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通过熔融共混制备了聚丙烯/煤矸石(PP/CG)复合材料,并采用热重分析(TG-DTG)法研究了共混体系的热降解动力学,利用Kissinger法、Flynn-Wall-Ozawa法和Friedman法计算了共混体系的表观活化能。结果表明:共混体系的热降解均表现为单一个失重阶段的降解过程,说明CG与基体PP之间具有良好的相容性;随CG质量分数增加共混体系的起始降解温度(To)和最大失重速率温度(Tm)呈升高趋势,说明体系热稳定性逐渐提高;共混体系的活化能随CG的添加量变化,共混体系的活化能在煤矸石含量为20%达到最大值,比纯PP提高了20.29kJ/mol。
The polypropylene / coal gangue (PP / CG) composites were prepared by melt blending, and the thermal degradation kinetics of the blends were studied by TG-DTG. The Kissinger method, Flynn-Wall-Ozawa The apparent activation energy of the blends was calculated by the method of Friedman and Friedman method. The results showed that the thermal degradation of the blends showed a single degradation stage, indicating that CG had good compatibility with matrix PP. The initial degradation temperature (To) And the maximum weight loss rate (Tm) showed an increasing trend, indicating that the thermal stability of the system gradually increased. The activation energy of the blend system varied with the amount of CG added. The activation energy of the blend system reached a maximum at a coal gangue content of 20% , Which is 20.29kJ / mol higher than pure PP.