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High performance liquid crystalline physical gels prepared by side chain liquid crystalline polymers
Polymer ( IF 4.1 ) Pub Date : 2018-04-09 , DOI: 10.1016/j.polymer.2018.04.027
Jianhang Zhao , Yongjie Yuan , Lei Chen , Ye Li , Hailiang Zhang

Liquid crystalline physical gels (LCPGs) with stable mechanical properties and fast electro-optical response properties were prepared through the self-assembly of side chain liquid crystalline polymers (SCLCPs) with different spacer length poly [ω-4′-cyano-(1, 1′-biphenyl)] acrylate (PmACB, m is the spacer length of SCLCP, m = 0, 2, 4) as gelators in a nematic liquid crystal, 4-pentyl-4′-cyanobiphenyl (5CB). The gel-sol phase transition temperature (TGS), micro morphology, mechanical properties and electro-optical properties of LCPGs (SCLCPs/5CB) were systematically studied. The results show that only P0ACB can form stable liquid crystalline physical gels in 5CB and show excellent thermal stability, good self-supporting ability and fast electro-optical response properties. The TGS of 6 wt% P0ACB/5CB gel is 192 °C, and it also showed stable mechanical properties, its storage modulus is about 1.0 × 104 Pa. The threshold voltage (Vth) and saturation voltage (Vsat) of P0ACB/5CB gel with 3 wt% concentration are 0.29 V μm−1and 3.906 V μm−1 respectively, and the off state response time is only 6.748 ms. Moreover, the addition of the polymer does not affect the electro-optical response of the LCPGs.



中文翻译:

由侧链液晶聚合物制备的高性能液晶物理凝胶

通过具有不同间隔长度的聚[ω-4'-氰基-(1,在向列型液晶4-戊基-4'-氰基联苯(5CB)中作为胶凝剂的1'-联苯)]丙烯酸酯(PmACB,m为SCLCP的间隔基长度,m = 0、2、4)。系统地研究了LCPG(SCLCPs / 5CB)的凝胶-溶胶相变温度(T GS),微观形貌,力学性能和电光性能。结果表明,只有POCAB才能在5CB中形成稳定的液晶物理凝胶,并具有出色的热稳定性,良好的自支撑能力和快速的电光响应特性。T GS6 wt%的P0ACB / 5CB凝胶的熔点为192°C,并且还显示出稳定的机械性能,其储能模量约为1.0×10 4 Pa。P0ACB / 5CB 的阈值电压(V th)和饱和电压(V sat)浓度为3 wt%的凝胶分别为0.29 Vμm -1和3.906 Vμm -1,并且关闭状态响应时间仅为6.748 ms。此外,聚合物的添加不会影响LCPG的电光响应。

更新日期:2018-04-09
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