超韧聚乳酸/乙烯丙烯酸丁酯甲基丙烯酸缩水甘油酯共混物的制备与性能  

Preparation and Properties of Highly Toughened Poly(lactic acid)/Ethylene-Butyl Acrylate-Glycidyl Methacrylate Graft Copolymer Blends

作　　者：周正 夏艺玮 金杰 郑松祺 周思宇 赵桂艳 ZHOU Zheng;XIA Yi-Wei;JIN Jie;ZHENG Song-Qi;ZHOU Si-Yu;ZHAO Gui-Yan(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：《应用化学》2024年第4期529-537,共9页Chinese Journal of Applied Chemistry

基　　金：辽宁省教育厅科学技术研究项目(No.LJKMZ20220733)资助。

摘　　要：向聚乳酸(PLA)和乙烯丙烯酸丁酯甲基丙烯酸缩水甘油酯(EBA-GMA)接枝共聚物的共混物PLA/EBA-GMA(质量比,70/30)中引入催化剂(N,N-二甲基十八胺,DMSA),通过促进PLA与EBA-GMA的原位反应增容来提高共混体系的冲击韧性,并研究了DMSA质量分数对共混体系力学性能的影响。结果显示,未添加DMSA时,PLA/EBA-GMA(70/30)共混物的冲击强度仅为10.9 kJ/m^(2)。当DMSA质量分数为0.5%时,PLA/EBA-GMA(70/30)共混物的冲击强度高达63.1 kJ/m^(2)。共混物结构与形态表征结果表明,添加少量DMSA就能有效促进EBA-GMA上环氧基团与聚乳酸端基的反应活性,提高PLA/EBA-GMA共混物的冲击韧性。This article introduces a catalyst,(N,N-dimethyl-octadecylamine,DMSA),into the blend of poly(lactic acid)(PLA)and ethylene-butyl acrylate-glycidyl methacrylate graft copolymer(EBA-GMA),to improve the impact toughness of the PLA/EBA-GMA(70/30)blend system through the promotion of in-situ reaction between PLA and EBA-GMA.The influence of DMSA content on the mechanical properties of the blend system was investigated.The results show that the impact strength of the PLA/EBA-GMA(70/30)blend without DMSA is only 10.9 kJ/m^(2).When the content of DMSA is 0.5%,the impact strength of the PLA/EBA-GMA(70/30)blend reaches as high as 63.1 kJ/m^(2).Structural and morphological characterizations indicate that the addition of a small amount of DMSA effectively promotes the reactivity between epoxy groups on EBA-GMA and terminal groups of PLA,thereby enhancing the impact toughness of the PLA/EBA-GMA blend.

关 键 词：聚乳酸 乙烯丙烯酸丁酯甲基丙烯酸缩水甘油酯接枝共聚物 催化剂 增韧 

分 类 号：O631[理学—高分子化学]