聚丙烯/煤矸石复合材料热降解动力学研究  

Kinetics of thermal degradation of polypropylene/coal gangue powder composite

作　　者：贺超峰[1] 何小芳[1] 夏少旭[1] 曾桂华[1] 曹新鑫[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《化工新型材料》2014年第10期127-130,133,共5页New Chemical Materials

基　　金：河南省安全生产科技发展计划(H12-089);河南理工大学博士基金(B2013-010);国家级大学生创新创业训练计划项目(201310460038)

摘　　要：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。To improve the thermal property of polypropylene（PP）,the polypropylene/coal gangue（PP/CG）compos ires were prepared from CG and PP by melt-blending method. The different methods such as thermogravimetry analysis （TGA）, differential thermogravimetry analysis （DTG）, Kissinger method, Flynn-Wall Ozawa and Friedman method were used to characterize the thermal property of composites. The results showed that the composites had only one-stage thermal degradation process. The CG＂ presence caused a shift of the initial mass 10ss temperature To and the temperature of maxi- mum rate of weight loss Tm to higher temperatures. The activation energies（Ea）changed as the PP/CG content changed. The maximum Eo was achieved when the mass fraction of CG in composites was up to 20%, which was higher（20.29kJ/ mol）than pure PP.

关 键 词：煤矸石 聚丙烯 热降解 动力学 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]