High melt strength, ethylene polymer, process for making it,...

Details High melt strength, ethylene polymer, process for making it,... High melt strength, ethylene polymer, process for making it,...

C - Chemistry, Metallurgy

08

F

C08F 10/02 (2006.01) B29C 49/04 (2006.01) C08F 8/50 (2006.01) C08F 110/00 (2006.01) C08F 110/02 (2006.01) C08F 255/08 (2006.01) C08J 3/28 (2006.01) C08J 5/00 (2006.01) C08J 5/18 (2006.01) C08J 5/22 (2006.01) C08J 7/00 (2006.01) C08J 9/22 (2006.01) C08L 23/04 (2006.01)

Patent

CA 2071779

Disclosed is a normally solid, high molecular weight, gel-free, irradiated ethylene polymer having a density of from 0.89 to 0.97 g/cc characterized by high melt strength due to strain hardening which is believed to be caused by free-end long chain branches of the molecular chains forming the polymer. Also disclosed is a process for making the polymer by high energy radiation of a normally solid, high molecular weight, ethylene polymer in a reduced active oxygen environment, maintaining the irradiated material in such environment for a specific period of time, and then deactivating free radicals in the material.

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