ROLE OF UNSATURATION IN THE RADIATION CHEMISTRY OF POLYMERS. PART I. POLYETHYLENE

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Transactions of the Faraday Society (England) Superseded by J. Chem. Soc., Faraday Trans., I and II

DOI:https://doi.org/10.1039/tf9635902334· OSTI ID:4136944

Crook, M A; Lyons, B J

A study was made of the variation in concentration of the forms of carbon-carbon unsaturated groups initially present in a low and a high density polyethylene with ionizing radiation dose, and the effect of added allyl and vinyl unsaturation as triallyl cyanurate, 1,19-eicosadiene, and divinyl benzene. The expressions for decay of unsaturated groups, which were proposed by previous workers, are not obeyed although the observed deviations from these relations may be slight. The results are interpreted in terms of a mechanism that postulates energy migration to, or localization in the vicinity of, unsaturated groups followed, in most cases, by a chain reaction involving radicals. The characteristics of trans-vinylene growth in polyethylene may be explained by postulating that radiolytically formed trans-vinylene groups do not enter into a chain reaction but scavenge radicals. (auth)

• Research Organization: British Insulated Callender's Cables Ltd., London
• NSA Number: NSA-18-003855
• OSTI ID: 4136944
• Journal Information: Transactions of the Faraday Society (England) Superseded by J. Chem. Soc., Faraday Trans., I and II, Journal Name: Transactions of the Faraday Society (England) Superseded by J. Chem. Soc., Faraday Trans., I and II Vol. Vol: 59; ISSN TFSOA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALLYL RADICALS
BINDING ENERGY
CHEMISTRY
POLYETHYLENES
POLYMERS
RADIATION CHEMISTRY
RADIATION DOSES
REACTION KINETICS
VINYL RADICALS