The radiation-induced polymerization of cyclopentadiene at -78/sup 0/C: Progress report for the period September 14, 1962 to September 14, 1963. [Gamma radiation]
Technical Report
·
OSTI ID:6665409
Cyclopentadiene has been found to polymerize reproducibly when irradiated at -78/sup 0/C with gamma-rays. Irradiation beyond 2.0% conversion results in gel formation by cross-linking of polymer chains. The molecular weight anti M/sub n/ of the isolated (soluble) polymer exceeds 100,000. The yield of polymer is linear with irradiation dose up to 20% conversion and the initial G(-cyclopentadiene) = 25,000. Beyond a dose of 5.0 x 10/sup 19/ eVg/sup -1/, the pure monomer is converted to a highly cross-linked rubber, impervious to organic solvents. Polymerization also occurs in n-hexane as a diluent. The mechanism of polymerization has been studied by evaluating the effect of basic substances, including ammonia, on the reaction. Our results provide conclusive evidence that the mechanism is ionic in character. The nature of ionic polymerizations induced by ionizing radiation is discussed with relevance to this work and previous studies on ..cap alpha..-methylstyrene and ..beta..-pinene. Brief reference is made to some new results on the polymerization of other hydrocarbon monomers. 19 refs., 2 figs.
- Research Organization:
- Tennessee Univ., Knoxville (USA). Dept. of Chemistry
- DOE Contract Number:
- AS05-76ER02968
- OSTI ID:
- 6665409
- Report Number(s):
- DOE/ER/02968-T2; ON: DE87006859
- Country of Publication:
- United States
- Language:
- English
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Research concerning the significance of ionic reactions in the radiation chemistry of alkyl halides and olefins in the liquid state: Progress report for the period September 14, 1963 to September 14, 1964
Journal Article
·
Wed Oct 31 23:00:00 EST 1962
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·
OSTI ID:4736960
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·
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·
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Research concerning the significance of ionic reactions in the radiation chemistry of alkyl halides and olefins in the liquid state: Progress report for the period September 14, 1963 to September 14, 1964
Technical Report
·
Tue Dec 31 23:00:00 EST 1963
·
OSTI ID:6583147
Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKENES
AMMONIA
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CROSS-LINKING
CYCLOALKENES
CYCLOPENTADIENE
DATA
DIENES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
GAMMA RADIATION
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
IONIZING RADIATIONS
KINETICS
LOW TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
POLYENES
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
SPECTRA
YIELDS
400600* -- Radiation Chemistry
ALKENES
AMMONIA
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CROSS-LINKING
CYCLOALKENES
CYCLOPENTADIENE
DATA
DIENES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
GAMMA RADIATION
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
IONIZING RADIATIONS
KINETICS
LOW TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
POLYENES
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
SPECTRA
YIELDS