• 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 >Intercalation of epoxy resin in organically modified montmorillonite
【24h】

Intercalation of epoxy resin in organically modified montmorillonite

机译：环氧树脂在有机改性蒙脱土中的嵌入

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

Various methods of preparation of epoxy resin/clay mixtures, before the addition of the crosslinking agent and curing to form epoxy-based polymer layered silicate (PLS) nanocomposites, have been investigated to determine their effect on the nanostructure. Organically modified montmorillonite clay was used, and the mixtures were prepared by both simple mixing and solvent-based methods. X-ray diffraction shows that intercalation of the resin into the clay galleries occurs for all clay loadings up to 25 wt % and for both preparation methods, but the dispersion of the clay in the resin, observed by optical microscopy, is significantly better for the solvent preparation method. Differential scanning calorimetry (DSC) shows that the intercalated resin has the same molecular mobility as the extra-gallery resin, but suggests that the intercalated resin does not penetrate completely into the galleries. Prolonged storage of the resin/clay mixtures at room temperature leads to changes in the DSC response, as well as in the response to thermogravimetry, which are interpreted as resulting from homopolymerization of the epoxy resin, catalyzed by the onium ion in the modified clay. This confirms and explains the earlier observation of Benson Tolle and Anderson (J Appl Polym Sci 2004, 91, 89) that "conditioning" of the resin/clay mixtures at ambient temperature has a significant effect when the crosslinking agent is subsequently added, and indicates that the preparation method has important consequences for the nanostructure development in the PLS nanocomposites. (c) 2006 Wiley Periodicals, Inc.
机译：在添加交联剂和固化形成环氧基聚合物层状硅酸盐（PLS）纳米复合材料之前，已经研究了各种制备环氧树脂/粘土混合物的方法，以确定它们对纳米结构的影响。使用有机改性的蒙脱石粘土，并通过简单的混合和基于溶剂的方法制备混合物。 X射线衍射表明，对于所有含量不超过25 wt％的粘土和两种制备方法，树脂均会插入到粘土通道中，但是通过光学显微镜观察，粘土在树脂中的分散性明显更好。溶剂制备方法。差示扫描量热法（DSC）表明，插层树脂具有与画廊外树脂相同的分子迁移率，但是表明插层树脂没有完全渗透到画廊中。树脂/粘土混合物在室温下长时间储存​​会导致DSC响应以及对热重分析的响应发生变化，这被解释为是由于改性粘土中的鎓离子催化了环氧树脂的均聚。这证实并解释了Benson Tolle和Anderson的早期观察（J Appl Polym Sci 2004，91，89），当随后添加交联剂时，在室温下“调节”树脂/粘土混合物具有显着的效果，并表明制备方法对PLS纳米复合材料的纳米结构发展具有重要意义。 （c）2006年Wiley Periodicals，Inc.

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