Effect of comonomer sorption on radiation-induced copolymer grafting onto polyethylene and EVA films in the vapor phase. [Gamma radiation]

Journal Article · Thu Jan 01 00:00:00 EST 1976 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1976.170140515· OSTI ID:7321495

Yamakita, H; Hayakawa, K

Radiation-induced copolymer grafting of acenaphthylene and maleic anhydride onto polyethylene or EVA film in the vapor phase was carried out and the effect of comonomer sorption on the grafting was studied. When polyethylene film was used as a backbone polymer, the sorption of the binary monomers during the grafting increased linearly as the grafting reaction proceeded. The marked increase was probably caused by the formation of a grafted layer. Particularly, the sorption of maleic anhydride was brought about by the existence of a grafted layer. In grafting onto EVA film, the content of maleic anhydride in the grafted copolymer increased with the increasing content of vinyl acetate in EVA. Continuous measurements of sorption of the comonomers onto EVA and grafted EVA films were carried out by use of an electrobalance. The distinctive feature of the sorption was that the equilibrium sorption of acenaphthylene or maleic anhydride onto the grafted EVA film increased and the diffusion constants for both comonomers decreased markedly with increasing percentage of graft. The copolymer grafting was explained from these results by assuming that the monomer molecules are supplied to the propagating chain ends mostly through a sorbed state on the polymer film.

• Research Organization: Government Industrial Research Inst., Nagoya, Japan
• OSTI ID: 7321495
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 14:5
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
36 MATERIALS SCIENCE
ACENAPHTHENE
CHEMICAL RADIATION EFFECTS
KETONES
POLYETHYLENES
POLYVINYLS
AROMATICS
CHEMICAL REACTIONS
CHEMISTRY
CONDENSED AROMATICS
ELECTROMAGNETIC RADIATION
HYDROCARBONS
IONIZING RADIATIONS
KINETICS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
400600* - Radiation Chemistry
360406 - Materials- Polymers & Plastics- Radiation Effects- (-1987)