CAJ | 학술논문

以4,4'-二羟基联苯、 4-硝基苯胺、二溴己烷、甲基丙烯酸、氯代乙醇为原料合成了单体甲基丙烯酸［5-(4'-甲氧基联苯-4-氧基)戊基］酯(M5MPP)、 4-硝基偶氮苯基甲基-2-甲基丙烯酸酯基乙胺(MMEANB), 并完成了单体的聚合和共聚, 得到了含有非线性光学活性基团(NLO)的侧链液晶高分子, 对其结构进行了表征. 结果表明, 均聚物PM5MPP及共聚物(M5MPP/MMEANB)属双向液晶高分子; PMMEANB属于非晶性高分子. 证实了分子间吸电子与给电子基团相互作用有利于提高液晶高分子热稳定性, 共聚物(M5MPP/MMEANB)具有较宽的液晶相温度范围.
이4,4'-이간기련분、 4-초기분알、이추기완、갑기병희산、록대을순위원료합성료단체갑기병희산［5-(4'-갑양기련분-4-양기)무기］지(M5MPP)、 4-초기우담분기갑기-2-갑기병희산지기을알(MMEANB), 병완성료단체적취합화공취, 득도료함유비선성광학활성기단(NLO)적측련액정고분자, 대기결구진행료표정. 결과표명, 균취물PM5MPP급공취물(M5MPP/MMEANB)속쌍향액정고분자; PMMEANB속우비정성고분자. 증실료분자간흡전자여급전자기단상호작용유리우제고액정고분자열은정성, 공취물(M5MPP/MMEANB)구유교관적액정상온도범위.
A new series of side chain liquid crystal polymers based on the backbone of polymethacrylate containing 4-nitroazobenzene and 4-methoxybiphenyl group as side chain mesogen were prepared and characterized, FTIR, 1H NMR, POM and WAXD were used to study the structure, phase behavior and mesophase texture of this series of SCLC copolymers. The researches show that polymer PM5MPP and copolymer M5MPP/MMEANB are enantiotropic liquid crystalline polymers, but polymer PMMEANB has no liquid crystalline properties. DSC results showed that the thermal stability of the mesophase of this series of copolymers was enhanced by the existence of intermolecular electron donor-acceptor interaction. It was found that the temperature range of the mesophase of the copolymers was broadened with increasing 4-nitroazobenzene units. The focal-conic texture observed by POM indicated that this series of the copolymers possessed the characteristics of smectic liquid crystal.