Reprocessing of wood flour reinforced polypropylene composites: Impact of particle size and coupling agent on composite and particle properties
作者： L. Soccalingame , A. Bourmaud , D. Perrin , J.-C. Bénézet , A. Bergeret
DOI: 10.1016/J.POLYMDEGRADSTAB.2015.01.020
关键词: Particle size 、 Composite number 、 Materials science 、 Ultimate tensile strength 、 Polypropylene 、 Wood flour 、 Composite material 、 Extrusion 、 Molding (decorative) 、 Biocomposite
摘要: This work aims to understand the degradation induced by multiple injection molding cycles on numerous properties of wood flour reinforced polypropylene (PP) composites. The influence initial particle size was studied as well addition grafted with maleic anhydride (PPgma) a coupling agent at given rate. Biocomposite compounds (20wt% flour) are produced twin-screw extrusion. Then, and grinding were performed (up 7 cycles) obtain normalized samples. evolution characteristics is first assessed SEM observation, measurements nanoindentation experiments. PP matrix microstructure determined SEC tests (average molecular weight measurements), rheometer DSC (polymer crystallinity). Finally, material mechanical measured macro-scale thanks tensile tests. Our experimental results show that composite remain quite stable after processing despite degradation.
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