高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (7): 1373.

• 研究快报 • 上一篇    下一篇

超支化聚醚的支化度对玻璃化转变温度的影响

麦亦勇, 周永丰, 颜德岳   

  1. 上海交通大学化学化工学院, 上海 200240
  • 收稿日期:2004-03-08 出版日期:2004-07-24 发布日期:2004-07-24
  • 通讯作者: 颜德岳(1937年出生),男,教授,博士生导师,主要从事高分子化学与物理研究.E-mail:dyyan@sjtu.edu.cn E-mail:dyyan@sjtu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:50233030,20274024);上海市科学技术委员会基础处重点基金资助

Effect of Degree of Branching on Glass Transition Temperature for Hyperbranched Polyether

MAI Yi-Yong, ZHOU Yong-Feng, YAN De-Yue   

  1. Institute of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2004-03-08 Online:2004-07-24 Published:2004-07-24

摘要: 聚合物的分子结构对聚合物性能影响很大.支化度不同的同种聚合物,必须通过不同的催化体系合成,很难得到既具有相近分子量又具有不同支化度的系列聚合物样品,因此对聚合物性能与支化度的依赖关系的研究报道不多.

关键词: 聚3-乙基-3-羟甲基环氧丁烷, 支化度, 玻璃化转变温度

Abstract: The effect of the degree of branching(DB) on glass transition temperature(Tg) for a hyperbranced poly[3-ethyl-3-(hydroxymethyl)oxetane](PEHO) was measured by DSC. The results show that the Tg of PEHO decreases with the increasing DB. It is presumed that the smaller the DB of the PEHO sample, the smaller the free volume of the material, and the stronger the intermolecular interaction, which means more energy is needed to make the PEHO chains move, finally it leads to the increase of Tg.

Key words: Poly[3-ethyl-3-(hydroxymethyl)oxetane], Degree of branching, Glass transition temperature

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