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 Tni. However, the time-temperature superposition did not
work through the clearing point Tni, due to change 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' ~ omega^a. This law agrees very well with the
results of static stress relaxation, where each relaxation curve obeys the
analogous power law G' ~ t^{-a} in the corresponding region of long times and
temperatures.Comment: Latex, [epj]{svjour} style, 9 pages 11 figures submitted to Euro.
Phys. J.
