低应力光学系数、高光学性能脂环族聚酯的合成工艺与表征

Preparation and Characterization of Cycloaliphatic Polyester with Low Stress-Optical Coefficient and High Optical Properties

采用1,4-环己烷二甲醇(CHDM)与1,4-环己烷二甲酸(CHDA)通过两阶段连续反应合成脂环族聚酯———聚(1,4-环己烷二甲酸-1,4-环己烷二甲醇酯)(PCCD)。研究了常压酯化阶段和真空缩聚阶段的合成工艺,包括酯化温度、缩聚温度和真空压强对聚合反应的影响,获得较理想的制备条件;采用红外光谱和核磁共振分析反应产物,表明其化学结构特征符合PCCD的分子特点。最后进行光学性能测试,实验结果表明,合成出的PCCD是一种具有低应力光学系数的高透光率、低雾度和低黄色指数透明材料。

Poly（1,4-cyclohexanedimethyl-1,4-cyclohexanedicarboxylate）（PCCD）,a kind of cycloaliphatic polyester,was prepared by melt polycondensation of 1,4-cyclohexanedimethanol（CHDM） and 1,4-cyclohexanedicarboxylic acid（CHDA） in the presence of TBT as catalyst in a successive two-step polymerization.Esterification process and transesterification process were investigated including esterification temperature,transesterification temperature and reaction pressure at polymerization-under-vacuum stage.The optimal preparing conditions at various steps were then gained.FTIR and NMR were used to analyze the product and the result demonstrated the structure of PCCD.The optical tests show that PCCD is a kind of transparent polymer with high transmittance,low haze and yellow index,and low stress-optical coefficient.