새로운 측사슬 액정고분자의 합성과 물성과 관한 연구(1) -스피로 아세탈 Moiety의 메소겐 단위로써의 가능성-

Synthesis and Properties of New Side Chain Liquid Crystalline Polymer (I) -Potential of Spiroacetal Moiety as a Mesogen Unit-

Copolyspiroacetals were synthesized by interfacial polycondensation from 3, 9-bis(4-hydroxyphenyl)-2, 4, 8, 10-tetraoxaspiroundecane(SAB) and 4, 4'-biphenol(BP) with sebacoyl chloride. These copolymers were soluble in polar solvent such as phenol/tetrachloroethane and sulfuric acid, and exibited good thermal stability. But they did not exhibit thermotropic mesophases. The structures of spiroacetal moiety were observed by computer-aided-modeling that had two types of conformational isomers and not linear and/or not planar conformations.