聚乳酸共混增韧和耐热性能的研究  

Research on Toughening and Heat Resistance of Polylactide Blends

作　　者：许鹏飞 潘宏伟[2] 张会良[2] 王冬梅[1] XU Peng-fei;PAN Hong-wei;ZHANG Hui-liang;WANG Dong-mei(College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Changchun Institute of Applied Chemistry,Chinese Academy of Science,Changchun 130022,China)

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266590 [2]中国科学院长春应用化学研究所生态环境高分子材料重点实验室,吉林长春130022

出　　处：《塑料科技》2020年第5期54-59,共6页Plastics Science and Technology

基　　金：国家重点研究与发展计划(2016YFC0501402-5);浙江省自然科学基金项目(LQY19B040001);吉林省与中国科学院科技合作产业化项目(2020SYHZ0002);中国科学院科技服务网络计划(STS计划)项目(KFJ-STS-ZDTP-082)。

摘　　要：将乙烯/甲基丙烯酸丁酯/甲基丙烯酸缩水甘油酯三元共聚物(GEBMA)和滑石粉(Talc)按不同比例加入聚乳酸(PLA)基体中,熔融共混制备PLA/GEBMA/Talc共混物。将GEBMA的质量分数固定为10%,探讨了不同含量的Talc对PLA/GEBMA/Talc共混物的力学性能、流变性能、热性能、相形态以及耐热性能的影响。结果表明:GEBMA的加入提高了PLA的韧性,冲击强度从纯PLA的4.3 kJ/m^2提高到PLA/GEBMA(90/10)的21.6 kJ/m^2。随着Talc含量的增加,PLA/GEBMA/Talc共混物的拉伸强度和冲击强度降低,弹性模量增加,PLA/GEBMA/Talc材料具有良好的力学性能。Talc起到了异相成核作用,可以提高结晶速率,减小PLA的晶体尺寸,改善了共混物的耐热性能。PLA/GEBMA/Talc材料可广泛用于可生物降解的注塑产品。Ethylene butyl methacrylate glycidyl methacrylate terpolymer(GEBMA)and talc with different proportions were added to the polylactide(PLA)matrix,and the PLA/GEBMA/Talc blends were prepared by melt blending.Fix the mass fraction of GEBMA to 10%,and the effects of different contents of Talc on the mechanical properties,rheological properties,thermal properties,phase morphology and heat resistance of PLA/GEBMA/Talc blends were investigated.The results show that the addition of GEBMA improves the toughness of PLA,the impact strength was significantly improved from 4.3 kJ/m^2 of pure PLA to 21.6 kJ/m^2 of PLA/GEBMA(90/10)blends when GEBMA was added.With the increase of talc,the tensile strength and impact strength decreased,the elastic modulus of the PLA/GEBMA/Talc blends increased.PLA/GEBMA/Talc blends have good mechanical properties.Talc plays a role of heterogeneous nucleation,which can increase the crystallization rate,reduce the crystal size of PLA,and improve the heat resistance of the blends.PLA/GEBMA/Talc blends can be widely used in biodegradable injection products.

关 键 词：聚乳酸 滑石粉 增韧 耐热性能 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]