聚乙二醇/聚乳酸/环氧化天然橡胶热塑性弹性体的性能研究  

Properties of PEG/PLA/ENR TPV

作　　者：姜刚 陈玉坤[2] 丁剑平[1] 方跃胜[1] JIANG Gang;CHEN Yukun;DING Jianping;FANG Yuesheng(South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510641 [2]华南理工大学先进弹性体实验室,广东广州510641

出　　处：《橡胶工业》2021年第4期249-253,共5页China Rubber Industry

基　　金：国家自然科学基金资助项目(51973067)。

摘　　要：采用动态硫化技术制备聚乙二醇(PEG)/聚乳酸(PLA)/环氧化天然橡胶(ENR)热塑性弹性体(TPV),对其性能进行研究。结果表明:PEG对TPV表现出良好的增韧效果,TPV的断裂伸长率和冲击强度随着PEG用量的增大明显提高,PEG用量为10份时TPV的断裂伸长率由16%提高至321%,冲击强度由30.6 kJ·m^(-2)提高至53.6 kJ·m^(-2),而拉伸强度、拉伸模量和弯曲强度均有一定程度的降低;PEG主要分布在PLA基体中,PEG能大幅降低PLA的玻璃化温度,提高其结晶能力;TPV在拉伸过程中沿着应力方向产生塑性形变。The properties of polyethylene glycol(PEG)/polylactic acid(PLA)/epoxidized natural rubber(ENR)thermoplastic vulcanizate(TPV)prepared via dynamic vulcanization were studied.The results showed that PEG exhibited an excellent toughening effect on TPV.With the increasing of PEG amount,the elongation at break and impact strength of the TPV increased significantly.When PEG amount was 10 phr,the elongation at break increased from 16%to 321%,and the impact strength increased from 30.6 kJ·m^(-2) to 53.6 kJ·m^(-2).Meanwhile,the tensile strength,tensile modulus and bending strength of the TPV decreased to some extent.PEG was mainly distributed in the PLA matrix,and it could greatly reduce the glass transition temperature of PLA and improve its crystallization ability.The TPV produced plastic deformation along the stress direction during the stretching process.

关 键 词：聚乳酸 环氧化天然橡胶 聚乙二醇 热塑性弹性体 生物基 动态硫化 增韧 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业] TQ334