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采用非等温DSC方法研究了不同升温速率下聚砜(PSF/)酚醛树脂(PF)共混体系的固化动力学,运用Kissinger方法和Crane方程计算PSF/PF共混体系的活化能(Ea)及固化反应级数,并利用KAS等转化率法分析热塑性PF的固化机理及PSF对PF固化反应动力学的影响。结果表明:PSF的加入降低了PSF/PF共混体系固化反应的Ea值,当PSF含量为10%时,共混体系的Ea值最小;热塑性PF的固化过程比较复杂,Ea值随着转化率变化而改变;PSF的加入加剧了低转化率下PSF/PF共混体系Ea值的下降趋势,并使得其在高转化率下的固化机理与纯PF不同。
The non-isothermal DSC method was used to study the curing kinetics of PSF / PF blend system. The Kissinger method and Crane equation were used to calculate the activation energy (Ea) of PSF / PF blends. Curing reaction series, and the use of KAS conversion rate analysis of the curing mechanism of the thermoplastic PF and PSF PF curing kinetics. The results showed that the addition of PSF reduced the Ea value of the curing reaction of the PSF / PF blend system. When the PSF content was 10%, the Ea value of the blends was the smallest. The curing process of the thermoplastic PF was rather complicated. The Ea value decreased with the conversion rate The addition of PSF aggravates the downward trend of Ea value of PSF / PF blends at low conversions, and makes the solidification mechanism at high conversions different from pure PF.