• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS Macro Letters >Brittle-to-Ductile Transition of Sulfonated Polystyrene Ionomers
【24h】

Brittle-to-Ductile Transition of Sulfonated Polystyrene Ionomers

机译：磺化聚苯乙烯离聚物的脆性转变转变

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study examines the brittle-to-ductile transition of sulfonated polystyrene ionomers (SPS) with different counterions. The polystyrene precursor was unentangled and had two ionic groups per chain on average. Thus, its terminal relaxation time was comparable to the lifetime of the associating ionic groups. Three types of ionomer samples were used to tune the association lifetime: (1) fully neutralized SPS with different alkali-metal counterions, (2) fully neutralized SPS with mixed sodium and cesium counterions, and (3) partially neutralized SPS with sodium or cesium counterions. For all three systems, the brittle-to-ductile transition could be represented by a diagram of two Weissenberg numbers, Wi and Wi(R), defined with respect to the terminal and Rouse relaxation times, respectively. A flowable region existed at sufficiently low Wi, independent of Wi(R). At higher Wi, a brittle-to-ductile transition of the ionomer melt occurred above a critical value of Wi(R). To achieve ductility during the application of rapid elongational flow, the Rouse-type motions should be sufficiently slow relative to the rate of ion-dissociation, so that the strain-induced breakup of the ionic cross-links would not cause very strong chain retraction that may further lead to the macroscopic fracture.
机译：None

著录项

  • 来源
    《ACS Macro Letters》 |2021年第4期|共7页
  • 作者

    Liu Shuang; Cao Xiao; Huang Chongwen; Weiss R. A.; Zhang Zhijie; Chen Quan;

  • 作者单位

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys &

    Chem Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys &

    Chem Changchun 130022 Peoples R China;

    Univ Akron Dept Polymer Engn Akron OH 44325 USA;

    Univ Akron Dept Polymer Engn Akron OH 44325 USA;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys &

    Chem Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys &

    Chem Changchun 130022 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
  • 关键词

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