화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터)
권호 47권 1호
발표분야 고분자합성
제목 Synthesis and Characterization of Thermotropic Liquid Crystalline Polyesters Containing Heterocyclic Aromatic Moieties
초록 Thermotropic liquid crystalline polyesters (TLCPs) have been extensively used due to their excellent thermal resistance, mechanical strength, and chemical resistance. However, aromatic TLCPs are difficult to process due to their high melting temperature. To overcome these shortcomings, the melting temperature of TLCPs needs to be lowered by introducing kinked structures, aliphatic or flexible units, or nonlinear monomers. A 2,5-thiophene unit is a heterocyclic aromatic moiety with a nonlinear structure, which can reduce the melting temperature. In this study, a series of novel TLCPs were synthesized by melt polycondensation of 4-hydroxybenzoic acid, 2,5-thiophenedicarboxylic acid, and 4,4’-biphenol with various compositions. The chemical structure, crystalline feature, and morphology of the synthesized TLCPs were characterized with FT-IR, XRD, SEM, and POM. The thermal transition, thermal stability, and mechanical properties were analyzed using DSC, TGA, and DMA.
저자 최은지, 정영규
소속 충남대
키워드 TLCP; TDCA; BP; Melt polycondensation; Liquid crystalline
E-Mail ygjeong@cnu.ac.kr