COMBEAUD , Christelle

This paper presents an experimental characterization of the volume defects in polystyrene extrusion. In a first step, these defects are quantified in capillary rheometry. In a second step, a transparent slit die, fed by an extruder, is used to perform birefringence experiments and to visualize stress transients during the instability....

The biaxial behavior of PEF has been analyzed for equilibrated and simultaneous biaxial stretching. The ability of PEF to develop an organized microstructure through strain induced crystallization (SIC) has been described. Upon biaxial stretching, SIC can be difficult to perform because the stretching is performed in two perpendicular...

Le poly(éthylène 2,5-furandicarboxylate), plus communément appelé « PEF » est un nouveau venu dans le monde des polymères. Il s'agit d'un polymère qui est considéré comme l'analogue entièrement biosourcé du poly(éthylène téréphtalate) ou « PET », issu de la pétrochimie. Bien que ces deux molécules soient très proches (Figures 1 et 2), la...

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Poly(ethylene 2,5-furandicarboxylate), referred to as PEF, was uni-axially stretched for temperatures above glass transition temperature. This bio-based polymer is considered as a serious competitor for the petroleum analogous poly(ethylene terephthalate), named PET. To replace PET in bottle forming, PEF has to be deformed to large strains...

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Poly(ethylene 2,5-furandicarboxylate) (PEF) is an emerging biobased thermoplastic polymer that may replace PET for stretching applications such as bottle blowing, thermoforming, or film extrusion. The stretch ability and strain induced microstructure in PEF have not been fully addressed in the literature despite being the key issue for...

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The aim of this work is to assess the potential of graphene nanoplatelets (GNP) according to their production method to improve properties of composites based on polypropylene and elaborated by melt mixing. The effects of GNP size on structural, thermal, rheological and mechanical properties of composites were investigated. Three grades of...