Gamma irradiation of fluorocarbon polymers

Journal Article · Sat Jul 01 00:00:00 EDT 1961 · Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry

DOI:https://doi.org/10.6028/jres.065A.038· OSTI ID:4842879

Florin, Roland E.; Wall, Leo A.

Several fluorocarbon polymers were irradiated with Co⁶⁰ gamma radiation at doses up to 10²² ev/g. The polymers studied included polytetrafluoroethylene, polytrifluoroethylene, polychlorotrifluoroethylene, a copolymer of tetrafluoroethylene with hexafluoropropylene, and several rubbery vinylidene fluoride copolymers. G-values were measured for volatile products, for free radicals detected by electron spin resonances, and, in the case of polychlorotrifluoroethylene, for scissions. The course of degradation or crosslinking was followed by zero-strength-time and tensile-strength measurements. It was found that for polytetrafluoroethylene and its hexafluoropropylene copolymer the presence of air accelerated scission drastically. The mechanism of the radiation-induced changes is discussed in terms of free-radical intermediates.

• Research Organization: Originating Research Org. not identified
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-029251
• OSTI ID: 4842879
• Journal Information: Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry, Journal Name: Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry Journal Issue: 4 Vol. 65A; ISSN 0022-4332
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
COBALT 60
DETECTION
ELECTRONS
ETHYLENE
FLUORIDES
FLUORINATED HYDROCARBONS
FREE RADICALS
GAMMA RADIATION
IRRADIATION
ORGANIC CHLORINE COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
POLYETHYLENES
POLYMERS
POLYTETRAFLUOROETHYLENE
PROPYLENE
RADIATION DOSES
RADIATION SOURCES
REACTION KINETICS
RESONANCE
RUBBER
SPIN
TENSILE PROPERTIES
USES
VINYL RADICALS