首页> 外文会议>International workshop on positron and positronium chemistry >Depth profile of chemical composition and free volume of polyurethane-urea/clay nanocomposite
【24h】

Depth profile of chemical composition and free volume of polyurethane-urea/clay nanocomposite

机译:化学成分和自由体积的聚氨酯 - 尿素/粘土纳米复合材料的深度曲线

获取原文

摘要

Depth profile of subsurface chemical composition and free volume in segmented polyurethane-urea/clay nanocomposites was studied by angle resolved X-ray photoelectron spectroscopy (ARXPS) and Doppler broadening energy spectroscopy (DBES) using slow positron beam. The ARXPS studies revealed increasing N/C atomic ratio (hard segment to soft segment ratio) at any given depth for the clay loaded samples compared to the neat polymer. DBES study revealed significant microstructure modification with clay loading. Self segregation of hard and soft segments in neat polymer and their interspersing with clay loading was observed from DBES measurements.
机译:通过角度分辨的X射线光电子能谱(ARXPS)和多普勒展宽能谱(DBES)研究了地下化学成分的深度曲线和分段聚氨酯 - 尿素/粘土纳米复合材料中的使用慢朗环梁。与整齐的聚合物相比,ARXPS研究表明,在粘土加载样品的任何给定深度下,在任何给定深度下揭示了N / C原子比(硬链段)。 DBES研究显示了粘土载荷显着的微观结构改性。从DBES测量中观察到整洁聚合物中坚硬和软链段的自偏析及其与粘土载荷的散射。

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