高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (12): 2312.

• 论文 • 上一篇    下一篇

生物可降解共聚物聚丁二酸/对苯二甲酸丁二醇酯(PBST)的序列结构及结晶性研究

郭宝华, 丁慧鸽, 徐晓琳, 徐军, 孙元碧   

  1. 清华大学材料科学与工程研究院, 化工系高分子研究所, 北京 100084
  • 收稿日期:2002-09-18 出版日期:2003-12-24 发布日期:2003-12-24
  • 通讯作者: 郭宝华(1963年出生),男,副教授,主要从事环境友好高分子材料和聚合物凝聚态结构的研究.E-mail:bhguo@mail.tsinghua.edu.cn E-mail:bhguo@mail.tsinghua.edu.cn
  • 基金资助:

    清华大学基础研究基金资助

Studies on the Sequence Structure and Crystallinity of Poly(butylene succinate) Copolymers with Terephthalic Acid

GUO Bao-Hua, DING Hui-Ge, XU Xiao-Lin, XU Jun, SUN Yuan-Bi   

  1. Institute of Polymer Science & Engineering, Department of Chemical Engineering, School of Materials Science & Engineering, Tsinghua University, Beijing 100084, China
  • Received:2002-09-18 Online:2003-12-24 Published:2003-12-24

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被引次数

137

摘要： 制备了高分子量的聚丁二酸丁二醇酯,并通过与对苯二甲酸二甲酯的无规共聚调节其生物可降解性及力学性能,得到了具有优良机械性能和不同生物降解速度的一系列共聚物,并对共聚物序列结构、热力学性能、结晶性进行了研究.结果表明,该共聚物为无规共聚物,PBS和PBT分别结晶.共聚物的结晶熔点符合无规共聚物的Flory方程.

关键词: 聚丁二酸丁二醇酯(PBS), 聚丁二酸对苯二甲酸丁二醇酯(PBST), 缩合聚合, 序列结构, 结晶性

Abstract: Aseries of high molecular weight polyesters, poly(butylene succinate)(PBS) and poly(butylene succinate-co-terephthalate)s(PBST), were obtained from succinic acid and/or dimethyl terephthalate reacting with 1,4-butanediol through a polycondensation process in the presence of a highly effective catalyst. The compostions and physical properties of both homopolyesters and copolyesters were investigated by 1HNMR, gel permeation chromatography(GPC), differential scanning calorimetry(DSC), dynamic mechanical thermal analyzer(DMA), X-ray analysis and tensile test. Their number-average molecular weights are in the range of 1.25×104-3.09×104.The effect of copolymer composition on the thermal properties was investigated. The incorporation of rigid aromatic segments into aliphatic polyester was used for improving mechanical properties. Especially, the elongations at break(>500%) of the copolyesters(PBST) were much greater than that(80%) of the homopolyester(PBS).The results suggest that PBSTis a random copolyester and it has crystallinity in all the terephthalic acid contents.

Key words: Poly(butylene succinate)(PBS), Poly(butylene succinate-co-terephthalate)s(PBST), Polycondensation, Sequence structure, Crystallinity

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