Radiation-induced copolymerization of hexafluoroacetone with 2-methyl-1-pentene

Journal Article · Thu Feb 01 04:00:00 EST 1979 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1979.170170224· OSTI ID:6168817

Watanabe, S; Matsuda, O; Okamoto, J; Machi, S; Ishigure, K; Tabata, Y

Copolymerization of hexafluoroacetone (HFA) with 2-methyl-1-pentene (2MP) in trichlorotrifluoroethane (R-113) was carried out by ..gamma..-ray irradiation in a low temperature region of -100 to 0/sup 0/C. Though HFA does not homopolymerize and 2MP scarcely does, the copolymerization took place at various monomer compositions. The copolymerization rate and the molecular weight in the low-temperature region were much higher than those at 0/sup 0/C. Above room temperature the copolymerization did not take place and only the adduct of monomers was formed. The copolymerization was inhibited to some extent by cation scavengers, but not by radical or electron scavengers. Elemental analysis and nuclear magnetic resonance (NMR) spectra show that the copolymer consists of almost equimolar monomer units and has two types of structure, head to tail and head to head or tail to tail. It has been concluded that copolymerization probably proceeds via a cationic mechanim to form an alternating copolymer. 8 figures, 3 tables.

• Research Organization: Japan Atomic Energy Research Inst., Takasaki
• OSTI ID: 6168817
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 17:2; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ADDITIVES
ADDUCTS
ALKENES
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
COMPARATIVE EVALUATIONS
COPOLYMERIZATION
DECOMPOSITION
DME
DOSE RATES
ELECTROMAGNETIC RADIATION
ETHERS
FLUORINATED ALIPHATIC HYDROCARBONS
GAMMA RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
IONIZING RADIATIONS
IONS
KETONES
KINETICS
LOW TEMPERATURE
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
PENTENES
POLYMERIZATION
POLYMERS
QUANTITY RATIO
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
REACTION KINETICS
RESONANCE
SCAVENGING
SOLVENTS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
YIELDS