Department of Physics, Presidency University, 86/1 College Street, Kolkata 700 073, India.
J Chem Phys. 2012 Apr 14;136(14):144902. doi: 10.1063/1.3702943.
A phenomenological model is developed to describe the isotropic-smectic-C phase transition in liquid-crystalline side-chain elastomers. We analyze the influence of external mechanical stress on the isotropic-smectic-C phase transition. While this phase transition is first order in low-molecular-weight materials, we show here that the order of this transition does not change in liquid-crystalline elastomers. The temperature dependence of the heat capacity and the nonlinear dielectric effect in the isotropic phase above the isotropic-smectic-C phase transition in liquid crystalline elastomers are calculated. The theoretical results are found to be in good agreement with experiment.
本文建立了一个唯象模型来描述液晶侧链弹性体的各向同性-向列-C 相转变。我们分析了外机械应力对向列-C 相转变的影响。虽然在低分子材料中，该相转变是一级相变，但我们在此表明，在液晶弹性体中，该转变的顺序并没有改变。计算了液晶弹性体中各向同性-向列-C 相转变上方各向同性相的热容和非线性介电效应随温度的变化。理论结果与实验吻合较好。
