writer：Wei Bao, Yunbao Gao, Jianing Zhang, Jing Jin, Na Zhang, Baijun Liu, Mingyao Zhang, Zhaohui Su, Hongwen Liang, Xiangling Ji, Wei Jiang
keywords：PLA, 韧性, PBAT, PEBA, 核壳结构
source：期刊
specific source：Polymer, 2025, 326, 128330
Issue time：2025年

摘要：通过将聚乳酸（PLA）与聚己二酸-对苯二甲酸丁二醇酯（PBAT）和聚醚嵌段酰胺（PEBA）熔融共混，成功制备了以核壳结构增韧的可生物降解聚乳酸（PLA）共混物。扫描电镜（SEM）和原子力显微镜-红外（AFM-IR）分析证实PLA基体中存在核壳结构，其中核为PBAT、壳为PEBA。为提高PLA与PEBA的界面相容性，将甲基丙烯酸缩水甘油酯（GMA）接枝到PEBA上得到PEBA-GMA共聚物。PEBA-GMA中的环氧基与PBAT和PLA的端基（-OH、-COOH）反应，增强了PLA/PEBA和PEBA/PBAT的界面相容性，从而改善了共混物的韧性和力学性能。

Abstract：Biodegradable poly(lactic acid) (PLA) blends toughened with a core-shell structure were successfully prepared by melt-blending PLA with poly(butylene adipate-co-terephthalate) (PBAT) and poly(ether-block-amide) (PEBA). Scanning electron microscopy (SEM) and atomic force microscopy-infrared (AFM-IR) analyses confirmed the presence of core-shell structure in the PLA matrix, in which the core and the shell are PBAT and PEBA, respectively. To enhance the interfacial compatibility between PLA and PEBA, glycidyl methacrylate (GMA) was grafted onto PEBA, yielding the PEBA-GMA copolymer. The epoxy groups in PEBA-GMA reacted with the end groups (-OH, -COOH) of PBAT and PLA, which enhanced the interfacial compatibility of PLA/PEBA and PEBA/PBAT, thereby improving the toughness and mechanical properties of the blends.

论文链接：https://doi.org/10.1016/j.polymer.2025.128330