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含萘聚芳醚酮共聚物热处理后产生自由基的ESR谱

董凤霞,郑莹光* ,牛亚明,王贵宾,姜振华*   

  1. 吉林大学分析测试实验中心, 吉林长春 130023;吉林大学化学学院, 吉林长春 130023
  • 收稿日期:2003-04-28 修回日期:2003-06-20 出版日期:2003-12-05 发布日期:2003-12-05
  • 作者简介:董凤霞(1960-),女,吉林长春人,高级工程师,从事ESR研究. *通讯联系人:郑莹光,电话:(0431)8498943,E-mail: YGZheng@mail.jlu.edu.cn.*第二通讯联系人: 姜振华.

RADICALS GENERATED FROM THERMALLY -TREATED POLY(ARYL-ETHER-KETONE) COPOLYMERS CONTAINING  1,5-NAPHTHALENE MOIETIES STUDIED BY ESR SPECTROSCOPY

DONG Feng-xia,  ZHENG Ying-guang* , NIU Ya-ming, WANG Gui-bin, JIANG Zhen-hua*   

  1. Analysis and Measurement Center Jilin University, Changchun 130023,China; Department of Chemistry Jilin University, Changchun 130023,China
  • Received:2003-04-28 Revised:2003-06-20 Online:2003-12-05 Published:2003-12-05
  • About author:*Correspondence author: Zheng Ying-guang,E-mail: YGZheng@mail.jlu.edu.cn,Tel:(0431)8498943

摘要:

萘环摩尔含量20%的聚芳醚酮(PANEK)无规共聚物在340 ℃空气条件下发生交联反应,经过不同时间的热处理后,在室温检测热处理后产生的自由基ESR谱. 它们都有一条较强的单峰,随着热处理时间的增长,自由基ESR谱的幅度增强,将微波功率加大到200 mW, 谱线发生明显的变化,出现两条重叠在一起的谱线,说明含萘环聚芳醚酮在热处理过程中产生了两种不同的自由基. 文中模拟、讨论了热处理过程中产生的两种自由基的归属,一种是RO·自由基,另一种是萘自由基,它们都参与交联反应,RO·自由基起主要作用.

关键词: 电子自旋共振,  含萘聚芳醚酮, 热处理, 交联, 自由基

Abstract:

Poly(aryl-ether-ether-ketone)copolymers containing 1,5-Naphthalene moieties have been heated at 340 ℃ in air for different time, and it has been sho
wn that crosslinks are formed under oxidative condition, causing a reduction in the crystallizability of the material. Using ESR spectroscopy, we investigated t
he radicals generated from P(EEK-co-20 mol% ENEK) random copolymers heated at 340 ℃ in air and in nitrogen in this study. The ESR spectra obtained in the process of thermal treatment were originated from two species of free radicals, namely the RO[KG-*2]\5free radicals (R\-1)  and the naphthalene free radicals (R\-2). Based on the above experimental observations, it can be concluded that both free radical species take part in the crosslinking reaction, but  R\-1 plays a more important role.

Key words: ESR, P(EEK-co-20 mol ENEK), thermally-treated, crosslinking, radical

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