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研完了用固相缩聚方法提高全芳液晶聚酯的分子量。以2,6-萘二甲酸,对/间羟基苯甲酸、双酚类单体为原料,经熔融酯交换合成低聚物,再以固相反应制备共聚酯。通过对共聚酯熔融指数的变化,探讨固相缩聚中反应时间和反应温度的效应,共聚酯分子结构和聚集态结构与固相缩聚反应速率的关系;并通过X-射线衍射分析,考察固相缩聚对聚酯结晶性的影响。得出全芳聚酯固相缩聚过程是一个由化学反应为主要控制,继而转化到物理扩散为主要控制的过程。
Finished using solid phase polycondensation method to improve the molecular weight of all-aromatic liquid crystal polyester. Using 2,6-naphthalene dicarboxylic acid, p-hydroxybenzoic acid and bisphenol monomer as raw materials, the oligomers are synthesized through melt transesterification, and then the copolyester is prepared by solid-phase reaction. Based on the change of melt index of copolyester, the effects of reaction time and reaction temperature, the molecular structure and aggregation structure of copolyester and the solid-state polycondensation reaction rate were discussed. X-ray diffraction analysis Effect of Solid State Polycondensation on Crystallization of Polyester. It concludes that the process of solid phase polycondensation of allflexible polyester is a process mainly controlled by chemical reaction and then transferred to physical diffusion.