A STUDY OF THE MECHANISM OF RADIATION-INDUCED GELATION IN MONOMER-POLYMER MIXTURES. Quarterly Summary Report, May 1-July 31, 1961

Technical Report · Tue Aug 01 04:00:00 EDT 1961

OSTI ID:4842900

Odian, G; Bernstein, B S; Kelly, J J

Gel contents of irradiated polyethylene previously swollen with fourteen different di- and tri-functional monomers were accurately measured. Eight of these monomets are useful in reducing the radiation dose required to induce gelation. Allyl acrylate and allyl methacrylate produce the largest gel fractions ( approximately -40%) after a dose of 1.2 mrads on the Co/sup 60/ source; these two monomers also swell polyethylene to a greater extent than the others. The degree of desorption of the above monomers from polyethylene during irradiation were measured. Machine irradiation of polyethylene-- allyl acrylate and polyethylene -- allyl methacrylate systems give higher gel contents ( approximately -60%) than are obtained under Co/sup 60/ irradiation conditions. This is probably due to the fact that desorption of these monomers is less under machine irradiation conditions. Continuous reswelling and reirradiation of polyethylene-- allyl acrylate and polyethylene-- allyl methacrylate systems give gel contents of about 80% after four cycles. After each cycle, an increased amount of monomer is incorporated into the Polymer by swelling, while the increase in gel content becomes smaller. Swelling ratios of irradiated polyethylene-monomer combinations were also measured. (auth)

• Research Organization: Radiation Applications Inc., Long Island City, N.Y.
• NSA Number: NSA-15-029223
• OSTI ID: 4842900
• Report Number(s): NYO-9829
• Country of Publication: United States
• Language: English

Related Subjects

ACRYLIC ACID
ALLYL RADICALS
CHEMISTRY
COBALT 60
COLLOIDS
EXPANSION
GELATION
INDUCTION
IRRADIATION
MEASURED VALUES
METHACRYLATES
METHACRYLIC ACID
MIXING
MONOMERS
POLYETHYLENES
POLYMERS
PRODUCTION
RADIATION DOSES
RADIATION SOURCES
RADIATIONS
REACTION KINETICS