...
首页> 外文期刊>Polymers for advanced technologies >Study on the multiple cyclization reactions and the formed structures in poly(acrylonitrile-co-itaconic acid) copolymers during thermal treatment
【24h】

Study on the multiple cyclization reactions and the formed structures in poly(acrylonitrile-co-itaconic acid) copolymers during thermal treatment

机译:热处理期间多环化反应与聚(丙烯腈 - 共衣酸)共聚物中的形成结构研究

获取原文
获取原文并翻译 | 示例
           

摘要

The present work provided some in-depth understanding on the role of itaconic acid (IA) in the structural evolution of poly(acrylonitrile-co-itaconic acid) (PAI) polymers and the formed cyclic structures during thermal treatment. As the increasing content of IA, the cyclization initiated by the ionic mechanism increased with the less -amino nitrile formed and the higher extent of cyclization. The IA comonomer initiated multiple cyclization reactions, namely, the first ionic cyclization and the second ionic cyclization, by the jump transportation of activation species between different PAI chains during thermal treatment. The times of the jump transportation of activation species was about two or three at 250 degrees C. The presence of IA comonomer promoted the formation of long sequence cyclic structures rather than isolated cyclic structure under non-oxidative condition. The thermal stability of PAI was improved by the more and better cyclic structures and the crosslinking structures caused by the jump transportation of activation species, which reasonably resulted in a better graphitic lattice during the carbonization. Copyright (c) 2017 John Wiley & Sons, Ltd.
机译:本作者对衣康酸(IA)在热处理期间,对聚(丙烯腈 - 共衣酸)(PAI)聚合物和所形成的环状结构的结构演变的作用提供了一些深入的了解。作为Ia的增加,由离子机制引发的环化随着形成的含量较少,环化程度较高。通过在热处理期间不同PAI链之间的激活物种的跳转运输,IA共聚单体引发了多个环化反应,即第一离子环化和第二离子环化。在250℃下,活化物种的跳转运输时间约为2或三个。在非氧化条件下,Ia共聚单体的存在促进了长序列环状结构的长序列循环结构,而不是分离的环状结构。通过越来越好的循环结构和由活化物种的跳转运输引起的交联结构的热稳定性得到改善,其在碳化期间合理地导致更好的石墨晶格。版权所有(c)2017 John Wiley&Sons,Ltd。

著录项

  • 来源
    《Polymers for advanced technologies》 |2017年第12期|共8页
  • 作者单位

    Changchun Univ Technol Sch Chem Engn Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun 130012 Jilin Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业(高聚物工业);
  • 关键词

    PAN; structural evolution; Raman spectroscopy; carbon fibers;

    机译:平底锅;结构演变;拉曼光谱;碳纤维;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号