高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (12): 1974.

• 论文 • 上一篇    下一篇

电子束辐照交联CB/HDPE凝胶复合物的阻温特性

张剑锋1, 郑强1, 曹苏华1, 益小苏1,2   

  1. 1. 浙江大学高分子科学与工程学系, 杭州 310027;
    2. 先进复合材料国防重点实验室, 北京 100095
  • 收稿日期:1999-02-02 出版日期:1999-12-24 发布日期:1999-12-24
  • 通讯作者: 郑强
  • 作者简介:张剑锋,男,26岁,博士研究生.
  • 基金资助:

    国家“863”重点基金(批准号:715-007-0080);国家自然科学基金(批准号:59673020)资助课题

Resitivity-temperature Characteristics of CB/HDPE Gel Composites Formed Under Electron Beam Irradiation

ZHANG Jian-Feng1, ZHENG Qiang1, CAO Su-Hua1, YI Xiao-Su1,2   

  1. 1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China;
    2. National Key Laboratory of Advanced Composites, Beijing 100095, China
  • Received:1999-02-02 Online:1999-12-24 Published:1999-12-24

摘要: 对电子束辐照交联并经溶剂抽提得到的炭黑/高密度聚乙烯(CB/HDPE)凝胶复合物的阻温特性进行了研究.结果表明,凝胶复合物与未抽提的交联试样和未交联试样相比,其PTC强度显著增大,并伴有明显的NTC现象.经热冷循环后,表现出很好的阻温特性稳定性,并且NTC现象消失.表明阻温特性的稳定性及NTC现象的消除强烈依赖于CB/HDPE导电复合材料凝聚态结构的稳定性

关键词: 炭黑/高密度聚乙烯导电复合材料, 凝胶, 电子束辐照, 交联, 阻温特性

Abstract: Resistivity-temperature characteristics of CB/HDPE composites crosslinked by irradiation of electron beam were studied. The results showed that CB/HDPE gel composites, which were generated through extraction by xylene for crosslinked samples, exhibited much higher PTCintensity and distinctive NTCeffect during the first heating-cooling cycle. But much better stability of resistivity as well as diminished NTC effect were observed when the composites was exposed to heating-cooling cycles subsequently. The phenomena observed above were related to the structure stability of the gel, suggesting that crosslinking of the polymeric matrix is an effective method to stabilize conductivity and alleviate NTCeffect for polymer composites filled with conductive particles.

Key words: Carbon black/high density polyethylene conductive composites, Gel, Electron beam irradiation, Crosslinking, Resistivity-temperature characteristics

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