高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (7): 1378.

• 研究简报 • 上一篇    下一篇

PEEK-PEDEK嵌段共聚物非等温结晶动力学研究

王汉夫, 赵晓刚, 刘新才, 陈梁, 王力风, 陈春海, 吴忠文   

  1. 吉林大学化学学院, 长春 130023
  • 收稿日期:2004-04-21 出版日期:2004-07-24 发布日期:2004-07-24
  • 通讯作者: 陈春海(1969年出生),男,博士,教授,从事精细化工研究.E-mail:cch@mail.jlu.edu.cn E-mail:cch@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20104003);“九七三”计划项目(批准号:G2003CB615604)资助

Nonisothermal Crystallization Kinetics of PEEK-PEDEK Block Copolymer

WANG Han-Fu, ZHAO Xiao-Gang, LIU Xin-Cai, CHEN Liang, WANG Li-Feng, CHEN Chun-Hai , WU Zhong-Wen   

  1. College of Chemistry, Jilin University, Changchun 130023, China
  • Received:2004-04-21 Online:2004-07-24 Published:2004-07-24

PDF (PC)

被引次数

13

摘要： PEEK以其优异的热稳定性和耐溶剂性被广泛应用在航空航天和电子电气等领域[1].经过增强后的PEEK长期使用温度(UL温度指数)可达523 K.但在温度高于523 K的情况下,模量下降较快,这在一定程度上限制了其应用.在PEEK的分子链上引入刚性较强地联苯基团,可以有效的提高分子链的刚性,使聚合物的玻璃化转变温度得以提高[2,3].我们曾合成了一系列含有刚性单体联苯二酚的嵌段共聚物,并对其热性能进行了研究[4],本文着重对这一系列共聚物的非等温结晶动力学进行研究.

关键词: 聚醚醚酮(PEEK), 嵌段共聚物, 非等温结晶动力学

Abstract: The nonisothermal crystallization kinetics of PEEK-PEDEK block copolymers was studied and the results showed that the Avrami exponent n of each sample was generally larger than 3, which indicates the initial crystallization of the complex. The crystallization behavior could be described as heterogeneous, multi-dimensional spherical growth with thermal nucleation. The activation energy was calculated and was explained with the constitution changes of the molecular chains that caused by the introduction of biphenyl moiety.

Key words: PEEK, Block copolymer, Nonisothermal crystallization kinetics

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