聚乙烯/微胶囊红磷阻燃木塑材料的性能研究  

Properties of Microencapsulated Red Phosphorus Flame Retardant Wood Plastic Composites

作　　者：魏占锋 郭玉花[1] 马舒慧 赵珂艺 李易蔚 Wei Zhanfeng;Guo Yuhua;Ma Shuhui;Zhao Keyi;Li Yiwei(Department of Packaging Engineering,Tianjin University of Commerce,Tianjin,300134)

机构地区：[1]天津商业大学包装工程系,天津300134

出　　处：《现代塑料加工应用》2021年第3期18-21,共4页Modern Plastics Processing and Applications

基　　金：天津市自然科学基金企业科技特派员项目(17JCTPJC53600);天津市大学生创新创业训练项目(202010069049)。

摘　　要：通过二次挤出造粒和注射成型,将微胶囊红磷(HP)、松木粉、低密度聚乙烯(LDPE)、线性低密度聚乙烯(LLDPE)按照一定比例共混,制备阻燃木塑复合材料(HP-WPC)。测定HP-WPC的极限氧指数、热重谱图,并采用Flynn-Wall-Ozawa(FWO)法对木塑复合材料的热分解动力学进行研究。结果表明:和未添加HP的木塑复合材料相比,当HP添加量为PE总量的10%时,复合材料的极限氧指数由22.5%上升到28.7%,阻燃级别达到UL94 V-0级,外推初始分解温度、最大失重速率温度和外推终止温度分别提高了42,42,34℃;转化率在0.4~0.7时,复合材料的表观活化能随转化率的增大而增大,热分解越来越困难,耐热性显著提高。Flame retardant wood plastic composite(HP-WPC)was prepared by mixing microencapsulated red phosphorus(HP),pine powder,low density polyethylene(LDPE)and linear low density polyethylene(LLDPE)in a certain proportion by secondary extrusion granulation and injection molding.The limiting oxygen index and thermogravimetry of HP-WPC were measured,and the thermal decomposition kinetics of HP-WPC was studied by FWO method.The results show that compared with WPC composites without HP,when HP addition is 10%of the total amount of PE,the limiting oxygen index of the composite increases from 22.5%to 28.7%,and the flame retardant grade reaches UL94 V-0.The extrapolated initial decomposition temperature,maximum mass loss rate temperature and extrapolated termination temperature of the composite were increased by 42,42,34℃,respectively.When the conversion rate is between 0.4 and 0.7,the apparent activation energy of the composite increases with the increase of the conversion rate,and the thermal decomposition becomes more and more difficult,and the heat resistance is significantly improved.

关 键 词：低密度聚乙烯 微胶囊红磷 阻燃 木塑复合材料 耐热性 热分解动力学 

分 类 号：TQ3[化学工程]