Electrorheological properties of a type-I immiscible polymer blend: Scaling and structural changes
Electrorheological properties of a type-I immiscible polymer blend: Scaling and structural changes
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I 型不混溶聚合物共混物的电流变特性：结垢和结构变化
DOI：
10.1122/1.550974
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
A. Inoue
中科院分区：
文献类型：
--
作者：
H. Orihara;Y. Hosoi;Kozo Tajiri;Y. Ishibashi;M. Doi;A. Inoue
我们研究了 I 型不混溶聚合物共混物的电流变特性，其中液晶聚合物液滴在无电场下分散在聚二甲基硅氧烷中。我们测量了混合物在不同温度下施加的不同电场下的流动曲线，并对结构进行了光学观察。在流动曲线中发现了两个异常，表明应该存在三种不同的结构，按照剪切速率增加的顺序将其指定为N、A和B。 A的粘度远高于B和N。通过光学观察表明，A和B在一定的剪切速率范围内共存，并且它们之间存在明显的界限。在 A 中，我们发现了流量曲线中的比例关系和无量纲数 Mn'，它是表征 A 状态的唯一参数。
We studied the electrorheological properties of a type-I immiscible polymer blend, in which droplets of liquid crystalline polymers are dispersed in a polydimethylsiloxane under no electric field. We measured flow curves of the blend at various applied electric fields under various temperatures, and made optical observations of the structure. Two anomalies were found in the flow curve, indicating that there should be three different structures, which are designated as N, A, and B in the order of increasing shear rate. A is much higher than B and N in viscosity. By optical observations it was clarified that A and B coexist in a certain range of shear rate and there is a sharp boundary between them. In A we found a scaling relation in the flow curve and a dimensionless number Mn′, which is the only one parameter characterizing the state of A.