Abstract：Poly (ethylene adipate) (PEA) with the number average molecular weight of 1 000—4 000 is one of main raw materials for producing polyurethane, which is manufactured with ethylene glycol (EG) and adipic acid (AA). The effects of different kinds of catalyst, the catalyst dosage and reaction temperature on the concentration of carboxyl, molecular weight in polycondensation process of producing the low molecular weight PEA were investigated experimentally. The results showed that tetraisopropyl titanate (TPT) had the optimal catalytic activity with the dosage of 25—50 mg/kg, while the proper range of reaction temperature were 220—250 ℃. Based on batch experiments and the second-order kinetic model in the present of additional catalysts for esterification and polycondensation reactions, the kinetic parameters of polycondensation process for PEA were estimated by genetic algorithm, and the average relative error between calculated and experimental values was less than 9%.
Xi Zhenhao,Chen Like,Pan Xun et al. Reaction Kinetics of Polycondensation Process of Low Molecular Weight Poly (ethylene adipate)[J]. 化学反应工程与工艺, 2014, 30(2): 97-101.
