增韧
材料科学
韧性
艾氏冲击强度试验
共聚物
脆性
复合材料
高分子科学
乳酸
增塑剂
聚合物
极限抗拉强度
遗传学
生物
细菌
作者
Hongzhi Liu,Jinwen Zhang
摘要
Abstract Renewable poly(lactic acid) (PLA) exhibits high strength and stiffness. PLA is fully biodegradable and has received great interest. However, the inherent brittleness of PLA largely impedes its wide applications. In this article, the recent progress in PLA toughening using various routes including plasticization, copolymerization, and melt blending with flexible polymers, was reviewed in detail. PLA toughening, particularly modification of impact toughness through melt blending, was emphasized in this review. Reactive blending was shown to be especially effective in achieving high impact strength. The relationship between composition, morphology, and mechanical properties were summarized. Toughening mechanisms were also discussed. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011.
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