側鎖型スメクチック液晶性高分子の構造と熱伝導率

抄録

ermal Conductivities (TCs) and Thermal diffusivities (TDs) of side–chain PmBEn polymer smectic (Sm) Liquid Crystals (LCs) were measured by thermal wave analysis. TDs measured for monodomain SmA1 LCs of PmBE1 are greater TDs in the LC director direction than in the transverse direction. The TD in the director direction increases with number of spacer methylene units (m) being greater for odd-m PmBE1 as back bones are confined more closely between side-chain layers. When TD is compared between polydomain LCs, the SmA1 LCs have greater TD than the SmAd LCs of PmBEn with n≧4 of the same degree of backbone confinement. These trends in the TDs of side-chain polymer Sm LCs are explained if the LCs have thermal resistances in backbones and in overlap of alkyl tails.