Dynamic mechanical and thermal behavior of novel liquid-crystalline polybutadiene-diols with azobenzene groups in side chains
2013
Abstract
Liquid-crystalline polymers containing methoxy- or butoxy-substituted azobenzene in side chains have been prepared via radical addition of the in advance synthesized nematic thiols onto double bonds of poly(butadiene)diol. In the present work, thermal behavior of these comblike polymers has been characterized by differential scanning calorimetry and polarizing optical microscopy.
LC transitions have been also determined by rheological measurement. Time–temperature superposition of mechanical functions has been successfully applied to samples undergoing direct nematic/glassy state transition.