Presentation Information
[8a-PB2-6]Liquid Crystalline Phase and Thermal Conductive Properties in Side-Chain Liquid Crystal Polymer and Blends with Ether Spacer
〇(B)Ayano Matsusaki1, Yuya ISHIZAKI2, Shusaku NAGANO1 (1.Rikkyo Univ., 2.Shinshu Univ.)
Keywords:
Liquid crystalline polymer,Ether Spacer,Specific heat capacity
In this study, we synthesized two liquid crystalline (LC) homopolymers with azobenzene (Az) and cyanobiphenyl (CB) side chains containing an ether spacer. The synthesized LC polymer adopted smectic phases. The glass transition temperature of the LC polymer with the ether spacer is approximately more than 10°C lower compared with that of the alkylene spacer. These indicate that the ether spacer separates the mobility of the main chain and side chains, thereby enhancing the mobility of the main chain. LC polymer with the CB mesogen and ether spacer exhibited relatively high specific heat capacity and thermal diffusivity. Furthermore, the LC homopolymer blend formed the smectic E phase, a highly ordered liquid crystal phase. These results indicate that the introduction of ether spacers is effective in controlling molecular mobility and liquid crystal order.