화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2019년 봄 (05/01 ~ 05/03, 부산 벡스코(BEXCO))
권호 23권 1호
발표분야 고분자_포스터
제목 Molecular Engineering of Main-Chain Liquid Crystal Elastomers: The Impact of Spacer Length on Thermal, Mechanical and Actuation Properties
초록 Liquid crystal elastomers (LCEs) are a class of smart materials renowned for their reversible shape transformation under heat, light and solvent. In the thermotropic LCEs, the contraction parallel to the director orientation occurs when heated above nematic-isotropic temperature (Tni). we report the synthesis of a series of surface aligned LCEs prepared by aza-Michael addition between diacrylate functionalized nematic monomers and alkylamine chain extenders followed by photopolymerization. In particular, we used the spacer length of nematic monomers as a handle to manipulate thermal, mechanical and rheological as well as actuation properties of the resulting LCEs. Specifically, both Tni and actuation temperature significantly reduce with decreasing methylene spacer from 11 to 3. Thus, molecular engineering of the LC monomers can bring a significant impact on the actuation behavior of the LCEs, which can advance in the design of programmed shape switching materials.
저자 궈위엔항, 이지은, 안석균
소속 부산대
키워드 Liquid Crystal Elastomers; actuator
E-Mail