高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

双端羟基预聚物扩链制备高分子量聚对二氧环己酮

杨科珂, 曾襁, 汪秀丽, 朱小兰, 周艳, 王玉忠   

  1. 四川大学化学学院降解与阻燃高分子材料研究中心, 成都 610064
  • 收稿日期:2007-05-21 修回日期:1900-01-01 出版日期:2007-11-10 发布日期:2007-11-10
  • 通讯作者: 王玉忠

Preparation of Poly(p-dioxanone) with High Molecular Weight from Dihydroxyl Terminated Prepolymers Using HDI as Chain Extender

YANG Ke-Ke, ZENG Qiang, WANG Xiu-Li, ZHU Xiao-Lan, ZHOU Yan, WANG Yu-Zhong*   

  1. Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China
  • Received:2007-05-21 Revised:1900-01-01 Online:2007-11-10 Published:2007-11-10
  • Contact: WANG Yu-Zhong

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被引次数

14

摘要： 以1,4-丁二醇(BD)为引发剂, 辛酸亚锡为催化剂, 引发对二氧环己酮(PDO)开环聚合, 得到双端羟基型聚对二氧环己酮预聚物, 再以六亚甲基二异氰酸酯(HDI)为扩链剂制备高分子量的聚对二氧环己酮. 采用核磁共振谱对预聚物和扩链产物的结构进行了确认, 并详细考察了各种因素对扩链反应的影响. 研究结果表明, 加入适量的HDI, 于150 ℃反应60 min, 扩链效率在预聚物基础上可提高52倍, 而扩链产物的粘均分子量可达到25.7×104 g/mol.

关键词: 聚对二氧环己酮, 1,4-丁二醇, 六亚甲基二异氰酸酯, 扩链

Abstract: Poly(p-dioxanone)(PPDO) is one of most promising biodegradable materials, however its application was restricted because the rigorous synthetic condition and longer reaction time were needed in order to obtain products with a high molecular weight by common ring-opening polymerization. In this work, a new approach was developed by chain extending of dihydroxyl-terminated PPDO prepolymer(HPPDO) using hexamethylenediisocyanate(HDI) as the chain extender in order to obtain high molecular weight PPDO in a short time. HPPDO was prepared by ring-opening polymerization of p-dioxanone(PDO) catalyzed by SnOct2 and initiated by 1,4-butanediol(BD). The results obtained show that HPPDO prepolymers can react with Hexamethylenediisocyanate effectively, and the molecular weights of the resulting chain-extended products increase several decade times in less than one hour compared with the prepolymers. The highest viscosity-average molecular weight of the resulting polymer can reach 257000 g/mol. Both the prepolymer and the chain extended product were characterized by 1H NMR.

Key words: Poly(p-dioxanone), 1,4-Butanediol, Hexamethylenediisocyanate, Chain extending

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