RHEOLOGICAL PROPERTIES OF POLY(VINYL ALCOHOL)/SODIUM BORATE AQUEOUS-SOLUTIONS

被引:67
作者
INOUE, T
OSAKI, K
机构
[1] Institute for Chemical Research, Kyoto University, Uji, Kyoto
关键词
POLY(VINYL ALCOHOL); TEMPORARY NETWORK; SHEAR THICKENING;
D O I
10.1007/BF00369071
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Rheological properties were studied for aqueous solutions of poly(vinyl alcohol) containing sodium borate. The solution exhibited a marked shear thickening at a certain critical rate of shear, gamma(C) and the flow was unstable at higher rates of shear. The loss modulus exhibited a maximum and the angular frequency corresponding to the maximum, omega(max), was approximately equal to gamma(C). These features were common to several measurements including various molecular weights and concentrations of polymer and various temperatures. Possible mechanism of shear thickening was discussed based on a temporary network model composed of crosslink points of a finite lifetime.
引用
收藏
页码:550 / 555
页数:6
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