Unique clay orientation in the injection-molded bar of isotactic polypropylene/clay nanocomposite
Unique clay orientation in the injection-molded bar of isotactic polypropylene/clay nanocomposite
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等规聚丙烯/粘土纳米复合材料注塑棒中独特的粘土取向
DOI：
10.1016/j.polymer.2006.08.022
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发表时间：
2006-09
期刊：
影响因子：
4.6
通讯作者：
Zhang, Qin
中科院分区：
文献类型：
--
作者：
Chen, Erqiang;Yang, Hong;Fu, Qiang;Zhao, Ping;Wang, Ke;Du, Rongni;Liang, Si;Yu, Zhenqiang;Zhang, Qin
本文采用动态保压注射成型（DPIM）方法制备了不同粘土含量的等规聚丙烯/有机粘土纳米复合材料的注射制品。取向的微观结构，包括层状纳米粒子和PP薄片已通过二维WAXS分析沿着样品厚度的模塑棒检查。根据粘土含量和样品厚度，可以观察到具有平行于模制棒表面的单平面轴向取向的纳米颗粒的各种取向的粘土结构，或者围绕模制棒的流动轴部分翻滚，或者甚至随机取向。纳米颗粒的取向行为可以暂时解释为层状纳米颗粒对剪切变形的敏感响应和相邻纳米片之间存在的静电吸引力辅助粘土网络的结构恢复的结果。
In this article, the injection-molded bars of isotactic polypropylene/organoclay nanocomposite with different clay contents have been obtained via dynamic packing injection molding (DPIM). The oriented microstructure including layered nanoparticles and PP lamellae has been inspected through 2D-WAXS analyses along the sample thickness of the molded bars. Depending on the clay content and sample thickness, various oriented clay structures with nanoparticles uniplanar-axially oriented parallel to the surface of molded bar, or partially tumbled around the flow axis of the molded bar, or even a random orientation, could be observed. The observed orientation behavior of nanoparticles could be temporarily elucidated as the results of the sensitive response of layered nanoparticles to shear deformation and the structural recovery of clay network assisted by the electrostatic attraction existing between adjacent nanoplatelets.
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