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本文用DSC技术研究了物理老化对PEK-C、PES-C及其共混物和复合材料玻璃化转变的影响.老化时间(t)延长,玻璃化转变温度(T_g)、热焓松弛峰温(T_(max))、峰高(△C_(pmax))和热焓(△H)提高;△H与lgt成线性关系.碳黑或碳纤维对PES-C的物理老化行为无影响,而反应性乙炔端基砜(ATS)固化物能限制PEK-C和PES-C在T_g以下温度的物理老化过程.利用物理老化能更为方便地判断多相体系的相容性,结果表明PEK-C/PSF为相容体系,而PEK-C/PES-C相容性较差.
In this paper, the effects of physical aging on the glass transition of PEK-C, PES-C and its blends and composites were studied by means of DSC.The aging time (t), glass transition temperature (T_g), enthalpy relaxation peak temperature (T max), peak height (△ C pmax) and enthalpy (△ H) increased. △ H was linear with lgt. Carbon black or carbon fiber had no effect on the physical aging behavior of PES- The physical aging of PEK-C and PES-C can be limited by the curing of sex-acetylene-terminated sulfone (ATS) .The physical aging can be used to judge the compatibility of multi-phase system more easily. The results show that PEK-C / PSF is a compatible system, while PEK-C / PES-C is less compatible.