官能化PBAT的制备及对PBAT/TPS/PLA共混物的增容作用  

Functionalization of PBAT and Its Compatibilizing Effect on PBAT/TPS/PLA Blends

作　　者：张广翔 杨可 杨佳怡 刘阳 郑松祺 赵桂艳 ZHANG Guangxiang;YANG Ke;YANG Jiayi;LIU Yang;ZHENG Songqi;ZHAO Guiyan(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001

出　　处：《高等学校化学学报》2024年第12期152-161,共10页Chemical Journal of Chinese Universities

基　　金：辽宁省教育厅科研基金(批准号:LJKMZ20220733)资助.

摘　　要：采用熔融共混法制备聚对苯二甲酸/己二酸丁二醇脂(PBAT)/热塑性淀粉(TPS)/聚乳酸(PLA)共混物.为改善共混物之间的相容性,通过自由基接枝方法制备了PBAT接枝马来酸酐(PBAT-MA)和PBAT接枝甲基丙烯酸缩水甘油酯(PBAT-GMA)两种反应型相容剂,通过流变测试、拉伸测试、扫描电子显微镜(SEM)和动态力学分析(DMA)等手段探究了两种相容剂与TPS和PLA之间的相互作用以及它们对PBAT/TPS/PLA共混物性能的影响.DMA和SEM测试结果显示,两种相容剂的加入显著改善了共混物的相容性和分散相的分散性.流变测试和力学性能测试结果表明,添加了两种相容剂的PBAT/TPS/PLA共混物比单独使用PBAT-MA相容剂的共混物具有更高的复合黏度和更优异的力学性能,当m(PBAT)∶m(TPS)∶m(PLA)=60∶20∶20时,共混物的屈服强度达到13.2 MPa,拉伸弹性模量达到150.3 MPa.本文工作为制备低成本高性能PBAT基复合材料提供了一种新策略.In this paper,poly(butylene adipate-co-terephthalate)(PBAT)/thermoplastic starch(TPS)/poly(lactic acid)(PLA)blends were prepared through melt blending.To improve the compatibility of the blend,two reactive compatibilizers,PBAT grafted with maleic anhydride(PBAT-MA)and PBAT grafted with glycidyl methacrylate(PBAT-GMA)were prepared via free radical grafting.The interaction of the two compatibilizers with TPS and PLA and their effects on the properties of PBAT/TPS/PLA blends were investigated by rheological behavior test,tensile test,scanning electron microscopy(SEM)and dynamic mechanical analysis(DMA).The DMA and SEM results confirmed that the addition of both compatibilizers significantly improved the compatibility of the blend and the dispersion of the dispersed phase within the blend.The results of the rheological behavior and mechanical properties showed that the PBAT/TPS/PLA blend with two compatibilizers had better mechanical properties than that of the blend with the PBAT-MA compatibilizer alone.When the mass ratio of PBAT/TPS/PLA was 60∶20∶20,the yield strength of the blend reached 13.2 MPa and the tensile elastic modulus reached 150.3 MPa.This work provides a new strategy for preparing low-cost and high-performance PBAT matrix composites.

关 键 词：聚己二酸/对苯二甲酸丁二醇酯 聚乳酸 热塑性淀粉 相容剂 熔融共混 

分 类 号：O631[理学—高分子化学]