溶液法星型聚乳酸的合成与表征  

Synthesis and Characterization of Star-Shaped Polylactide by Solution Polymerization

作　　者：刘青[1] 唐颂超[1] 王庆海[1] 

机构地区：[1]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室,上海200237

出　　处：《功能高分子学报》2009年第4期383-388,共6页Journal of Functional Polymers

基　　金：上海市重点学科和重点实验室项目资助(B50208DZ2230500)

摘　　要：探讨了采用辛酸亚锡为催化剂,多元醇及多元酸为引发剂,以溶液法制备星型聚乳酸的可行性,研究了不同引发剂对产物分子量的影响。采用核磁共振及DSC对产物进行了表征,结果表明:以溶液法合成星型聚乳酸是可行的,但与丙交酯开环聚合制备星型聚乳酸的方法相比,溶液法在产物结构和分子量控制上并不十分有效,由于反应受到多官能团核引发剂空间位阻和反应概率的影响,聚乳酸产物的结构除星型结构外也同时存在大量的线型结构。The feasibility of synthesizing star-shaped poly（lactic acid） by solution polymerization, with stannous octoate as catalyst and multi-hydroxy/carboxy compounds as initiator, was investigated. Products were characterized with ^1H-NMR and DSC analysis. Results showed that star-shaped poly（lactic acid） could be synthesized successfully by solution polymerization. Compared to that by ring opening polymerization of lactide, the controllability of structure and molecular weight in solution polymerization was less effective. An amount of linear poly（lactic acid） were existent due to the steric hindrance of star-shaped lnltlatlors.

关 键 词：聚乳酸 溶液法 星型结构 

分 类 号：O631[理学—高分子化学]