Al(OH)_3-磷杂化聚合物/聚苯乙烯复合材料的协同阻燃效应

Synergistic Flame-Retardant Effect of Nano Al(OH)_3-Phosphorus Hybrid Polymer/Polystyrene Composite

采用二氯磷酸苯酯(PDCP)、乙二醇(EG)、甲醇为原料,经逐步聚合得到磷元素杂化聚合物(OPP),将OPP和氢氧化铝(ATH)与聚苯乙烯(PS)掺杂共混制备氢氧化铝-磷元素杂化聚合物/聚苯乙烯阻燃复合材料(ATH-OPP/PS)。利用FTIR、凝胶渗透色谱(GPC)表征OPP的结构及平均分子量,通过热重分析、极限氧指数(LOI)和微型量热仪、扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)对复合材料及炭层进行分析,利用Flynn-Wall-Ozawa(FWO)法计算ATH-OPP/PS的热降解活化能(Ea)。结果表明,ATH-OPP体系能协同提高复合材料的热稳定性和LOI,降低复合材料的总热释放量(THR)和热释放速率峰值(PHRR),Ea随降解转化率增大而增大。

The phosphorus element hybrid polymer（OPP）was synthesized by step-reaction polymerization using phenyl dichlorophosphate（PDCP）,ethylene glycol（EG）,methanol,and the aluminum hydroxide-phosphorus hybrid polymer/polystyrene flame retardant composite（ATH-OPP/PS）were prepared by mixing nano-aluminum hydroxide（ATH）and OPP into polystyrene（PS）.The structural characteristics and average molecular weight of OPP were explored by FT-IR and gel permeation chromatography（GPC）.The thermal stability and flame-retardant properties of the composites were evaluated by TGA,limit oxygen index（LOI）,microscale combustion calorimeter,SEM and XPS.The thermal decomposition activation energy（Ea）of composites were calculated by Flynn-Wall-Ozawa（FWO）method.The results show that thermal stability and LOI were improved and peak heat release rate（PHRR）and total heat release（THR）reduced due to ATH/OPP as retarded system.Eaincreased with the increase of degradation conversion rate.