Influence of ionizing irradiation on the electrical strength of polyolefines and their blends with elastomers

Abstract A study has been made of the structure and electrical strength E st of specimens of PE and PP and blends of PP with SKTV-1 or SKEP-60 elastomers crystallized under differing conditions and then exposed to gamma-irradiation. The radiation stability of quenched PP specimens determined from E st was several times higher than that of specimens prepared by slow cooling from the melt. It was found that the incorporation of SKTV-1 (0·5-1·5 wt.%) in PP enhances the radiation stability of the slowly cooled specimens, whereas that of the quenched film is at the same time reduced. The radiation stability in PP-SKEP-60 blends was higher than that of PP and PP-SKTV-1.