Chunqing ZHANG
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链转移剂对D,L-乳酸聚合的影响
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Indexed by:期刊论文

Date of Publication:2005-03-25

Journal:合成树脂及塑料

Included Journals:PKU、ISTIC、Scopus

Volume:22

Issue:2

Page Number:38-41

ISSN No.:1002-1396

Key Words:聚乳酸;丙交酯;聚合;辛酸亚锡;月桂醇

Abstract:采用两步法合成了聚D,L-乳酸,即以D,L-乳酸为原料,先制得高纯度聚合单体丙交酯,再以辛酸亚锡为引发剂,月桂醇为链转移剂(即相对分子质量调节剂),高真空条件下开环聚合制得了一系列不同相对分子质量的乳酸均聚物.分别以引发剂用量、链转移剂用量、聚合温度和聚合时间为因素进行正交实验设计,确定了制备较高相对分子质量聚乳酸的反应条件:辛酸亚锡质量分数为0.1%,月桂醇质量分数为0.04%,聚合温度为130℃,聚合时间为10 h.在170℃下,考察了链转移剂用量对聚乳酸相对分子质量的影响,得到了聚乳酸相对分子质量与链转移剂用量的定量关系式.用凝胶渗透色谱、红外光谱、核磁共振氢谱等对聚乳酸的结构和性质进行了表征.

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Gender:Male

Alma Mater:Dalian University of Technology

Degree:Doctoral Degree

School/Department:Dept. of Polymer Materials

Discipline:Polymer Materials. Polymer Chemistry and Physics. Chemistry and Chemical Engineering of Functional

Business Address:Chemical Experiment Building A303, West Campus

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