Jf. Mano et al., MOLECULAR MOTIONS OF SIDE-CHAIN LIQUID-CRYSTALLINE POLYMERS IN THE LIQUID-CRYSTALLINE PHASE STUDIED BY THE THERMALLY STIMULATED CURRENTS TECHNIQUE, Polymer, 35(16), 1994, pp. 3561-3564
In the present work the thermally stimulated currents technique was us
ed to study the upper glass transition relaxations in two side-chain l
iquid crystalline polysiloxanes. The nature of those relaxations at th
e molecular level is a controversial subject, but our results lead us
to suggest thay they correspond to the reorientational motions in the
liquid crystalline phase of the longitudinal and transverse components
of the dipole moment of the mesogenic side group. This assignment is
compatible with the conclusions from extensive studies of the dipolar
relaxation behaviour of side-chain liquid crystalline polymers by diel
ectric relaxation spectroscopy.