L-丙交酯和聚L-乳酸的制备与性能  

THE PREPARATION AND PROPERTIES OFL-LACTIDE AND POLY(L-LACTIDE)

作　　者：娄玲[1] 尹静波[2] 高战团[2] 梁奇志[2] 董丽松[2] 陈学思[2] 景遐斌[2] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室 [2]上海大学材料学院,上海201800

出　　处：《高分子材料科学与工程》2003年第2期72-75,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目 ( 5 0 1730 2 7)

摘　　要：从左旋 L-乳酸经高温催化反应得到低聚 L-乳酸 ,再经高温裂解减压蒸馏制得单体 L-丙交酯( LL A) ,理论收率高达 80 %以上。LL A经纯化 ,再以辛酸亚锡为催化剂开环聚合得到聚 L-丙交酯 (聚 L-乳酸 ,PLLA) ,其粘均分子量可达到 4 0万。The monomer L-lactide was prepared by d ec omposing the low molecular weight polylactic acid which was synthesized from ind ustrial L-lactic acid (80% solution) catalyzed at high reaction temperature. Th e L-lactide purified by vacuum distillation and recrystallization of crude L-l actide was polymerized to poly-L-lactide (PLLA) through the ring-opening poly merization catalyzed by tin(Ⅱ) octoate (Sn(Oct) 2). The viscosity average mole cular weight of PLLA reached 4×105. The monomer of L-lactide was analyzed by DSC, gas chromatography, optical instrument and NMR to give the experimental da ta of melting point, content, optical activity. The molecular weight of PLLA, me chanical properties, thermodynamic parameters were also discussed in the paper.

关 键 词：生物降解材料 L-丙交酯 聚L-乳酸 制备 性能 

分 类 号：TQ324.9[化学工程—合成树脂塑料工业]