Time-resolved characterization of radiation-generated species in molten polyethylene

O. Brede, R. Hermann, L. Wojnárovits, L. Stephan, T. Taplick

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

With pulse radiolysis and detection by optical absorption spectroscopy in transparent, molten and highly viscous polyethylene (PE) polymer radicals and alkene type radical cations were observed and characterized by their reactions with additives (CCl4, R3N, C2H4, the group CH2OCH2, etc.). The transformation of PE alkyl radicals to allylic ones takes place under these conditions with a rate parameter of about 3 × 104 s-1. In the presence of additives, such as diphenylamine, benzophenone, styrene, etc., product radicals derived from these substances appear mainly in a very rapid reaction. This effect is discussed in terms of the exciton migration model for alkane type polymers, which has been supported until now by steady-state irradiation experiments only.

Original languageEnglish
Pages (from-to)403-413
Number of pages11
JournalRadiation Physics and Chemistry
Volume34
Issue number3
Publication statusPublished - 1989

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polyethylenes
radiation
polymers
radiolysis
styrenes
alkanes
alkenes
absorption spectroscopy
optical absorption
excitons
cations
irradiation
products
pulses

ASJC Scopus subject areas

  • Radiation

Cite this

Time-resolved characterization of radiation-generated species in molten polyethylene. / Brede, O.; Hermann, R.; Wojnárovits, L.; Stephan, L.; Taplick, T.

In: Radiation Physics and Chemistry, Vol. 34, No. 3, 1989, p. 403-413.

Research output: Contribution to journalArticle

Brede, O. ; Hermann, R. ; Wojnárovits, L. ; Stephan, L. ; Taplick, T. / Time-resolved characterization of radiation-generated species in molten polyethylene. In: Radiation Physics and Chemistry. 1989 ; Vol. 34, No. 3. pp. 403-413.
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