• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer science, Series C >Synthesis, Structure and Properties of Poly(1-trimethylsilyl-1-propyne) Obtained with NbBr5- and TaBr5-Based Catalytic Systems
【24h】

Synthesis, Structure and Properties of Poly(1-trimethylsilyl-1-propyne) Obtained with NbBr5- and TaBr5-Based Catalytic Systems

机译：用Nbbr5和曲回型催化系统获得的聚（1-三甲基甲硅烷基-1-丙基）的合成，结构和性质

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

In this work, the polymerization of 1-trimethylsilyl-1-propyne [TMSP] using catalytic systems based on pentabromide Nb(V) and Ta(V) with organometallic cocatalysts Ph3Bi, Ph4Sn, Bu4Sn, Ph3SiH, and Et3SiH was investigated. The use of NbBr5-based catalytic systems has strongly marked cis-stereospecificity and gives highly cis-enriched poly(1-trimethylsilyl-1-propyne) [PTMSP] (content of cis-units above 70%), whereas the use of TaBr5-based catalytic systems leads to the formation of PTMSP with mixed cis-/trans-composition (content of cis-units from 50 to 65%).With increasing cis-content, solvent resistance of PTMSP increases significantly. PTMSP with a content of cis-units above 70% obtained on NbBr5-containing systems in cyclohexane acquires resistance to aliphatic and aromatic hydrocarbons, and cis-regular PTMSP obtained on NbBr5-based systems in toluene is totally insoluble in any of the organic solvents. The results of wide-angle X-ray diffraction indicate an increase in the packing density of the polymer during the transition from a mixed configuration to a cis-regular one. Durable PTMSP film membranes exhibit ultra-high permeability coefficients for individual gases (e.g., P-O2 = 8500-11000 barrer, alpha(O2/N2) = 1.5-1.9). According to the low-temperature Ar sorption, PTMSP synthesized with NbBr5- and TaBr5-based catalytic systems has high BET surface areas in the range of 870-1050 m(2)/g, high intrinsic microporosity, and higher gas permeability coefficients of PTMSP correlate with BET surface area growth.
机译：在这项工作中，研究了使用基于五宝酰胺Nb（V）和Ta（V）的催化系统的1-三甲基甲酰基-1-pharyne [TMSP]的聚合用有机金属助催化剂pH3bi，pH4sn，Bu4sn，pH3β和Et3sih。使用Nbbr5的催化系统具有强烈标记的顺式立体特异性，并提供高度顺式聚（1-三甲基甲硅烷基-1-Pharyne）[PTMSP]（顺式单位含量为70％），而使用曲折号 - 基于基于催化系统的催化系统将PTMSP形成为混合顺式/反式组合物（顺式含量为50-65％）。随着顺式含量的增加，PTMSP的耐溶剂性显着增加。具有高于70％的CIS-单元的PTMSP在环己烷中获得的NBBR5体系获得的70％获得抗脂族和芳烃的耐药性，并且在甲苯的基于Nbbr5基体系上获得的顺式常规PTMSP完全不溶于任何有机溶剂。广角X射线衍射的结果表明在从混合构态到顺式常规的转变期间聚合物的填充密度增加。耐用的PTMSP膜膜表现出用于单个气体的超高磁导率系数（例如，P-O2 = 8500-11000窝，α（O2 / N2）= 1.5-1.9）。根据低温Ar吸附，用Nbbr5和曲折的催化系统合成的PTMSP具有870-1050m（2）/ g，内在微孔高，高型微孔和PTMSP的较高气体渗透系数的高白面积区域与BET表面积生长相关。

著录项

  • 来源
    《Polymer science, Series C》 |2019年第1期|共10页
  • 作者

    Matson S. M.; Kossov A. A.; Makrushin V. P.; Levin I. S.; Zhilyaeva N. A.; Litvinova E. G.; Khotimskiy V. S.;

  • 作者单位

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

    Russian Acad Sci AV Topchiev Inst Petrochem Synth Moscow 119991 Russia;

  • 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