PABA与PET共聚合反应的研究

１．报告了对乙酰氧基苯甲酸（ＰＡＢＡ）的合成及其自缩聚反应的研究结果。表明自缩聚反应在远低于ＰＥＴ熔点温度下便开始进行，反应速度常数与温度倒数关系有一极值，从反应机理对结果的影响进行了分析和讨论。Ⅱ．考察了对羟基苯甲酸（ＰＨＢ）对ＰＥＴ的酸解反应，除进一步验证了ＰＡＢＡ与ＰＥＴ共聚反应中确存在酸解反应外，还表明这一反应是较为迅速的。

STUDY ON THE PABA/PET COPOLYMERIZATION

The synthesis and self-polycondensation reaction of p-acetoxy-benzoic acid(PABA) have been studied in thispaper. It is shown that the reaction of PABA self-polycondensation is come into being at the temperaturewhich is far slower than the melting point of PET,the relation of the velocity constant of reaction with thereciprocal of temperature has a maximum. The influence of the reaction mechanism on the reaction results isanalyzed and discussed.The acidolysis reaction of phydroxy-benzoic acid(PHB) on the PET is studied.It isfurther confirmed that the acidolysis reaction is really existing in the process of PABA/PET copolymeriza-tion,and that this reaction is much rapid.