聚酯的直接缩聚合成法是从合成聚羟基苯甲酸发展而来,已成功地用于合成聚芳酯,但有关反应机理的研究报导很少。 我们亦对反应机理进行了探讨,实验方法是先配制定量的对甲苯磺酰氯(TsCl)-吡啶溶液,溶解后立即用移液管将溶液移至比色皿中,加入不同量的二甲基甲酰胺(DMF),用可见-紫外光分光光度法跟踪反应,并用红外光谱法测定反应的中间产物,结果报导如下。 The direct polycondensation method of polyesters is developed from the synthesis of polyhydroxybenzoic acid and has been successfully used to synthesize polyarylate. However, there are few reports on the reaction mechanism. We also discussed the reaction mechanism, the experimental method is first to prepare a quantitative p-toluenesulfonyl chloride (TsCl) - pyridine solution, immediately after the solution was pipetted to the cuvette, adding different amounts of dimethyl Formamide (DMF). The reaction was followed by visible-UV spectrophotometry and the intermediate of the reaction was measured by infrared spectroscopy. The results are reported below.