• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Effects of Wood Fiber and Microclay on the Performance of Sot Based Polyurethane Foams
【24h】

Effects of Wood Fiber and Microclay on the Performance of Sot Based Polyurethane Foams

机译：木纤维和微粘土对油基聚氨酯泡沫性能的影响

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

Abstract Various polyurethane (PU) foams were prepared by in situ reaction of isocyanate and soy-based polyol. The effects of wood fiber and microclay on the foam morphologies, mechanical properties and thermal behaviors of PU foams were investigated. NCO index had fundamental impacts on the influences of wood fiber and microclay on the performance of PU foams. The reinforcement behavior of flexible foams was different to that of both semi-rigid and rigid foams. Both fiber and microclay improved the com-pressive strength at a high NCO index of 140-250, and contributed to relative high decomposition temperatures. Unlike the compressive strength, the tensile strength was decreased due to the amount of hard polyurea formation from secondary reactions at the highest NCO level. In addition, wood fiber had different reinforcement mechanism from microclay. Wood fiber desired to form chemical bonds during foaming while microclay had potential to form physical insertions. This difference was expressed by the change of their thermal degradation temperature.
机译：摘要通过异氰酸酯与大豆基多元醇的原位反应制备了各种聚氨酯泡沫。研究了木纤维和微粘土对聚氨酯泡沫的形态，力学性能和热行为的影响。 NCO指数对木纤维和微粘土对PU泡沫性能的影响具有根本影响。柔性泡沫的增强性能不同于半刚性和刚性泡沫。纤维和微粘土都在140-250的高NCO指数下提高了抗压强度，并导致了相对较高的分解温度。与抗压强度不同，由于在最高NCO水平下由二次反应形成的硬质聚脲数量增加，抗拉强度降低。另外，木纤维的增强机理与微粘土不同。木纤维希望在发泡过程中形成化学键，而微粘土具有形成物理插入物的潜力。这种差异通过其热降解温度的变化来表示。

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