Superior Toughened Biodegradable Poly(L-lactic acid)-based Blends with Enhanced Melt Strength and Excellent Low-temperature Toughness via In situ Reaction Compatibilization

作     者：Shi-Ling Jia Xiang-Yu Wang Ye Zhang Xiang-Yu Yan Hong-Wei Pan Yan Zhao Li-Jing Han Hui-Liang Zhang Li-Song Dong Hui-Xuan Zhang Shi-Ling Jia;Xiang-Yu Wang;Ye Zhang;Xiang-Yu Yan;Hong-Wei Pan;Yan Zhao;Li-Jing Han;Hui-Liang Zhang;Li-Song Dong;Hui-Xuan Zhang

作者机构：Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Materials Science and EngineeringChangchun University of TechnologyChangchun 130012China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2023年第41卷第3期

页      面：373-385,I0007页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the Science and Technology Development Plan of Jilin Province (No. 20210203199SF) 

主　　题：Poly(L-lactic acid) PBST Compatibilization Super toughness Low-temperature mechanical properties Biodegradability 

摘      要：The toughened poly(L-lactic acid)/poly(butylene succinate-butylene terephthalate)(PLLA/PBST) blend with enhanced melt strength and excellent low temperature toughness and strength was prepared by melt compounding through in situ compatibilization reaction in presence of multifunctional epoxy compound(ADR).The PLLA/PBST blend was an immiscible system,and the compatibility of the PLLA/PBST blend was improved after adding *** and GPC curves confirmed the formation of the PLLA-g-PBST copolymer,which improved the interfacial bonding of the blend and therefore the PLLA/PBST/ADR blend showed excellent melt strength and mechanical *** the PLLA/PBST/ADR blend with 70/30 PLLA/PBST content,the complex viscosity increased significantly with increasing ADR ***,the tensile strength,elongation at break and impact strength all increased obviously with increasing the ADR *** elongation at break of the blend reached the maximum value of 392.7%,which was 93.2 times that of neat *** the impact strength of the blend reached the maximum value of 74.7 k J/m~2,which was 21.3 times that of neat ***,the PLLA/PBST/ADR blend exhibited excellent lowtemperature toughness and *** –20 ℃,the elongation at break of the PLLA/PBST/ADR blend was as high as 93.2%,and the impact strength reached 18.8 k J/m~***,the tensile strength of the blend at low temperature was also high(64.7 MPa),which was beneficial to the application of PLA in the low temperature *** addition,the PLLA/PBST/ADR blend maintaind good biodegradability,which was of great significance to the wide application of PLLA.