Fig. 5
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Évolution des concentrations en alcools (a) et en liaisons C–H (b) au cours du vieillissement thermique du PEI sous une pression de 0,21 bar (en violet), 0,4 bar (noir), 1 bar (rouge), 3 bars (orange) et 5 bars d’oxygène (vert) à 220 °C.
Changes in the concentrations of alcohols (a) and C–H bonds (b) during the thermal ageing of PEI under an oxygen pressure of 0.21 bar (in violet), 0.4 bar (black), 1 bar (red), 3 bars (orange) and 5 bars (green) at 220 °C.
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