ABSTRACT:The catalytic oxidative degradation of polyethylene in the solid phase was studied. Cobalt(II), manganese(II), or iron(III) acetylacetonates were used as catalysts. The influences of type and amount of catalyst, temperature, and type of oxidizing agent on polyethylene oxidation were investigated. The obtained products were characterized by determination of acid and ester numbers as well as by means of FTIR spectroscopy.
A study was carried out on the kinetics of free-radical chain oxidation of 1-isopropyl-4-methoxybenzene (1a) and 1-ethyl-4-methoxybenzene (1b) with oxygen in the liquid phase to yield 1-methyl-1-(4-methoxyphenyl)ethyl hydroperoxide (2a) and 1-(4-methoxyphenyl)ethyl hydroperoxide (2b). The oxidizability of 1a and 1b was studied over the temperature range 50-100 • C. Long-term oxidations of 1a and 1b to the corresponding hydroperoxides were carried out and the properties and thermal stability of 2a were established. C 2002 Wiley Periodicals, Inc. Int J Chem Kinet 35: [89][90][91][92][93][94] 2003
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