摘要
以联苯二氯苄制备的对联苯二甲酰氯和1.6-已二醇为单体合成了热致型主链液晶高分子,并以此液晶高分子与对苯二甲酸乙二醇酯(PET)在少量扩链剂双2-恶唑啉(BOZ)存在下进行反应性共混.探讨了单体摩尔比、反应温度、催化剂等因素对液晶合成的影响.利用红外光谱对对联苯二甲酸和聚酯液晶进行了表征,用DSC对聚酯液晶进行了热分析.研究了对反应性共混条件对共混物热性能的影响.结果表明,BOZ对酯交换的促进作用使玻璃化温度(Tg)升高,延长共混时间和提高共混温度使冷结晶温度(Tcc)升高,溶体结晶温度(Tmc)和熔点(Tm)下降.
Based on p,p-terpheny1-4,4-dichlorofromldiphenyl prepared by phenybenzene dichloromethane and 1,6-hexanediol as material,the thermotropic chain liquid crystalline (PET)are reactively blended in the presence of bisbenzo thiazole(BOZ)as extender.Then the effect of monomer molar ratio,reaction temperature and catalyst on the synthesis of LCP is studied.The diphenyl dicarboxylic acid and polyexter liqued crystalline polymer are characterized by FTIR.The thermal property of LCP is studied by DSC.The effect of reactive blend condition on thermal properties is also studied. The result shows that the glass transition temperature(T_g)goes up due to the promotion of ester exchange and the cooler crystalline temperature(Tcc)rises whereas melt crystalline temperature(Tmc)descends with prolonging blend time and raising blend temperature.
出处
《湖南工程学院学报（自然科学版）》
2004年第4期72-76,共5页
Journal of Hunan Institute of Engineering(Natural Science Edition)
