A comparative study of the radiation resistance of four optically transparent polyimides

Sheila Devasahayam, David J. T. Hill, John W. Connell

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A comparative study of the high energy radiation resistance to formation of radicals in two pairs of polymers is reported. In one pair of polymers the phenyl groups containing the imide rings are separated by an ether linkage and in the other pair they are separated by an hexafluoroisopropylidine group. Two of the polymers contained aromatic amine units linked through an ether linkage and the other two polymers contained a trifluoromethyl biphenyl diamine. The polymers were shown to retain a high level of transparency in the visible region following radiolysis to doses as high as 8 Gy. ESR studies of the resistance to radical formation on radiolysis. at 77 K revealed that the polymers containing ether linkages were more stable than their fluorinated analogues, but all were less stable than Kapton (R). (C) 2001 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)189-194
Number of pages6
JournalRadiation Physics and Chemistry
Issue number1
Publication statusPublished - Jul 2001
Externally publishedYes
EventPacifichem 2000 Meeting - HONOLULU
Duration: 14 Dec 200019 Dec 2000


  • transparent polyimides
  • radiation sensitivity
  • UV spectroscopy
  • ESR spectroscopy
  • radical yields

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