聚乙二醇改性聚乳酸的研究  

STUDY ON POLY(LACTIC ACID) MODIFIED BY POLYETHYLENE GLYCOL

作　　者：宋谋道[1] 朱吉亮[1] 张邦华[1] 郝广杰[1] 周庆业[1] 张莹[1] 赵芬芝[1] 赵英奇[2] 杨世强[2] 范玉玲[2] 

机构地区：[1]南开大学高分子化学研究所吸附分离功能高分子材料国家重点实验室 [2]天津医科大学第一中心医院

出　　处：《高分子学报》1998年第4期454-458,共5页Acta Polymerica Sinica

基　　金：天津市卫生局基金

摘　　要：将丙交酯（ＤＬＬＡ）与聚乙二醇（ＰＥＧ）共聚得到了一系列高分子量的共聚物．用ＩＲ、１ＨＮＭＲ和ＤＭＡ对它的结构和粘弹性进行了表征，并测定了其力学性能，同时对材料在加工过程中特征粘度的变化也进行了研究．结果表明，ＰＥＧ与ＬＡ的共聚物是一种三嵌段结构ＨＯＰＬＡＰＥＧＰＬＡＯＨ．当ＰＥＧ含量增加时，强度下降，伸长率增加，共聚物逐渐由脆性向韧性转变。The structure and properties of the triblock copolymer HOPLAPEGPLAOH prepared by lacide (DLLA) and polyethylene glycol(PEG, M=4000) with various composition ratios, were studied by FTIR spectroscopy, 1HNMR spectroscopy, dynamic mechanical analysis(DMA). The effect of temperature and pressure in processing on intrinsic viscosity of block copolymer was also studied. The experiment results indicated that the tensile strength and glass transition temperature decreased with the increasing of the content of PEG, however, degradable rate increased with the increasing of the content of PEG for block copolymer. The general properties of PLA were improved obviously by PEG. The properties of triblock copolymer are controlled more easily than PLA polymer, which can be used in the cure urethranarrowing.

关 键 词：生物降解材料 聚乳酸 聚乙二醇 共聚物 改性 

分 类 号：TQ342.9[化学工程—化纤工业]