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...

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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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The emergent biobased polymer poly (ethylene 2,5-furandicarboxylate), PEF, has been studied through an innovative approach based on pole figures and orientation factor calculation. PEF uniaxial stretching was performed with different mechanical conditions (different equivalent strain rates), up to several levels of strain and while considering...

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An efficient one-step extraction method was developed for the recovery of additives and non-intentionally added substances (NIAS) from polystyrene, performed at room temperature for 2.33 h, without grinding to avoid fostering the formation of NIAS unrelated to polymer processing. Solvent use (39.2 mL/g) was greatly reduced compared with...

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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...