A series of main‐chain liquid‐crystalline polymers (LCPs) with pendant sulfonic acid groups have been synthesized by use of biphenyl‐4,4′‐diol, 6,7‐dihydroxynaphthalene‐2‐sulfonic acid, and bis(4‐(chlorocarbonyl)phenyl) decanedioate in a one‐step esterification reaction. Emeraldine base form of polyaniline (PAN) is doped by the synthesized sulfonic acid‐containing LCPs to obtain PAN–LCP ionomers. A series of electrorheological (ER) fluids are prepared using the synthesized PAN–LCP ionomers and silicone oil. The chemical structure, liquid‐crystalline behavior, dielectric property of LCPs, and PAN–LCP ionomers, and ER effect of the ER fluids are characterized by use of various experimental techniques. The synthesized sulfonic acid‐containing LCPs and PAN–LCP ionomers display nematic mesophase. The PAN–LCP ionomers show a slight elevation of glass transition temperatures and decrease of enthalpy changes of nematic–isotropic phase transition compared with corresponding sulfonic acid‐containing LCPs. The relative permittivity of the PAN–LCP ionomers is much higher than that of the corresponding sulfonic acid‐containing LCPs. The ER effect of the PAN–LCP ionomer dispersions is better than PAN dispersions, suggesting a synergistic reaction should be occurred among liquid crystalline component, and PAN part under electric fields. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3395–3403, 2013

中文翻译：

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含聚苯胺单元的磺化盐型液晶离聚物的合成，表征和电流变效应

通过使用联苯-4,4'-二醇，6,7-二羟基萘-2-磺酸和bis（4-（在一步式酯化反应中将癸二酸氯羰基）苯基）脱去。聚苯胺（PAN）的翡翠碱形式被合成的含磺酸的LCP掺杂以获得PAN-LCP离聚物。使用合成的PAN-LCP离聚物和硅油制备了一系列电流变（ER）流体。通过使用各种实验技术来表征LCP和PAN-LCP离聚物的化学结构，液晶行为，介电性能以及ER流体的ER效应。合成的含磺酸的LCP和PAN-LCP离聚物显示向列中间相。与相应的含磺酸LCP相比，PAN-LCP离聚物的玻璃化转变温度略有升高，向列-各向同性相变的焓变降低。PAN-LCP离聚物的相对介电常数比相应的含磺酸LCP的相对介电常数高得多。PAN-LCP离聚物分散体的ER效果优于PAN分散体，表明在电场作用下，液晶组分和PAN部分之间应发生协同反应。©2013 Wiley Periodicals，Inc. J. Appl。Polym。科学 130：3395-3403，2013年 PAN-LCP离聚物的相对介电常数比相应的含磺酸LCP的相对介电常数高得多。PAN-LCP离聚物分散体的ER效果优于PAN分散体，表明在电场作用下，液晶组分和PAN部分之间应发生协同反应。©2013 Wiley Periodicals，Inc. J. Appl。Polym。科学 130：3395-3403，2013年 PAN-LCP离聚物的相对介电常数比相应的含磺酸LCP的相对介电常数高得多。PAN-LCP离聚物分散体的ER效果优于PAN分散体，表明在电场作用下液晶组分和PAN部分之间应发生协同反应。©2013 Wiley Periodicals，Inc. J. Appl。Polym。科学 130：3395-3403，2013年