• 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 >Highly Thermally Stable Novolac Derivatives and Their Properties in Epoxy Composites
【24h】

Highly Thermally Stable Novolac Derivatives and Their Properties in Epoxy Composites

机译：环氧树脂复合材料中的高热稳定性酚醛清漆衍生物及其性能

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

Two diazo-coupling novolac derivative resins (carbonyl phenyl azo novolac resin and carbonyl phenol-biphenylene azo novolac resin) were used as flame retardants. The cured resins exhibited elevated glass-transition temperatures from 115 degrees C (blank) to 195 and 167 degrees C, respectively. The char yield at 800 degrees C was increased, which elaborated the effectiveness of flame retardancy with evaluated limiting oxygen indices around 36 to 40. This was mainly attributed to the increased crosslink densities and highly aromatic contents in the modified phenol novolac derivative resins, which exhibited higher thermal degradation energies. Furthermore, the more effective flame retardancy was expected because of the loss of nitrogen during combustion. Through the evaluation of the cooperative flame retardancy in the organic/inorganic hybrid with char yield and increasing limiting oxygen index percentage, the effects of the filler showed cooperative flame retardancy only with the appropriate addition and with a difference in the crosslinking densities.
机译：两种重氮偶合酚醛清漆衍生物树脂（羰基苯基偶氮酚醛清漆树脂和羰基苯酚-联苯基偶氮酚醛清漆树脂）用作阻燃剂。固化的树脂分别显示出从115℃（空白）到195和167℃的升高的玻璃化转变温度。 800℃时的炭收率提高了，从而提高了阻燃性的有效性，评估的极限氧指数约为36至40。这主要归因于改性苯酚酚醛清漆衍生物树脂中交联密度的提高和芳烃含量的提高，表现出更高的热降解能。此外，由于燃烧过程中损失了氮，因此期望有更有效的阻燃性。通过评估有机/无机杂化物的协同阻燃性，其炭产量和增加的极限氧指数百分比，填料的效果仅在添加适当的交联密度时才显示出协同阻燃性。

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