Measurement of the full refractive index tensor in sheared liquid-crystalline polymer solutions
Measurement of the full refractive index tensor in sheared liquid-crystalline polymer solutions
复制标题
剪切液晶聚合物溶液中全折射率张量的测量
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
W. Burghardt
中科院分区：
文献类型：
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作者：
K. Hongladarom;W. Burghardt
用组合光学技术测量了聚(γ-谷氨酸苄酯)在间甲酚中剪切液晶溶液的全折射率张量。在所研究的所有剪切速率下，平均分子取向方向与流动方向成2度以内。在低剪切速率滚动区，取向角为正，符合Larson-Doi多域模型。随着剪切速率的增加，取向角改变符号，与DOI分子模型预测的从滚流到流动排列的转变一致
The full refractive index tensor of sheared liquid crystalline solutions of poly(γ-benzylglutamate) in m-cresol has been measured using a combination of optical techniques. At all shear rates studied, the average molecular orientation direction is within 2 deg of the flow direction. In the low shear rate tumbling regime, the orientation angle is positive, in agreement with the Larson-Doi polydomain model. As shear rate is increased, the orientation angle changes sign, consistent with a transition from tumbling to flow alignment, as predicted by the Doi molecular model