Shape memory Poly(lactic acid) binary blends with unusual fluorescence
Shape memory Poly(lactic acid) binary blends with unusual fluorescence
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DOI：
10.1016/j.polymer.2020.122980
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发表时间：
2020-11
期刊：
影响因子：
4.6
通讯作者：
Shuai Zhang;Tuan Liu;Baoming Zhao;Christina Verdi;Wangcheng Liu;Cheng Hao;Jinwen Zhang
中科院分区：
文献类型：
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作者：
Shuai Zhang;Tuan Liu;Baoming Zhao;Christina Verdi;Wangcheng Liu;Cheng Hao;Jinwen Zhang
通过多官能预聚物（GSE）与PLA在没有外部催化剂的情况下的反应性复合制备具有形状记忆、荧光和改善的韧性的多官能PLA共混物。GSE是通过甘油介导的琥珀酸酐和乙二醇二缩水甘油醚的本体聚合而合成的，并且其在配混期间发生的自交联反应引入了分散在PLA基质中的弹性体聚合物。在界面处的酯交换使PLA共混物相容，从而显著改善韧性。此外，所得到的PLA共混物显示出强的荧光，并且具有40%GSE的PLA共混物的荧光强度比纯交联GSE的荧光强度更强。PLA共混物还表现出优异的形状记忆性能，这可以通过较大变形的韧性改善和用于存储由变形引起的内应力的交联的富含GSE的相来解释。本文介绍了一种新的聚乳酸智能材料的制备方法，通过简单的熔融复合聚乳酸和多功能改性剂（GSE），具有改善的韧性，强荧光，形状记忆。
A multifunctional PLA blend with shape memory, fluorescence and improved toughness is prepared via reactive compounding of a multifunctional prepolymer (GSE) with PLA in the absence of an external catalyst. GSE is synthesized by glycerol-mediated bulk polymerization of succinic anhydride and ethylene glycol diglycidyl ether, and its self-crosslinking reaction taking place during compounding introduces an elastomeric polymer dispersed in the PLA matrix. The transesterification at the interface compatibilizes the PLA blend resulting in significantly improved toughness. Moreover, the resulting PLA blend exhibits strong fluorescence, and the fluorescence intensity of the PLA blend with 40% GSE is stronger than that of neat crosslinked GSE. The PLA blend also exhibits an excellent shape memory property, explained by the improved toughness for larger deformation and the crosslinked GSE-rich phase for the storage of internal stress induced by deformation. This work introduces a new preparation method for a smart PLA material with improved toughness, strong fluorescence, and shape memory by simple melt compounding of PLA and a multifunctional modifier (GSE).