A novel phenylethynyl-terminated siloxane: Synthesis and electron beam cure

Ian Hamerton, John N. Hay, Gerald Howgate, Brendan J. Howlin, Paula O'Gara

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)


The synthesis of a novel phenylethynyl-terminated siloxane polymer is described, by reaction of the amine-terminated siloxane with 4-phenylethynylphthalic anhydride. The oligomer (PET-PDMS) is electron beam (EB) curable, in contrast to the commercial phenylethynyl-terminated imide, PETI-5, probably as a result of increased polymer chain mobility arising from siloxane incorporation. Raman spectroscopy indicates that the cure mechanisms for electron beam and thermal cure of PET-PDMS are different. PET-PDMS appears to undergo chain scission under the influence of an electron beam. Differential scanning calorimetry of the EB cured polymer is also consistent with a mechanism involving cleavage of siloxane linkages.

Original languageEnglish
Pages (from-to)143-154
Number of pages12
JournalHigh Performance Polymers
Issue number1
Publication statusPublished - 1 Jan 2003


  • Electron beam cure
  • Phenylethynyl-terminated
  • Siloxane


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