The rheological properties of weak gels of poly(vinyl alcohol) and sodium borate

被引：51
|
作者：
Robb, ID [1 ]
Smeulders, JBAF [1 ]
机构：
[1] UNIV CAMBRIDGE, CAVENDISH LAB, POLYMERS & COLLOIDS GRP, CAMBRIDGE CB3 0HE, ENGLAND
来源：
POLYMER | 1997年 / 38卷 / 09期
关键词：
poly(vinylalcohol); gel; viscoelasticity; relaxation times;
D O I：
10.1016/S0032-3861(96)00755-0
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The aim of this work was to establish whether the lifetime of the junction zones in the poly(vinyl alcohol)/borate gels depended on the chemical composition or concentration of the constituents. It was found that the maximum in the distribution of lifetimes was about 0.3 s and independent of the polymer, borate concentrations and of the degree of hydrolysis of the polymer. The gels changed their non-linear rheological behaviour with age, being strain softening when freshly prepared but strain hardening after a few days. This change in behaviour was attributed to a redistribution of borate ions with time. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码：2165 / 2169
页数：5
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