STUDY ON THE KINETICS OF INTERFACIAL POLYCONDENSATION FOR POLYARYLATE

For the synthesis of polyarylate by interfacial polycondensation of bi sphenol A with terephthaloyl/isophthaloyl dichloride, the kinetic mech anism was studied through the detection of the concentration of bisphe nolate in the aqueous phase by UV spectrometry. The mechanism consists of three steps: 1. the transportation of bisphenolate in the aqueous phase, 2. the transfer of bisphenolate through the interface followed by its transportation in the organic phase, 3. the reaction of bisphen olate with the phthaloylic dichloride in the organic phase. The reacti on of bisphenolate with the phthaloylic dichloride in the organic phas e is the rate-determining step. The influence of the concentration in either the aqueous phase or the organic phase and of the quantity of t he phase transfer agent on interfacial polycondensation were studied.