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Design of highly tough poly(l-lactide)-based ternary blends for automotive applications

机译:用于汽车的高韧性聚(丙交酯)基三元共混物的设计

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摘要

Technical renewable poly(l-lactide) (PLA)-based blends represent an elegant way to achieve attractive properties for engineering applications. Recently, the miscibility between PLA and poly(methyl methacrylate) (PMMA) gave rise to new formulations with enhanced thermo-mechanical properties but their high brittleness still remains a challenge to be overcome. This work here focuses on rubber-toughened PLA/PMMA formulations for injection-molding processes upon the addition of a commercially available ethylene-acrylate impact modifier (BS). The miscibility between PLA and PMMA is not altered by the presence of BS but the incorporation of BS (17% by weight) into a PLA/PMMA matrix could enhance both ductility and toughness of PLA/PMMA blends for PMMA content up to 50 wt %. An optimum range of particle sizes (d(n) approximate to 0.5 mu m) of the dispersed domains for high impact toughness is identified. These bio-based ternary blends appear as promising alternatives to petro-sourced blends such as ABS-based blends in engineering injection-molding parts. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43402.
机译:基于技术的可再生聚(l-丙交酯)(PLA)的混合物代表了一种实现工程应用吸引人的特性的绝妙方法。最近,PLA与聚甲基丙烯酸甲酯(PMMA)之间的可混溶性产生了具有增强的热机械性能的新配方,但它们的高脆性仍然是需要克服的挑战。本文的工作重点是在添加可商购的乙烯-丙烯酸酯抗冲改性剂(BS)后,对用于注塑成型工艺的橡胶增韧PLA / PMMA配方。 BS的存在不会改变PLA和PMMA之间的可混溶性,但是将PLA(17%重量)掺入PLA / PMMA基体中可以提高PLA / PMMA混合物的延展性和韧性,而PMMA含量不超过50 wt% 。确定了用于高冲击韧性的分散域的最佳粒径范围(d(n)约0.5微米)。这些生物基三元共混物似乎可以替代石油来源的共混物,例如工程注塑零件中基于ABS的共混物。 (c)2016 Wiley Periodicals,Inc. J. Appl。 Polym。科学2016,133,43402。

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