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

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

Research output: Contribution to journalConference article

11 Citations (Scopus)


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
Issue number3
Publication statusPublished - Dec 1 1989
Event4th Working Meeting on Radiation Interaction - Some Extended Papers - Leipzig, East Ger
Duration: Sep 21 1987Sep 25 1987

ASJC Scopus subject areas

  • Radiation

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