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DSC results of heating a sample of 60/40 T/I PEKK MCO (7) with a CsF initiator to 250 °C and then cooling and subsequently heating to 300 °C and cooling again, showing (A) Tg on the initial heat ramp, with the appearance of a glass transition when heated above 250 °C on the cooling response in and (B) in both the heat and cooling response.
