Abstract
AbstractA method is presented for studying the mechanism of carbonyl group formation in the low‐temperature oxidation of natural rubber and 1,4 cis‐polyisoprene, which does not require the investment of activation energy for the thermal or light scission of the polymer chain. Precise concentrations of t‐butyl peroxy radicals stabilized by coordination on Co (III), are used for initiation of the primary polymer radicals ˜Ṙ˜ after abstraction of an α‐methylene‐hydrogen. The “critical” threshold levels of peroxy radicals before and during the course of the oxidative degradation is discussed. The sensitivity for radical attack increases with the number of aliphatic double bonds; this is demonstrated using polypropylene and paraffin oil.
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