Polymer irradiation.

摘要

A process for the preparation of an oriented homo- or copolyalkene material of improved strain rate sensitivity, which process comprises subjecting the oriented homo- or co-polyalkene material having a weight average molecular weight (Mw) </=350,000, a number average molecular weight (Mg) >/=5,000, and a 2% secant modulus of at least 10 GPa at a strain rate of 2 x 10<-><2> sec<-><1> to a high energy irradiation of a dosage of at least 1 Mrad and not more than 60 Mrads at an elevated temperature in vacuo or in an inert or sensitising atmosphere.