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首页> 外文期刊>Journal of Applied Polymer Science >Steady viscosity of a polymer/liquid crystal biphasic system
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Steady viscosity of a polymer/liquid crystal biphasic system

机译：聚合物/液晶双相体系的稳定粘度

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Steady shear viscosities of blends of poly(butyl acrylate) and cholesteryl oleyl carbonate were studied under a cone and plate fixture. Unique shear behavior was observed for the polymer/low molar mass liquid crystal mixture. The viscosity of the liquid crystal-rich phase increases with polymer content until a maximum is reached. The height of the viscosity maximum decreases with the magnitude of the shear stress and disappears when the stress reaches 200 Pa. Addition of liquid crystal to the polymer-rich phase causes a viscosity reduction, and at higher stress levels, the viscosity reduction becomes more effective with the same amount of liquid crystal addition. The viscosity reduction may be related to the fibril morphology of the liquid crystal and the viscosity maximum can be interpreted by the emulsion effect being counteracted by a viscosity reduction effect. A shear-thickening behavior was observed in the intermediate shear rates for the blends with a volume fraction of poly(butyl acrylate) between 9.4 and 49.8%. This is a novel liquid-liquid system that exhibits a shear thickening behavior. (C) 2004 Wiley Periodicals, Inc. [References: 42]
机译：在锥板固定装置下研究了聚丙烯酸丁酯和碳酸胆固醇酯油酸酯共混物的稳态剪切粘度。对于聚合物/低摩尔质量液晶混合物观察到独特的剪切行为。富含液晶的相的粘度随着聚合物含量的增加而增加，直到达到最大值。粘度最大值的高度随着剪切应力的大小而减小，并且在应力达到200 Pa时消失。在富聚合物相中添加液晶会导致粘度降低，并且在较高的应力水平下，粘度降低会更加有效与相同数量的液晶添加。粘度降低可能与液晶的原纤维形态有关，并且可以通过由粘度降低作用抵消的乳液效应来解释最大粘度。在具有百分之9.4至49.8％的聚（丙烯酸丁酯）的体积分数的共混物中，在中等剪切速率下观察到剪切增稠行为。这是一种新型的液-液系统，具有剪切增稠行为。 （C）2004 Wiley Periodicals，Inc. [参考：42]

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