Dynamic soft elasticity in monodomain nematic elastomersA. Hotta and E.M. Terentjev
Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, UK email@example.com
(Received 24 July 2002 / Published online: 29 April 2003)
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 . However, the time-temperature superposition did not work through the clearing point , 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 . This law agrees very well with the results of static stress relaxation, where each relaxation curve obeys the analogous power law in the corresponding region of long times and temperatures.
83.80.Va - Elastomeric polymers.
61.30.-v - Liquid crystals.
83.85.Vb - Small amplitude oscillatory shear (dynamic mechanical analysis).
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2003