扩链剂改性聚乳酸性能  

Properties of Chain Extender Modified Poly( lactic acid)

作　　者：孙静[1] 韦良强[1] 徐国敏[1] 徐定红[1] 

机构地区：[1]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料》2015年第6期1-4,共4页Plastics

基　　金：贵阳市白云区科技计划(白科合同[2014]17号);贵州省优秀科技教育人才资金(黔省专合字201225号);贵州省省长基金(黔省专合字[2012]25号)

摘　　要：通过熔融共混方法,采用ADR-4368扩链剂对聚乳酸(PLA)进行改性研究,研究扩链剂的加入量对PLA力学性能、熔体流动速率(MFR)、DSC、TG、熔体强度的影响。结果表明:扩链剂的加入提高了PLA的拉伸强度、弯曲强度、热稳定性能,熔融温度以及熔体强度,随着扩链剂质量分数的增加,PLA的拉伸强度及热稳定性逐渐提高;扩链剂的加入使PLA的熔体流动速率、冷结晶温度和结晶度下降。Chain extender ADR4368 modified poly （lactic acid） was prepared by melt blending, the addition effect of chain extender on the mechanical properties, melt flow rate, DSC ,TG and melt strength of PLA was studied. The results showed that the addition of chain extender improved the tensile strength, thermal stabilities, melting temperature and melt strength of PLA, with the increasing of chain extender content, the tensile strength,bend strength, thermal stabilities and melt strength of PLA gradually improved. The melt flow rate, cold crystallization temperatures and erystallinities of PLA reduced when added chain extender into PLA.

关 键 词：聚乳酸 扩链剂 热稳定性 改性研究 熔体强度 

分 类 号：Q946.816[生物学—植物学]