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Primary Processes in Radiation-Induced Crosslinking of Poly(2-phenylbutadiene)

Polymer Journal volume 19, pages 667672 (1987) | Download Citation

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Abstract

The radiation-induced crosslinking of poly(2-phenylbutadiene) (PPB) in ethylene dichloride solution was studied in vacuum at 303 K. The G value of the crosslinking was estimated to be about 7.2. In order to detect the reaction intermediates under irradiation, optical absorption spectra in rigid matrices and ESR spectra in bulk were measured. The absorption spectra due to radical cation of PPB and due to α,α-disubstituted benzyl cation were observed in butyl chloride glass. ESR spectra owing to polyenyl type radical was found in the irradiated specimens of PPB and Diels-Alder type dimer of 2-phenylbutadiene. The primary processes in radiation-induced cross-linking of PPB were discussed on the basis of the results obtained.

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Affiliations

  1. Research Reactor Institute, Kyoto University

    • Hitoshi Yamaoka
  2. Department of Polymer Chemistry, Kyoto University

    • Kazuo Kato
    •  & Seizo Okamura

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https://doi.org/10.1295/polymj.19.667