Dicumyl peroxide

Dicumyl peroxide is an organic compound with the formula . Classified as a dialkyl peroxide, it is produced on a large scale industrially for use in polymer chemistry. It serves as an initiator and crosslinking agent in the production of low density polyethylene.

Production

It is synthesized as a by-product in the autoxidation of cumene, which mainly affords cumene hydroperoxide. Alternatively, it can be produced by the addition of hydrogen peroxide to α-methylstyrene.
Of the approximately 60,000 ton/y production of dialkyl peroxides, dicumyl peroxide is dominant.

Properties

Dicumyl peroxide is relatively stable compound owing to the steric protection provided by the several substituents adjacent to the peroxide group. Upon heating, it breaks down by homolysis of the relatively weak O-O bond.