Pulse radiolysis studies on the polymerization of 1,6-hexanediol diacrylate in cyclohexane solvent

L. Wojnarovits, E. Takacs, J. Dobo, G. Foldiak

Research output: Contribution to journalConference article

17 Citations (Scopus)

Abstract

The mechanism of initiation and kinetics of radiation induced polymerization of 1,6-hexanediol diacrylate (HDDA) was studied by pulse radiolysis with optical detection in cyclohexane solution and in pure HDDA at room temperature. In both cases a transient light absorption decreasing with the wavelenglh in the 270-400 nm wavelength range, but possessing a shoulder at 310 nm was observed. The spectrum did not change with time after the pulse. The absorption is due to α-carboxyalkyl radicals: the assignment was supported by the results obtained from the reaction of electrons with methyl 2-chloropropionate leading to dechlorination. The radicals produced from HDDA or from the chloro compound decayed in a second order process with rate parameters of 5·108 and of 4·109 mol-1 dm3 s-1 in cyclohexane. In the presence of oxygen the corresponding peroxy radicals decaying in very slow process (several milliseconds) were observed. The results are interrupted in terms of radical polymerization mechanism.

Original languageEnglish
Pages (from-to)59-63
Number of pages5
JournalRadiation Physics and Chemistry
Volume39
Issue number1
Publication statusPublished - Jan 1 1992
Event3rd International Meeting on Pulse Investigations in Physics, Chemistry and Biology - Pultusk, Pol
Duration: Apr 15 1991Apr 20 1991

ASJC Scopus subject areas

  • Radiation

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