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2184 M.D.al I European Polymer Jourmal 37(2001)2177-2186 a samples Samples THEVA(C) TmPP(C) EVA90 23 160 EVA40 ated with D=100kG EVA40 116 150 113 D(kGy 166 166 141 120 200 Temperature,C ⑧ where AH is the volume enthalpy of melting.is the 53 e前s7Sory E 83 ne equation can be due to the lower values ofas well a 100 the highamount nthe stru h VA branches inhibit the chain folding of the molecule 113 and thus increa h tie moled cular d sity.Ih he melt 166 meiting tem curves of the unirradiated samples.corre ponding to the 20 Temperature,C to lower temperatures.A high number of crystal nuclei xtra low tem (above 00 kGy for orted [20.21.27].the radiation has a stro ion Sa and b).This Teeicwithcpsaiatioaioamacos-linlkdmc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