Copolymerization of ethylene induced by cobalt-60 gamma radiation
The gamma-initiated copolymerization of ethylene with a number of different monomers was studied at 20 deg C and initial pressures to 680 atmospheres. The experiments were conducted statically in two-phase systems with the exception of the ethylene-carbon monoxide system. Isolation of the copolymers was effected by solvent extraction and fractional precipitation techniques. Infrared spectroscopy was used for identification. The composition was determined by elemental analysis. A partial evaluation of some of the reaction products including crystalline melting points, densities, solubility characteristics, and molecular weights are given. Evidence of ethylene copolymerization was established with each of the following monomers: styrene, methyl methacrylate, vinyl acetate, acrylonitrile, allyl acetate, isobutylene, chlorotrifluoroethylene, trans 2-butene, methyl acrylate, isoprene, propylene, vinyl chloride, 1-butene, cis 2-butene, Co vinyl pyrrolidone, methyl vinyl ketone, and divinyl benzene. The experimental data obtained in the study of the ethylene-carbon monoxide system were found to obey a linear form of the copolymer composition equation. The ratio of specific rate constants for carbon monoxide and ethylene ( alpha ) was found to have a value of 22.0, indicating that carbon monoxide is a monomer, is activated to the extent that it adds 22 times as fast as an ethylene monomer to an ethylene free radical chain end. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(30-2)-GEN-16
- NSA Number:
- NSA-17-018103
- OSTI ID:
- 4736083
- Report Number(s):
- BNL-6849-
- Resource Relation:
- Conference: IAEA conference, Salzburg (Austria), 24-27 May 1963; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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