采用超临界正丁醇在KOH作用下从碳纤维/环氧树脂(CF/EP)复合材料中回收高性能CF.分析了反应温度和反应时间对CF/EP复合材料中EP降解率的影响,研究了回收CF增强聚丙烯(PP)复合材料的力学性能;分析了降解液相产物组分,研究了EP固化体系在超临界正丁醇中的催化降解历程,建立了降解动力学模型,通过解算动力学参数建立了催化降解动力学方程.结果表明:反应温度和反应时间与EP的降解率呈明显的正相关性;与原CF增强PP复合材料相比,回收CF增强PP复合材料的拉伸强度下降9.2％,弯曲强度下降20.9％,弯曲模量下降10.9％,冲击强度下降7.4％;CF/EP复合材料降解反应主要为EP固化体系分子链段中C-C、—O—等线性链段的断裂以及交联部位C-N的断裂;CF/EP复合材料催化降解的反应级数为2,反应活化能为165.2 kJ·mol-1,指前因子为3.62×1013 min-1,建立的动力学方程可解决反应温度和反应时间不可预估的问题.
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