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New Developments in the Field of Radiochemical Ageing of Aromatic Polymers

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Academic year: 2021

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Fig. 1. Reaction of H- and Y- crosslinking.
Fig. 2. Concentration in radicals versus dose measured in PPO (  ), Kevlar (  ), PSU (  ),  PEPO (), Ultem (), Kapton (), PEEK () in aromatic polymers under 1 - 5 kGy h -1  dose rate at 77 K (Heiland et al., 1996)
Fig. 2 indicates the existence of an asymptote characterizing a steady-state at which the  concentration in radicals is:
Table 2. Yields for radical build-up for aromatic polymers irradiated under 1 - 5 kGy h -1  dose  rate at 77 K
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