MAI Kan-cheng, ZENG Han-min, ZHANG Ming-qiu. EFFECTS OF PHYSICAL AGEING ON THE ENTHALPY RELAXATION CHARACTERISTICS OF GLASS TRANSITION OF PEK-C, PES-C AND THEIR COMPOSITES[J]. Acta Polymerica Sinica, 1993,(1):53-60.
MAI Kan-cheng, ZENG Han-min, ZHANG Ming-qiu. EFFECTS OF PHYSICAL AGEING ON THE ENTHALPY RELAXATION CHARACTERISTICS OF GLASS TRANSITION OF PEK-C, PES-C AND THEIR COMPOSITES[J]. Acta Polymerica Sinica, 1993,(1):53-60.DOI:
Effects of physical ageing on glass transition of phenolphthalein polyaryletherketone (PEK-C)
phenolphthalein polyarylethersulfone (PES-C) and their blends and composites have been studied by differential scanning calorimetry (DSC). As the ageing time increases
the values of Tg
the peak temperature (Tmax)
the peak height (△Cp max) and enthalpy (△H) of the enthalpy relaxation process increase
△H is proportional to 1gt. The ageing behaviour remained unaffected by addition of carbon black and short carbonfiber
but reactive oligomer ace-tylene-terminated sulfone (ATS) restricted the ageing process remarkably. It is easy to deter-mine the compability of multiphase systemsby the physical ageing at temperature below Tg.The results show that PEK-C/PSF blend is a compatible system and PEKC/PES-C is a par tially compatible system.