STUDY OF THE THERMOOXIDATIVE STABILITY AND ANTIOXIDANT EFFECTIVENESS OF BISPHENOLS OF DIFFERENT STRUCTURE

The thermo-oxidative stability and antioxidant effectiveness of bisphe nols obtained by the condensation of 2-tert-butyl-4-methylphenol with C-1-C-5 aldehydes of aliphatic series have been studied for the first time. It has been established that these features of synthesized bisph enols depend on the structure of the hydrocarbon ''bridge'' between th e phenyl groups, and their oxidation proceeds according to the laws go verning the process of Liquid-phase oxidation. It has been shown that the degradation of the investigated series of bisphenols is described by a kinetic equation with an order of the reaction of 1.25n and E-n = 74.4 kJ/mole. (C) 1997 Elsevier Science Ltd. All rights reserved.