Radiation Protection in Irradiated Dimethylsiloxane Polymers

Journal Article · Tue Apr 23 04:00:00 EST 1963 · Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences

DOI:https://doi.org/10.1098/rspa.1963.0078· OSTI ID:4718648

Charlesby, A.; Garratt, P. G.

Small concentrations of certain additives can greatly modify the effects produced by reaiation of macromolecules such as polymers and biological systems. With anthracene in dimethylsiloxane polymers, however, no such dependence was observed. The additives studied were anthracene, iodine, sulfur, and benzophenone, and their protective effect on the crosslinking of dimethylsiloxane polymer was investigated at various dose rates. Contrary to generally accepted views on reaction mechanisms no dose-rate effect was observed; anthracene provided no protection against crosslinking, although it was itself destroyed. Iodine and colloidal sulfur provided a considerable measure of protection, but had no effect on gas evolution. Benzophenone also offered protection, but also reduced the gas yield. To explain these very different patterns of behavior, it is necessary to modify some present views on the nature of the protection offered; this leads to a discussion as to the mechanism of crosslinking.

• Research Organization: Royal Military Coll. of Science, Shrivenham, Wiltshire, Eng.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-021759
• OSTI ID: 4718648
• Journal Information: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences, Journal Name: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences Journal Issue: 1352 Vol. 273; ISSN 1364-5021
• Publisher: The Royal Society Publishing
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ADDITIVES
ANTHRACENE
CHEMISTRY
COLLOIDS
CROSS-LINKING
EFFICIENCY
GASES
IODINE
KETONES
METHYL RADICALS
PHENYL RADICALS
POLYMERIZATION
POLYMERS
RADIATION DOSES
RADIATION PROTECTION
REACTION KINETICS
SILICONES
SILOXANES
SULFUR