• 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 >Proton exchange membranes by grafting of styrene-acrylic acid onto FEP by preirradiation technique. I. Effect of synthesis conditions
【24h】

Proton exchange membranes by grafting of styrene-acrylic acid onto FEP by preirradiation technique. I. Effect of synthesis conditions

机译：通过预辐照技术将苯乙烯-丙烯酸接枝到FEP上的质子交换膜。一，合成条件的影响

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

Grafting of styrene-acrylic acid (sty-AA) polymer onto fluorinated ethylene propylene copolymer (FEP) was carried out by preirradiation of FEP with gamma-rays. Effect of reaction conditions on the degree of grafting such as total radiation dose, monomer concentration, temperature, and time of grafting has been studied. From the study, it is seen that the degree of grafting is strongly dependent on the reaction conditions. The rate dependence of 0.53 (similar to0.5) and 1.03 (similar to1) have been obtained with respect to total dose and monomer concentration, respectively indicating that radiation induced grafting follows free radical polymerization. The activation energy for the grafting in the temperature range of 60-90degreesC is found to be 33 kJ/mol. The results indicate that the grafting takes place by the front mechanism where the grafting starts at surface and slowly proceeds inwards by diffusion of the monomer through the swollen grafted chains. (C) 2003 Wiley Periodicals, Inc. [References: 25]
机译：通过用γ射线对FEP进行预辐射，将苯乙烯-丙烯酸（sty-AA）聚合物接枝到氟化乙烯丙烯共聚物（FEP）上。研究了反应条件对接枝度的影响，例如总辐射剂量，单体浓度，温度和接枝时间。从研究中可以看出，接枝程度很大程度上取决于反应条件。相对于总剂量和单体浓度，已经获得了0.53（近似于0.5）和1.03（近似于1）的速率依赖性，这表明自由基引发的辐射诱导接枝反应。发现在60-90℃的温度范围内用于接枝的活化能为33kJ / mol。结果表明，接枝是通过前部机理进行的，在该机理中，接枝从表面开始，并通过单体通过溶胀的接枝链扩散而向内缓慢进行。 （C）2003 Wiley Periodicals，Inc. [参考：25]

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