• 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 >Flame retardant polyurethane nanocomposite: Study of clay dispersion and its synergistic effect with dolomite
【24h】

Flame retardant polyurethane nanocomposite: Study of clay dispersion and its synergistic effect with dolomite

机译：阻燃聚氨酯纳米复合材料：粘土分散及其与白云石的协同作用研究

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

Polyurethane-clay nanocomposite adhesives were prepared by different synthetic routes and their microstructures were determined by X-ray diffraction measurements and from transmission electron microscopy images. The preparation method of the polyurethane nanocomposite adhesives was systematically changed, that is, condensation either in the presence or absence of catalyst, concentration and type of nanoclay, premixing order of nanoclay (nanoclay was either premixed with the polyol or isocyanate part) and by using MDI surface treated nanoclays. Depending on the polymerization conditions cluster, intercalated, and exfoliated clay structures were obtained. The flame retardant properties of the manufactured nanocomposite adhesives and the synergistic effect of clay in combination with dolomite were investigated by cone calorimeter and UL 94 vertical burning tests. The results indicate that addition of nanoclay reduces burning time and the total heat evolved (THE) at flame out, and that the type of assembled clay structure (cluster, intercalated or exfoliated) had a significant effect on the flame retardant property. Nanocomposites with 3 wt % of clay loading gave the shortest burning time, the lowest THE and also UL 94 V-2 ratings were reached, although the flame retardancy in terms of heat release rate and time to ignition was not improved.
机译：通过不同的合成路线制备聚氨酯粘土纳米复合胶粘剂，并通过X射线衍射测量和透射电子显微镜图像确定其微观结构。聚氨酯纳米复合胶粘剂的制备方法得到系统地改变，即在有或没有催化剂的情况下缩合，纳米粘土的浓度和类型，纳米粘土的预混合顺序（纳米粘土与多元醇或异氰酸酯部分预混合）并通过MDI表面处理的纳米粘土。取决于聚合条件，获得插层和剥离的粘土结构。通过锥形量热仪和UL 94垂直燃烧试验研究了所制备的纳米复合胶粘剂的阻燃性能以及粘土与白云石的协同作用。结果表明，纳米粘土的加入减少了燃烧时间，并减少了火焰熄灭时的总热量（THE），并且组装的粘土结构的类型（团簇，插层或剥落）对阻燃性能有显着影响。粘土含量为3 wt％的纳米复合材料的燃烧时间最短，THE和UL 94 V-2额定值最低，尽管在热释放率和着火时间方面的阻燃性没有得到改善。

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