Investigations on the hydrolytic stability of polyphenyl-1, 3, 5-triazine in water at high temperature

Hydrolysis of polyphenyl-1, 3, 5-triazine and its model compound were condu cted in water at 250 degreesC/3. 97 MPa. The results showed that polyphenyl -1, 3, 5-triazine has outstanding heat and hydrolytic stability because no notable changes were observed on the IR spectra. The major hydrolysates fro m the polymer and model compound were aromatic carboxylic acids, which char acterized by high performance liquid chromatography, high performance capil lary electrophoresis, and liquid chromatography-mass spectrometer. Hydrolyt ic mechanisms were also suggested on the basis of the experimental observat ions. The high activation energy for the rate-dominative step predicted by the semiempirical quantum chemistry method, PM3, well expounded the excelle nt hydrolytic stability of polyphenyl-1, 3, 5-triazine.