RADIATION PROTECTION IN AQUEOUS POLYMER SOLUTIONS

Journal Article · Mon Oct 01 04:00:00 EDT 1962 · Intern. J. Radiation Biol.

DOI:https://doi.org/10.1080/09553006214551171· OSTI ID:4722451

Charlesby, A; Kopp, P M

Water-soluble polymers (polyvinylpyrrolidone and polyethyleneoxide) can be cross-linked by irradiation when present in aqueous solutions. A study of the gelation dose versus concentration indicates little contribution from the indirect effect (due to energy absorbed in the water) in the range from 1% to 65% for polyvinylpyrrolidone K.35 and from 0.5% to 10% for polyethyleneoxide WSR.35. The gelation dose is greatly modified by the presence of various small amounts of certain additives. The relationship between the degree of protection (i.e. the relative increase in gelation dose) and the additive concentration was studied for various additives at different concentrations. It was found that the gelation dose increases with additive concentration and protection occurs up to a iimiting concentration and is then unaffected by a further increase in additive concentration. Values are given of the protection offered by a wide range of additives of the two types. Many additives are distinguished by the presence of sulfur in their structure. In the presence of oxygen the gelation dose is increased. This is not a true protection effect and is not affected by the additive. A few comparisons can be made between the effect of some additives in polymer solutions and in protection experiments with mice. Further investigations are in progress to study the fate of the protecting additives. (auth)

• Research Organization: Royal Military Coll. of Science, Shrivenham, Eng.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-010690
• OSTI ID: 4722451
• Journal Information: Intern. J. Radiation Biol., Journal Name: Intern. J. Radiation Biol. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ADDITIVES
CHEMISTRY
CROSS-LINKING
POLYMERIZATION