Abstract
Crosslinkings in polydimethyl siloxane and polydimethyl-diphenyl siloxane irradiated with Co-60 γ-rays were studied in the temperature range from 67°C to -196°C. The G -value of crosslinking for polydimethyl siloxane depended on temperature above -100°C and the crosslinking reaction was explained by radical process; below this temperature, the G -value was not dependent on temperature and the reaction was considered to be due to non-radical process. On the other hand, the G -value of crosslinking for the polydimethyl-diphenyl siloxane depended on temperature over the whole temperature range, and the reaction was due to radical process. The relationship between crosslinking reaction and molecular motion is discussed.
Published Version
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