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Optimizing the balance between stiffness and flexibility by tuning the compatibility of a poly(lactic acid)/ethylene copolymer

机译：通过调整聚乳酸/乙烯共聚物的相容性来优化刚度和柔韧性之间的平衡

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The brittleness of poly(lacticacid) (PLA) is a major drawback for its wide application. In this study, a super-flexible PLA material was prepared by reactive blending of PLA with poly(ethylene-glycidyl methacrylate) (EGMA), and the weight ratio was fixed at 95?:?5. The investigation showed that the PLA/EGMA blend had limited interfacial compatibility. The strong interfacial interaction and fine dispersion of EGMA particles were obtained by using initiator DCP, which it had been demonstrated could accelerate the reaction efficiency between PLA and EGMA. The elongation at break of the PLA/EGMA/DCP blend was remarkably improved, about 58 folds that of neat PLA. More importantly, its outstanding tensile strength and transparency were definitely maintained as that of neat PLA. Our work provides an effective method to largely improve the flexibility of PLA without sacrificing its stiffness and transparency, which is very important for the wide application of PLA materials.
机译：聚乳酸（PLA）的脆性是其广泛应用的主要缺点。在这项研究中，通过将PLA与聚（甲基丙烯酸缩水甘油酯）（EGMA）进行反应共混制备了超柔韧的PLA材料，其重量比固定为95？：？5。调查表明，PLA / EGMA共混物的界面相容性有限。用引发剂DCP获得了较强的界面相互作用和EGMA颗粒的精细分散，这已证明可以促进PLA与EGMA之间的反应效率。 PLA / EGMA / DCP共混物的断裂伸长率显着提高，约为纯PLA的58倍。更重要的是，其出色的拉伸强度和透明性绝对可以保持与纯PLA相同。我们的工作提供了一种有效的方法，可以在不牺牲其刚度和透明度的情况下大大提高PLA的柔韧性，这对于PLA材料的广泛应用非常重要。

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