| 摘要 |
A process is provided for extending and cross-linking olefin polymers, diolefin polymers and copolymers thereof with other olefins, diolefins, or monomers copolymerizable therewith, using as the cross-linking agent an azo compound of the formula: wherein R1, R2, R3, and R4 are alkyl having from one to about six carbon atoms. The process is of particular application in the production of cross-linked pipe of such polymers and copolmers. |
