Dependence of viscoelastic properties on spacer length and molecular weight for a side-chain liquid crystal polymer in a nematic solvent
Dependence of viscoelastic properties on spacer length and molecular weight for a side-chain liquid crystal polymer in a nematic solvent
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向列溶剂中侧链液晶聚合物的粘弹性对间隔基长度和分子量的依赖性
DOI：
10.1051/jp2:1993232
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
V. Percec
中科院分区：
文献类型：
--
作者：
D. Gu;S. R. Smith;A. Jamieson;M. Lee;V. Percec
采用光散射技术研究了表征五氰基联苯 (5CB) 与液晶聚合物 (LCP) [CH 2 CH(O[CH 2 ] m OPhCN)] n (m= 2, 3, 5, 7, 11) 的可混溶向列混合物中指向矢畸变的粘弹性参数。结果与之前的观察一致，即添加 LCP 会导致粘度相对较大的增加和弹性常数的小幅降低。研究发现，对于较长的垫片，扭曲和张开模式的粘度增量变得更小，并且在数值上与弯曲模式的粘度增量相当
The light scattering technique was used to investigate the viscoelastic parameters characterizing director distortions in miscible nematic mixtures of pentacyanobiphenyl (5CB) with the liquid crystal polymer (LCP) [CH 2 CH(O[CH 2 ] m OPhPhCN)] n (m= 2, 3, 5, 7, 11). The results agree earlier observations that the addition of the LCP causes relatively large increases in viscosities and small decreases in the elastic constants. It is found that, for longer spacers, the viscosity increments of the twist and splay modes become smaller and are numerically comparable to that of the bend mode