It is pointed out that the significance of thermally stimulatedconductivity in polyethylene following its exposure to directly orindirectly ionizing radiation is that it can be measured and related tothe amount of energy absorbed by the polyethylene from the radiation.Measurement of the apparent increase in conductivity is straightforward.Following exposure to radiation, raising the temperature will produce animmediate increase in current flowing through a specimen and the currentwill shortly fall to the value it had before irradiation. In an attemptto investigate how the manufacturing process might influence theproperties of a material, a selection of eight Sclair resins designedfor rotomolding were obtained. Variations in crystallinity and thepresence of additives, which are used to prevent oxidation andUV-induced deterioration, are assumed to be important factors inaffecting the desired behavior
展开▼
