• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >A novel crosslinking agent of polymethyl(ketoxime)siloxane for room temperature vulcanized silicone rubbers: synthesis, properties and thermal stability
【24h】

A novel crosslinking agent of polymethyl(ketoxime)siloxane for room temperature vulcanized silicone rubbers: synthesis, properties and thermal stability

机译：用于室温硫化硅氧烷橡胶的多甲基（酮）硅氧烷的新型交联剂：合成，性能和热稳定性

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

A novel cross-linker polymethyl(ketoxime)siloxane (PMKS) with dense pendant reactive groups based on polymethylhydrosiloxane (PMHS) was synthesized via dehydrocoupling reaction. The novel PMKS cross-linker was applied to a hydroxyl-terminated polydimethylsiloxane (HPDMS) matrix to prepare a series of novel RTV silicone rubbers. The chemical structure of PMKS and curing reaction between HPDMS and PMKS by hydrolytic condensation were verified by IR spectroscopy and H-1 NMR. Thermal stability and mechanical properties of these novel RTV silicone rubbers have been studied by means of thermal gravimetric analysis (TGA) and universal tensile testing machine, respectively. The results displayed that a pronounced enhancement effect of the novel cross-linker PMKS on thermal stabilities and mechanical properties of RTV silicone rubbers as compared with the traditional cross-linking agent of methyltris(methylethylketoximino)silane (MTKS). Subsequently, the degradation residues were also characterized by FT-IR and X-ray photoelectron spectrometer (XPS). It was found that the striking enhancements in thermal properties and improvements on mechanical properties could be the synergistic effect of the T-type branched structure of PMKS cross-linker, in situ formation of dense PMKS phase in the chain network by self-crosslinking and the uniform distribution of PMKS cross-linker in the HPDMS matrix.
机译：通过脱氯耦合反应合成了基于聚甲基氢硅氧烷（PMH）的致密侧硅氧烷（PMH）的新型交联剂聚甲基（Ketoxime）硅氧烷（PMK）。将新型PMKS交联剂施加到羟基封端的聚二甲基硅氧烷（HPDMS）基质中，以制备一系列新型RTV硅氧烷橡胶。通过IR光谱和H-1 NMR通过水解缩合通过水解缩合的PMK和PMK和PMK之间的PMK和固化反应的化学结构。通过热重分析（TGA）和通用拉伸试验机，研究了这些新颖的RTV硅胶橡胶的热稳定性和机械性能。结果表明，与甲基三甲基甲基丙酮（甲基乙基氧中咪唑胺）硅烷（MTK）的传统交联剂相比，新型交联剂PMK对RTV硅橡胶的热稳定性和力学性能的显着增强效果。随后，降解残留物的特征在于FT-IR和X射线光电子光谱仪（XPS）。发现热性质的引起增强和机械性能的改善可能是PMK交联剂的T型支链结构的协同效应，通过自交联和链网络中的链网络中的致密PMK阶段的原位形成PMKS交联剂在HPDMS基质中的均匀分布。

著录项

  • 来源
    《RSC Advances》 |2018年第23期|共9页
  • 作者

    Zhan Xibing; Cai Xiqing; Zhang Junying;

  • 作者单位

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Zhejiang Peoples R China;

    Beijing Univ Chem Technol Minist Educ Key Lab Carbon Fiber &

    Funct Polymers Lab Adhes &

    In Situ Polymerizat Technol Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Minist Educ Key Lab Carbon Fiber &

    Funct Polymers Lab Adhes &

    In Situ Polymerizat Technol Beijing 100029 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 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