Dynamic soft elasticity in monodomain nematic elastomers

We study the linear dynamic-mechanical response of monodomain nematic liquid crystalline elastomers under shear in the geometry that allows the director rotation. The aspects of time-temperature superposition are discussed at some length and Master Curves are obtained between the glassy state and the nematic transition temperature T-ni. However, the time-temperature superposition did not work through the clearing point T-ni, due to the transition from the soft-elasticity nematic regime to the ordinary isotropic rubber response. We focus on the low-frequency region of the Master Curves and establish the power law dependence of the modulus G' proportional to w(a). This law agrees very well with the results of static stress relaxation, where each relaxation curve obeys the analogous power law G' proportional to t(-a) in the corresponding region of long times and temperatures.