• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Synthesis and characterization of poly(carbonates) and poly(thiocarbonates) derived from diphenols containing germanium as a central atom
【24h】

Synthesis and characterization of poly(carbonates) and poly(thiocarbonates) derived from diphenols containing germanium as a central atom

机译：由以锗为中心原子的二酚衍生的聚碳酸酯和聚硫代碳酸酯的合成与表征

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

Poly(carbonates) and poly(thiocarbonates), containing germanium in the main chain and derived from the diphenols bis(4-hydroxyphenyl)-dimethyl-germane, bis(4-hydroxyphenyl)-diethyl-germane, and bis(4-hydroxyphenyl)-dibutyl-germane reaction with phosgene and thiophosgene, respectively. The products were synthesized under phase transfer conditions, using two phase transfer catalysts. The products were characterized by spectroscopic methods. The results were evaluated by the yields and eta(inh) values which showed different behaviors for poly(carbonates) and poly(thiocarbonates). The yields and the eta(inh) values for the poly(carbonates) were low due to a hydrolytic process when the NaOH concentration was increased. For the poly(thiocarbonates) the phase transfer was effective and also there was an increase of both parameters when the NaOH concentration was increased, due to a salting out effect.
机译：在主链中含有锗且衍生自双酚双（4-羟苯基）-二甲基锗烷，双（4-羟苯基）-二乙基锗烷和双（4-羟苯基）的聚碳酸酯（聚碳酸酯）和聚碳酸酯（硫代碳酸酯） -二丁基-锗烷与光气和硫光气的反应。使用两种相转移催化剂在相转移条件下合成产物。产物通过光谱法表征。通过收率和η（inh）值评估了结果，这些收率和eta（inh）值显示了聚碳酸酯和聚硫代碳酸酯的不同行为。当增加NaOH浓度时，由于水解过程，聚碳酸酯的收率和eta（inh）值较低。对于聚（硫代碳酸酯），相转移是有效的，并且由于盐析效应，当NaOH浓度增加时，两个参数也增加。

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