文献：PLA-PEG-PLA三嵌段共聚物：有效的增容剂，可改善PLA/PBAT共混物的界面结构和机械性能

链接：https://www.sciencedirect.com/science/article/abs/pii/S0032386118304336

作者：岳丁，吴通 峰 ，博鲁阿  ，王平利  ，王 葛侠，吉俊辉  

节选：

本研究旨在获得一种有效的聚乳酸 (PLA) 和聚己二酸丁二醇酯 (PBAT) 共混物的增容剂。合成了不同链长的 PLA-聚乙二醇-PLA (PLA-PEG-PLA) 三嵌段共聚物，用于乳化界面层并改善PLA/PBAT 共混物的界面黏附性。表征了三嵌段共聚物的结构，并基于共混物的微观结构和热力学、力学和流变性能考察了其增容效果。当乙二醇/乳酸链段比为 2.1 时，三嵌段共聚物对 PLA/PBAT 共混物表现出良好的增容效果。添加该增容剂的共混物的伸长率高达 173.4%，是未添加增容剂共混物的 8 倍。结果表明，PLA-PEG-PLA三嵌段共聚物可作为PLA/PBAT共混物的有效增容剂，改善界面相互作用。

Abstract

The aim of this study was to obtain an effective compatibilizer for the blends of polylactic (PLA) and poly(butylene adipate-co-terephthalate) (PBAT). PLA-polyethylene glycol-PLA (PLA-PEG-PLA) tri-block copolymers with different chain lengths were synthesized to emulsify the interfacial layer and improve the interfacial adhesion of PLA/PBAT blends. The structure of the tri-block was characterized, and the compatibilization effect was examined based on the microstructures and the thermodynamic, mechanical, and rheological properties of the blends. The tri-block copolymers exhibited attractive compatibilizing efficiency for PLA/PBAT blends when the segment ratio of ethylene glycol/lactic was 2.1. The elongation of the blends with the compatibilizer was as high as 173.4%, eight times more than the pristine blends. Moreover, there were typical sea-island microstructure changes to the continuous phase, and thread-like fibers appeared in the tensile-fracture images. The experimental results established that the PLA-PEG-PLA tri-block copolymers can act as an effective compatibilizer for PLA/PBAT blends to improve the interaction of the interface.

西安齐岳生物提供相关产品：

PLLA-NH2

PDLLA-SH

PLLA-SH

PDLLA-CHO

PLLA-CHO

NH2-PDLLA-NH2

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