Fibrillation of liquid crystalline polymer in polysulfone promoted by increased system elasticity via adding nano-silica

被引：22
作者：
Chen, Jun
Chen, Peng
Wu, Lichuan
Zhang, Jun
He, Jiasong [1 ]
机构：
[1] Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Key Lab Engn Plast,BNLMS, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
POLYMER | 2007年 / 48卷 / 14期
关键词：
polysulfone; liquid crystalline polymers (LCP); nano-SiO2;
D O I：
10.1016/j.polymer.2007.05.004
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ternary blends composed of a liquid crystalline polymer (LCP), nano-SiO2 and polysulfone (PSF) were prepared by melt blending. Very long and perfectly oriented LCP fibrils were in situ formed in capillary flows by adding 5 vol% of nano-SiO2 to binary PSF/LCP blend. Dynamic rheology analysis indicated that the sharp increase of elasticity was caused by higher content of nano-SiO2. Then the entrance angle was decreased and elongational stress increased when the polymer melt flowed through the abrupt contraction, which resulted in the fibrillation of LCP in PSF/LCP/nano-SiO2 system. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4242 / 4251
页数：10
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