Enhanced fibrillation of LCP by CaCO3 whisker in polysulfone matrix through increasing elongational stress

被引：35

作者：

Chen, Jun

Chen, Peng

Wu, Lichuan

Zhang, Jun

He, Jiasong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci,Inst Chem, Key Lab Engn Plast,Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China

[2] Chinese Acad Tradit Chinese Med, Grad Sch, Beijing 100039, Peoples R China

来源：

POLYMER | 2006年 / 47卷 / 15期

关键词：

polysulfone; liquid-crystalline polymers (LCP); whisker;

D O I：

10.1016/j.polymer.2006.05.044

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

Induced by different fillers, various hydrodynamic effects enhance the fibrillation of liquid crystalline polymer (LCP) in in situ hybrid composites. Through choosing CaCO3 whisker as the filler and polysulfone (PSF) as the matrix, the effect of the filler size and the affinity between components on the morphological evolution of LCP droplets has been investigated. In contrast to the spherical or ellipsoidal droplets of LCP formed in binary PSF/LCP blends, the fibrillation of LCP was promoted by the introduction of whisker particles in all ternary blends at shear rates studied. The analysis of the flow field indicated that the predominant factors promoting the fibrillation of LCP were the vortex enhanced and elongational stress increased by the whisker in the converging flow area at the entrance of capillary, rather than the viscosity ratio and capillary number. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：5402 / 5410

页数：9

共 50 条

[1]

MECHANICAL-PROPERTIES OF IN-SITU COMPOSITES BASED ON PARTIALLY MISCIBLE BLENDS OF GLASS-FILLED POLYETHERIMIDE AND LIQUID-CRYSTALLINE POLYMERS [J].