低能电子束辐射改性聚乳酸-聚乙二醇共聚物及其力学性能  

The Mechanical Properties of PLA-PEG Copolymers Modified by Low Energy Electron Beams Irradiation

作　　者：唐文睿[1] 缪培凯[1] 曾科[1] 周柯[1] 唐艳[1] 王宜鹏[1] 周鸿飞[1] 刘韬[1] 杨刚[1] 

机构地区：[1]四川大学高分子学院-NHVC电子线应用研究中心高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2008年第5期92-95,共4页Polymer Materials Science & Engineering

基　　金：日本日新电机NHVC国际合作项目(06H079)

摘　　要：通过熔融缩聚法制备了具有良好成膜性的聚乳酸-聚乙二醇共聚物(PLEG),并采用低能电子束辐射改性PLEG薄膜,研究了辐射剂量对其拉伸性能和断裂伸长率的影响。结果表明,当加入3%的三聚氰酸三烯丙酯(敏化剂TAC),以80 kGy的剂量辐射后,5#和6#PLEG薄膜的综合力学性能达到最佳,凝胶率分别为54.3%和73.9%,拉伸强度为12.3 MPa和20 MPa,断裂伸长率为283%和29%。Two kinds of PLA-PEG copolyrners （PLEG） with favorable filming ability were prepared by melt polycondensation. Then low energy electron beams was used for the modification of PLEG films, the effects of irradiation dose on tensile intensity and elongation at break of PLEG films were studied. The results indicate that PLEG films have optical gel fraction and mechanical properties at 80 kGy in the presence of 3% triallylcyanurate as polyfunctional monomer for cross-linking. The gel fraction is 54.3 % and 73.9 %, the tensile intensity is 12.3 MPa and 20 MPa, the elongation at break is 283 % and 29 %, respectively.

关 键 词：聚乳酸-聚乙二醇共聚物 辐射改性 低能电子束 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]