摘要
A liquid crystalline block copolymer (BCPE) was synthesized from bis phenol A epoxy oligomer and liquid crystalline polyester (PBHT) which was prepared from polyhexamethylene bis (4 oxybenzoates) and terephthaloyl dichloride by solution polymerization.The intrinsic viscosity ( η inh ) of the polymers was determined using an ubbelohde viscometer in phenyl hydroxide/1,1,2,2 tetrachloroethane mix solvent (1:1) at 30℃, and the results showed that the η inh values of PBHT and BCPE are 0.16 dL/g and 0.46 dL/g respectively. FTIR analysis identified the reaction between bis phenol A epoxy oligomer and PBHT. The crystalline properties of polymers were investigated with DSC and WAXD, and the results found that the crystallinity of BCPE is inferior to that of PBHT due to addition of amorphous epoxy. Thermotropic liquid crystalline nematic phase textures of polymers were observed under a polarizing microscope with hot stage.
A liquid crystalline block copolymer ( BCPE) was synthesized from bis-phenol-A epoxy oligomer and liquid crystalline polyester (PBHT) which was prepared from polyhexamethylene-bis-(4-oxybenzoates) and terephthaloyl dichloride by solution polymerization. The intrinsic viscosity (eta(inh)) of the polymers was determined using an ubbelohde viscometer in phenyl hydroxide/1,1,2,2-tetrachloroethane mix solvent (1 : 1) at 30degreesC, and the results showed that the eta(inh) values of PBHT and BCPE are 0.16 dL/g and 0.46 dL/g respectively. FTIR analysis identified the reaction between bis-phenol-A' epoxy oligomer and PBHT. The crystalline properties of polymers were investigated with DSC and WAXD, and the results found that the crystallinity of BCPE is inferior to that of PBHT due to addition of amorphous epoxy. Thermotropic liquid crystalline nematic phase textures of polymers were observed under a polarizing microscope with hot stage.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2002年第2期249-252,共4页
Acta Polymerica Sinica
基金
湖南省教委资助项目 (项目号 99C10 9)
湖南省自然科学基金资助项目 (基金号 0 0JJY2 0 12 )
