Clarke S M, Tajbakhsh A R, Terentjev E M, Warner M
Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom.
Phys Rev Lett. 2001 Apr 30;86(18):4044-7. doi: 10.1103/PhysRevLett.86.4044.
We report a combined theoretical and experimental study of linear viscoelastic response in oriented monodomain nematic elastomers. The model predicts a dramatic decrease in the dynamic modulus in certain deformation geometries in an elastic medium with an independently mobile internal degree of freedom, the nematic director with its own relaxation dynamics. Dynamic mechanical measurements on monodomain nematic elastomers confirm our predictions of dependence on shear geometry and on nematic order, and also show a very substantial mechanical loss clearly associated with director relaxation.
我们报告了一项关于取向单畴向列弹性体线性粘弹性响应的理论与实验相结合的研究。该模型预测，在具有独立可移动内部自由度的弹性介质（即具有自身弛豫动力学的向列指向矢）中，某些变形几何结构下动态模量会急剧下降。对单畴向列弹性体的动态力学测量证实了我们关于其对剪切几何结构和向列序依赖性的预测，并且还显示出与指向矢弛豫明显相关的非常显著的机械损耗。
