Cicuta P, Tajbakhsh A R, Terentjev E M
Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom.
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 May;65(5 Pt 1):051704. doi: 10.1103/PhysRevE.65.051704. Epub 2002 Apr 29.
We subject a monodomain cholesteric liquid crystal elastomer to uniaxial strain perpendicular to its helical axis and study the response of its texture to deformation. A combination of mechanical, optical, and x-ray scattering measurements confirms the prediction for the director rotation, coarsening, and then unwinding the cholesteric helix. The study of optical absorption of circularly polarized light quantifies the complex dependence of the photonic band-gap structure on strain and directly relates to the microscopic deformation of elastomer. Agreement is found with the recently proposed theoretical prediction of the photonic structure of cholesteric elastomers.
我们对单畴胆甾相液晶弹性体施加垂直于其螺旋轴的单轴应变，并研究其织构对变形的响应。机械、光学和X射线散射测量相结合，证实了关于指向矢旋转、粗化以及随后胆甾相螺旋解开的预测。对圆偏振光的光吸收研究量化了光子带隙结构对应变的复杂依赖性，并直接与弹性体的微观变形相关。研究结果与最近提出的胆甾相弹性体光子结构的理论预测相符。
