高分子量L 型聚乳酸的合成与表征

上海大学学报(自然科学版) ›› 2013, Vol. 19 ›› Issue (4): 336-339.

高分子量L 型聚乳酸的合成与表征

徐红1, 张宝华2, 滕翠青3, 余木火3

(1. 东华大学化学化工与生物工程学院, 生态纺织教育部重点实验室, 上海201620;
2. 上海大学环境与化学工程学院, 上海200444;
3. 东华大学材料科学与工程学院, 纤维材料改性国家重点实验室, 上海201620)

出版日期:2013-08-27 发布日期:2013-08-27
通讯作者: 徐红(1968—), 女, 副研究员, 博士, 研究方向为生物降解有机高分子材料及其复合材料的设计与实现.E-mail: hxu@dhu.edu.cn
作者简介:徐红(1968—), 女, 副研究员, 博士, 研究方向为生物降解有机高分子材料及其复合材料的设计与实现.E-mail: hxu@dhu.edu.cn
基金资助:
国家自然科学基金资助项目(21074021)

Synthesis and Characterization of High Molecular Weight Poly L-lactic Acid

XU Hong, ZHANG Bao-hua, TENG Cui-qing, YU Mu-huo

(1. Key Laboratory of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry,
Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China;
2. School of Enviornmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science
and Engineering, Donghua University, Shanghai 201620, China)

Online:2013-08-27 Published:2013-08-27

摘要/Abstract

摘要： 提供了一种制备高分子量聚乳酸的有效方法. 首先, 将L-乳酸单体和少量己二酸直接缩聚, 制得一定分子量、分子两端为羧基的聚乳酸预聚物; 然后, 与四氢邻苯二甲酸二缩水甘油酯（711环氧树脂）进行扩链反应, 制得高分子量聚乳酸. 研究了711 环氧树脂与聚乳酸预聚物的扩链反应条件对最终产物聚乳酸分子量的影响, 发现在压力小于70 Pa, 温度为180^oC, 711环氧树脂与聚乳酸预聚物的摩尔比为1.2∶1 时, 所得的聚乳酸分子量可达150 000以上. 另外, 采用FTIR, 1H-NMR 对扩链反应产物的结构进行了表征.

关键词: 环氧树脂, 聚乳酸, 扩链, 预聚物

Abstract: An effective method to prepare high molecular weight poly L-lactic acid (PLLA) is reported. In this new process, a low molecular weight carboxyl terminated prepolymer was synthesized via polycondensation of L-lactic acid and a little adipic acid, and then the molecular weight was increased by a chain-extending reaction using 711 epoxy resin as a chain extender. The effect of synthetic condition, such as reaction temperature and content of the chain extender, on the molecular weight of PLLA was discussed. The average molecular weight was up to 150 000 at an optimum synthetic condition. 1H-NMR and FTIR were used to characterize the polymers and the results indicated that high molecular weight PLLA was synthesized by the reaction between epoxy groups at the end of 711 epoxy resin and carboxyl end groups of PLLA prepolymer.

Key words: chain extension, epoxy resin, poly L-lactic acid (PLLA), prepolymer

中图分类号:

TQ 323

徐红1, 张宝华2, 滕翠青3, 余木火3. 高分子量L 型聚乳酸的合成与表征[J]. 上海大学学报(自然科学版), 2013, 19(4): 336-339.

XU Hong, ZHANG Bao-hua, TENG Cui-qing, YU Mu-huo. Synthesis and Characterization of High Molecular Weight Poly L-lactic Acid[J]. Journal of Shanghai University（Natural Science Edition）, 2013, 19(4): 336-339.

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