shear extrusion process to prepare thermoplastic starch (TPS). Effect of storage time and plasticizers on the structural stability of melt processed TPS was investigated. Morphological observation, X-ray diffraction (XRD...
Article
Novel porous bionanocomposites based on halloysite nanotubes as nanofillers and plasticized starch as polymeric matrix were successfully prepared by melt-extrusion. Foaming was obtained by adding water as natural blowing agent, and by increasing the die temperature. Both the expansion ratio and the porosity increase with increasing die temperature....
Article
Phosphorous antioxidants efficiency against molten polypropylene (PP) thermal oxidation was assessed during isothermal ageing and processing by rotational molding. During isothermal ageing, experimental data were compared to the ones calculated on the basis of a kinetic model. Phosphonite is more effective than phosphite. Both phosphite and phospho...
Article
In situ fibrillation of PP/PA6 blends (85/15 wt %) is investigated in presence of two kinds of organically modified montmorillonite, differing by the polarity of their surfactant. The organoclay is primary dispersed either in the PP (for the low-polarity Cloisite® 15A) or in the PA6 (for the high-polarity Cloisite® 30B), according to its assumed af...
Conference Paper
Thermoplastic composites have an increasing demand in the automotive industry. However, their relatively high viscosity poses manufacturing challenges. Especially in the RTM process lower viscosities or process changes are required to overcome bundle deformation or preform washing. To improve the cycle time and the part quality CETIM is developing...
Conference Paper
Thermoplastic PolyOlefin (TPO) materials have proven to be of great interest to automotive applications. The mechanical characteristics of these materials can help to implement solutions to respond to environmental and economical regulatory constraints of the last decade. In fact, beyond their low cost and high degree of recyclability, they allow i...
Article
A numerical study is developed to predict of flow behavior and heat transfer processes during rotational molding of polymer powder by using Discrete Element Method (DEM). The aim of this study is to model different forms, the evolution of mixing and segregation and the evolution of heat transfers in polymer powder. Influence of physical and thermal...
Article
During the last decades, automotive industry has to meet many environmental constraints and to reduce the cost and the energy conception. Giving their mechanical properties and low manufacturing cost, thermoplastic multilayered materials have proven to be an adequate solution for such applications. In this paper, the particular combination of Therm...
Article
Nanocomposites reinforced with hybrid fillers of carbon nanotubes (CNTs) and clays were developed, aiming at enhancing the dispersion of nanofillers with balanced mechanical properties while lowering the cost of the final product. Polypropylene-based nanocomposites were prepared by the master batch dilution technique with varying combinations of CN...
Article
This article aims at preparing and characterizing efficiency of melt-extruded polymer nanocomposites-based drug delivery systems with tailored drug release properties. 5-aminosalycylic acid (5-ASA)-loaded halloysite nanotubes (HNT)/plasticized starch nanocomposites were prepared and evaluated for the drug release, swelling characteristics, and degr...
Article
Immiscible PET/PE blends (80/20 wt %) were prepared on an industrial twin-screw extruder with and without different types of commercially available montmorillonites (Cloisite® C15A, C10A, and 30B), containing organic surfactants differing by their polarities and their thermal stability). XRD and TEM observations evidence an intercalated structure,...
Article
This work aims at numerically simulating the flow of nanocomposites in a twin-screw mixer so as to develop a prediction tool of nanofiller dispersion and distribution in a polymer matrix during processing. The rheological behaviour of polyamide 6/carbon nanotubes blends (PA6/MWCNT) containing from 1 to 5 wt.% of MWCNT was investigated over a large...
Article
Full-text available
This work aims at establishing the effect of stress and temperature on the velocity of ultrasonic longitudinal waves in typical engineering polymers, and evaluating the potential of ultrasonic stress measurement in the evaluation of residual stresses in polymer parts. In order to estimate the effect of material morphology, two amorphous and two sem...
Conference Paper
Full-text available
Partly bio-based segmented thermoplastic polyurethane (bioTPU) formulations were developed to fulfill the requirements of the reactive rotational molding process (see Figure 1), namely: (i) synthesis from industrially available raw materials, by one-shot bulk-polymerization, in air; (ii) reaction occurring at temperatures close to room temperatur...
Article
This article is part of an ambitious project. The aim is to simulate mechanical properties of rotomolded part from micro-structure consideration. Main objective here is to consider metallocene polypropylene crystallization kinetic (PP) during cooling stage in rotational molding. Crystallization kinetic of metallocene PP is so rapid that microscopy...
Article
Bio-based polyamide 11 and natural halloysite nanotubes (HNTs) were used for the preparation of PA-11/HNT nanocomposites with varying nanotubes concentrations by melt extrusion using a masterbatch dilution process. The prepared nanocomposites were analyzed for microstructural changes, transparency, thermal stability, rheological behavior, dielectri...
Conference Paper
Full-text available
The most important function of food packaging is to protect the product against external contamination. However, food packaging is not completely inert in contact with foodstuff. Additives and volatile substances present in the polymeric packaging material can migrate into the food. Furthermore, food packaging materials could be degraded during the...
Conference Paper
Full-text available
Biodegradable bio-based polymers such as polylactides (PLA) have been largely studied for disposable applications (i.e.., packaging), and more recently, they are also tested for durable applications. However, their performances do not completely fullfil the strict requirements for certain industrial applications, such as for automotive industry. On...
Article
Full-text available
Partly bio-based segmented thermoplastic polyurethane (TPU) formulations were developed to fulfill the requirements of the reactive rotational molding process. They were obtained by one-shot bulk polymerization between an aliphatic diisocyanate (1,6-hexamethylene diisocyanate), a polyether polyol as macrodiol (polyethylene glycol) and a bio-based c...