عنوان	Phase structure, mechanical properties and failure behavior of compatibilized polylactide/polyamide 11 systems
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	blending, mechanical properties, morphology, polyamide 11, polylactide, toughness
چکیده	Attempt was made to enhance the physical properties of fully bio-based incompatible polylactide (PLA)/polyamide 11 (PA11) blend by using ethylene-butyl acrylate-glycidyl methacrylate terpolymer (EBA-GMA) as both compatibilizer and impact modifier. Interfacial energy measurements predicted that the EBAGMA would localize at the interface of components in PLA/PA11 samples. Morphological investigations demonstrated a combination of complete wetting and partial wetting phase structure for PLA/PA11/EBA-GMA (70/30-x/x) systems containing 30 wt% modifier phases. When presented at 10–15 wt%, EBA-GMA formed an interfacial layer around the minor PA11 phase domains and produced a fine dispersion of PA11 in the PLA. Increasing EBA-GMA to 20 wt% led to a reduction in the degree of encapsulation of PA11 by EBA-GMA, and a coarser dispersion of EBA-GMA was also observed in the resulting ternary blend. Compatibility between the components of the PLA/PA11/EBA-GMA ternary samples was investigated by dynamic mechanical analysis (DMA). The maximum impact toughness was achieved for PLA/PA11/EBA-GMA (70/15/15) blend, which exhibited the excellent dispersion state of both PA11 and EBA-GMA phases in the PLA. Impact fractography revealed the generation of multiple voids and cavities either around the PA11 or inside the EBA-GMA phase regions during the fracture process. The generation of such micro-voids followed by their plastic growth during crack propagation activated plastic deformation of the PLA, serving as the primary source in the dissipation of impact fracture energy.
پژوهشگران	حکیمه قلعه (نفر دوم)، سینا حاجی بابازاده (نفر اول)، میرکریم رضوی آقجه (نفر چهارم)، مجید مهرابی مزیدی (نفر سوم)