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>Radiostability of polybenzoxazoles. Comparison of stability of molecular ions of model compounds in mass spectrometry with resistance of the polymers to ionizing radiations
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Radiostability of polybenzoxazoles. Comparison of stability of molecular ions of model compounds in mass spectrometry with resistance of the polymers to ionizing radiations
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机译：Radiostability of polybenzoxazoles. Comparison of stability of molecular ions of model compounds in mass spectrometry with resistance of the polymers to ionizing radiations
AbstractVarious benzoxazoles were synthesized and investigated by mass spectrometry. The relative stabilities of their molecular ions were used in the search for radiostable polybenzoxazoles (PBO). The three polybenzoxazoles corresponding to the three bibenzoxazoles previously investigated were irradiated by 900 ke V electrons, and their aging was followed in situ by optical measurements. The most radiostable polymer coresponds to the model compound (diphenylbibenzoxazole), which is characterized by the highest degree of conjugation and by the lowest number of fragmentations in mass spectrometry. The resistance of this new polymer to electron irradiation is better than that of Teflon FEP or Kapton H.
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