SOME CHARACTERIZATION OF AMMONIA-CATALYZED PHENOLIC RESIN
氨催化酚醛树脂的若干特征

The ammonia-catalyzed phenolic resins were prepared in different conditions (mole ratio of phenol (P) to formaldehyde (F), amount of ammonia catalyst and reaction temperature). The reaction process, the structure characterization of obtained resins and the curing process of these resins were studied by chemical analysis, 1H NMR, IR, and DTA.It was shown that the consumption of F was not changed with increasing the mole ratio of F to P when the amount of ammonia was identical. It was also shown that the reaction rate and the nitrogen containing compound was increased with increasing the amount of ammonia.The other results were also discussed.