• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Preparation ofMT-type polysiloxane containing active vinyl groups with low hydroxyl group content
【24h】

Preparation ofMT-type polysiloxane containing active vinyl groups with low hydroxyl group content

机译：制备含有低羟基含量的活性乙烯基的MT型聚硅氧烷

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

MT-type polysiloxanes containing active vinyl group were prepared under acid conditions initiated from divinyltetramethyldisiloxane and methyltrimethoxysilane by one-pot method, co-hydrolysis method, and reaction-rectification coupling method, respectively. The influence of different methods on molecular weight, molecular weight distribution, and ratios of each kind of segment in the MT-type polysiloxane containing active vinyl group were discussed in detail. The results indicated that with the reaction-rectification coupling method, the residual hydroxyl segment in the prepared MT-type polysiloxane could be lower than 0.5 wt%. For MT-type polysiloxanes with high hydroxyl group content, the hydroxyl content could be reduced when treated with hexamethyldisilazane, trimethylchlorosilane, zinc naphthalate, or tetramethylammonium hydroxide under suitable conditions. Hexamethyldisilazane was the most convenient and effective regents among these four compounds, the residual hydroxyl content contained in the prepared MT-type polysiloxanes could be reduced from 13.4 to 0.9 wt% when MT-type polysiloxane sample was treated with hexamethyldisilazane.
机译：以二乙烯基四甲基二硅氧烷和甲基三甲氧基硅烷为原料，分别采用一锅法、共水解法和反应精馏耦合法在酸性条件下制备了含活性乙烯基的MT型聚硅氧烷。详细讨论了不同方法对含活性乙烯基的MT型聚硅氧烷的分子量、分子量分布和各种链段的比例的影响。结果表明，采用反应精馏偶合法，制备的MT型聚硅氧烷中的残留羟基含量可低于0.5 wt%。对于羟基含量高的MT型聚硅氧烷，在合适的条件下，用六甲基二硅氮烷、三甲基氯硅烷、萘酸锌或四甲基氢氧化铵处理可以降低羟基含量。在这四种化合物中，六甲基二硅氮烷是最方便、最有效的试剂，当用六甲基二硅氮烷处理MT型聚硅氧烷样品时，所制备的MT型聚硅氧烷中的残余羟基含量可从13.4 wt%降低到0.9 wt%。

著录项

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