Poly(lactic acid) (PLA) is regarded as one of the most promising biobased and biodegradable polymers due its various advantages including high mechanical strength, easy processability, high melting temperature, renewability, biodegradability, and biocompatibility. However, the inherent brittleness significantly restricts its wide application. Therefore, toughening PLA has attracted more and more attention and various materials have been used to blend with PLA for toughening. Considering the fact that the use of petroleum-based species to toughen PLA would partially sacrifice the sustainability, various renewable polymers have recently been employed to toughen PLA. A series of important achievements have been obtained but not reviewed. This article aims to review progress in toughening PLA with renewable polymers. The toughening theories and compatibilization strategies are also briefly introduced.

中文翻译：

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可再生聚合物增韧聚乳酸的研究进展

聚乳酸（PLA）具有各种优势，包括高机械强度，易加工性，高熔融温度，可再生性，生物降解性和生物相容性，被认为是最有前途的生物基和生物降解性聚合物之一。但是，固有的脆性极大地限制了其广泛的应用。因此，增韧PLA已引起越来越多的关注，并且已经使用多种材料与PLA共混以增韧。考虑到使用石油基物质增韧PLA会部分牺牲可持续性这一事实，最近已使用各种可再生聚合物来增韧PLA。已经取得了一系列重要成就，但尚未进行审查。本文旨在回顾使用可再生聚合物增韧PLA的进展。