Accession Number : AD0623307

Title :   LOW TEMPERATURE POLYMERIZATION STUDIES.

Descriptive Note : Progress rept. no. 7, 1 Jul-30 Sep 65,

Corporate Author : AKRON UNIV OHIO INST OF RUBBER RESEARCH

Personal Author(s) : Morton,Maurice

Report Date : 27 OCT 1965

Pagination or Media Count : 52

Abstract : Further investigation of the radiation polymerization of fluoral in methylene chloride confirmed that a rate relation of the form Rp = kp((M)(M)/S), (where M = monomer, and S = solvent) can be applied over a range of monomer concentration from 1 to 6 molar. This can be taken as evidence for termination by reaction with the methylene chloride. The results are consistent with a preferred anionic mode of polymerization of this monomer. Other experiments have shown that fluoral is very readily polymerized by bases, even by such weakly basic compounds as dimethylformamide. The polymerization of the fluorovinyl monomers is probably caused by the high energy radical-cation formed as a result of primary radiolysis, i.e. (using VF as an example): CH2 = CH2 + photon (yields) .CH2CHF(+) + e(-). This species can polymerize as a cation or as a radical; however, at low temperature the cation reaction is the more vigorous: .CH2CHF(+) + VF (yields) .(CH2CHF)mCH2CHF(+).

Descriptors :   (*RADIATION CHEMISTRY, POLYMERIZATION), (*POLYMERIZATION, LOW TEMPERATURE), (*HALOCARBON PLASTICS, SYNTHESIS(CHEMISTRY)), HALOCARBON PLASTICS, FLUORINE COMPOUNDS, ALKENES, REACTION KINETICS, FREE RADICALS, GAMMA RAYS, ORGANIC SOLVENTS, VINYL PLASTICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE