Process for cross-linking or degrading polymers and shaped articles obtained by this process

Claim 1

A process for cross-linking (co)polymers of ethylene and elastomers, comprising adding an effective amount of an organic peroxide to said (co)polymers of ethylene and elastomers, said organic peroxide comprising at least one carbon-carbon double bond and corresponding to the formula: ##STR3## where m=0, 1 or 2; n=1, 2 or 3; m+n≦3; R 1 is selected from the group consisting of a hydrogen atom and an alkyl group containing 1-3 carbon atoms; R 2 is an alkyl group containing 1-4 carbon atoms; R 3 -R 6 are alkyl groups containing 1-10 carbon atoms; R 7 is selected from the group consisting of an alkyl group containing 1-10 carbon atoms substituted with a C 1-10 alkoxy group, a C 1-10 acetoxy group or a hydroxyl group, an alkyl group containing 1-10 carbon atoms and a group A of the formula ##STR4## wherein p=1 or 2 and R 8 and R 9 are equivalent to R 2 and R 1 , respectively; and wherein in a case of disubstitution, aromatic ring substituents are not ortho to each other; in a case of trisubstitution, said substituents are not in three adjacent positions, and when m=0, R 7 represents the group A.