希夫碱钛配合物催化D,L-丙交酯本体开环合成聚乳酸  

Ring-opening polymerization of D,L-lactide to synthesize polylactic acid catalyzed by Schiff-base titanium complex

作　　者：李香[1] 胡承波[1] 傅亚[1,2] 霍润兰[1] 宁欣强[1] 王远亮[1] 

机构地区：[1]重庆大学生物工程学院生物流变科学与技术教育部重点实验室,重庆400030 [2]重庆科技学院化学与化工学院,重庆401331

出　　处：《功能材料》2011年第10期1772-1775,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(30870609);重庆市自然科学基金重点资助项目(2009BA4025);重庆市教委资助项目(KJ091415);九龙坡区科技计划资助项目(高090109)

摘　　要：合成了一种新型双核希夫碱钛配合物,并将此作为催化剂用于D,L型丙交酯本体开环聚合,采用FT-IR、NMR、GPC对合成产物进行表征,研究结果表明该配合物具有催化丙交酯开环较高的催化活性和分子量可控性(PDI=1.09～1.24)。同时进一步研究了该催化剂用量,聚合温度及聚合时间对聚合反应的影响,发现在单体与催化剂摩尔比为2600,聚合时间为16h,聚合温度为160℃时,可得到数均分子质量Mn=9.058×104,PDI=1.16的聚乳酸材料。Binuclear Schiff-base titanium complex was synthesized and used to catalysis bulk ring-opening polymerization of D,L-lactide.The synthetic products were characterized by FT-IR,NMR and GPC.The results show that this Schiff-base complex has relatively high catalytic activity and controllability of molecular weights（PDI=1.09-1.24） in catalyzing ring-opening polymerization of D,L-lactide.The effects of molar ratio of monomer and catalyst,the polymerization temperature and polymerization time on polymerization were studied in detail.In the conditions of monomer and catalyst is 2600,polymerization time is 16h,polymerization temperature is 160℃,D,L-polylactic acid with Mn=9.058×104,PDI=1.16 can be obtained.

关 键 词：希夫碱 钛 开环聚合 聚乳酸 

分 类 号：TB324[一般工业技术—材料科学与工程] R318.08[医药卫生—生物医学工程]