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

Abstract

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Japan Atomic Energy Research Inst., Takasaki
OSTI Identifier:
6168817
Resource Type:
Journal Article
Journal Name:
J. Polym. Sci., Polym. Chem. Ed.; (United States)
Additional Journal Information:
Journal Volume: 17:2
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; KETONES; CHEMICAL RADIATION EFFECTS; ORGANIC FLUORINE COMPOUNDS; PENTENES; ADDITIVES; ADDUCTS; CATIONS; CHEMICAL REACTION KINETICS; CHEMICAL REACTION YIELD; CHLORINATED ALIPHATIC HYDROCARBONS; COMPARATIVE EVALUATIONS; COPOLYMERIZATION; DME; DOSE RATES; FLUORINATED ALIPHATIC HYDROCARBONS; GAMMA RADIATION; LOW TEMPERATURE; NUCLEAR MAGNETIC RESONANCE; ORGANIC POLYMERS; ORGANIC SOLVENTS; QUANTITY RATIO; RADIOLYSIS; SCAVENGING; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; ALKENES; CHARGED PARTICLES; CHEMICAL REACTIONS; CHEMISTRY; DECOMPOSITION; ELECTROMAGNETIC RADIATION; ETHERS; HALOGENATED ALIPHATIC HYDROCARBONS; HYDROCARBONS; IONIZING RADIATIONS; IONS; KINETICS; MAGNETIC RESONANCE; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; POLYMERIZATION; POLYMERS; RADIATION CHEMISTRY; RADIATION EFFECTS; RADIATIONS; REACTION KINETICS; RESONANCE; SOLVENTS; YIELDS; 400600* - Radiation Chemistry

Citation Formats

Watanabe, S., Matsuda, O., Okamoto, J., Machi, S., Ishigure, K., and Tabata, Y. Radiation-induced copolymerization of hexafluoroacetone with 2-methyl-1-pentene. United States: N. p., 1979. Web. doi:10.1002/pol.1979.170170224.
Watanabe, S., Matsuda, O., Okamoto, J., Machi, S., Ishigure, K., & Tabata, Y. Radiation-induced copolymerization of hexafluoroacetone with 2-methyl-1-pentene. United States. doi:10.1002/pol.1979.170170224.
Watanabe, S., Matsuda, O., Okamoto, J., Machi, S., Ishigure, K., and Tabata, Y. Thu . "Radiation-induced copolymerization of hexafluoroacetone with 2-methyl-1-pentene". United States. doi:10.1002/pol.1979.170170224.
@article{osti_6168817,
title = {Radiation-induced copolymerization of hexafluoroacetone with 2-methyl-1-pentene},
author = {Watanabe, S. and Matsuda, O. and Okamoto, J. and Machi, S. and Ishigure, K. and Tabata, Y.},
abstractNote = {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.},
doi = {10.1002/pol.1979.170170224},
journal = {J. Polym. Sci., Polym. Chem. Ed.; (United States)},
number = ,
volume = 17:2,
place = {United States},
year = {1979},
month = {2}
}