The Negative Thixotropic Behaviour of MontmorHlonite and Hydrolyzed Polyacrylamide System
Chen Zong-Qi;Xin Yin-Chang;Li Xiao-Zheng;Lu Cheng-Xue Department of Chemical Engineering, Qingdao Institute of Chemical Technology, Qingdao
In the course of a study on the change in the fiuidity and thixotropy of montmori-
llonite suspension by added hydrolyzed polyacryamide, it was noticed that some of them
displayed unusual thixotropic behaviour in that they showed in their natural state a
negative thixotropy; in other words,the fluidity of the suspension increased with time.
This negative thixotropic behaviour of this system was time-dependent, as can be seen
from Figure 1 (Chinese Text) and they show clockwise hysteresis loops. The consistency
of the suspension has a considerable influence on this unusual behaviour and additions
of salts destroy the ability of the materials to build up a structure possessing a"negative
thixotropic" behaviour.
【Fund】：
国家自然科学基金
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