含离子液体基元的PEG线型齐聚物对PLA结晶行为的影响  

Influence of linear PEG oligomer with ionic liquid segment on the crystallization behavior of poly(lactic acid)

作　　者：李煜[1] 张迪[1] 胡亚东[1] 杨善中[1] 丁运生[1,2] 

机构地区：[1]合肥工业大学化学与化工学院,合肥230009 [2]先进功能材料与器件安徽省重点实验室,合肥230009

出　　处：《化工新型材料》2016年第6期208-210,共3页New Chemical Materials

基　　金：国家自然科学基金资助项目(51373045)

摘　　要：制备了含离子液体基元的聚乙二醇(PEG)线型齐聚物(LIL)与聚乳酸(PLA)的共混物,并采用差示扫描量热仪(DSC)和偏光显微镜(POM)研究了LIL对PLA结晶动力学和晶体结构的影响。DSC测试结果表明,LIL提高了PLA的结晶速率。POM结果显示,随着共混物中LIL含量的增加,PLA在单位时间内形成晶核的数量明显减少,但球晶半径随时间的变化率逐渐增大,说明LIL对PLA的成核有一定的抑制作用,但可以促进PLA球晶的生长。A series of linear PEG oligomer with ionic liquid segment（LIL）/poly（lactic acid）blends were prepared via solution blending.Effects of LIL on the crystallization kinetics and crystal morphology developing of PLA were investigated by DSC and POM.The results determined by DSC showed that the parameter of t1/2 based on Avrami equation decreased with the increasing of LIL content in LIL/PLA blends,which confirmed the LIL could accelerate the crystallization process of PLA.The results of POM showed that the nucleation density decreased,while the growthing rate of spherulites of PLA increased with increasing the concentration of LIL in LIL/PLA blends.

关 键 词：聚乳酸 结晶 离子液体 

分 类 号：O633.14[理学—高分子化学]