Synthesis and Characterization of Poly(methylsiloxane)s Containing 4-(S(-)-2-

摘要

Previous publications from our laboratory reported the synthesis andcharacterization of polymethacrylates, polyacrylates and poly(methylsiloxane)s containing 4-S(-)-2-methyl-l-butoxy-4'-(w-alkan-1-yloxy)-a-methylstilbene side groups, in which the alkanyl group contains two eleven methylenic units. Although in the field of low-molar-mass liquid crystals there are some empirical rules which are used to design compounds displaying chiral smectic C (sC*) mesophases, such rules are not available for side chain liquid crystalline polymers. A classic example comes from our laboratory where repeated attempts to synthesize side chain liquid crystalline polymers exhibiting a sC* mesophase led to polymers exhibiting a sA mesophase. Therefore, we decided to perform a series of systematic investigations aimed to derive some empirical rules useful for the molecular design of side chain liquid crystalline polymers exhibiting sC* mesophases.