本质阻燃聚苯乙烯/蒙脱土纳米复合物的制备及性能

Preparation and Property of Inherent Flame Retardant Polystyrene /Clay Nanocomposites

通过原位聚合法制备了本质阻燃聚苯乙烯[P(St-co-AEPPA)]/有机改性蒙脱土(OMMT)纳米复合物[P(St-co-AEPPA)/OMMT],并用普通聚苯乙烯/有机改性蒙脱土(PS/OMMT)复合物作为对比实验,研究了含磷、氮单体丙烯酸羟乙基-苯氧基-二乙基磷酰胺(AEPPA)和OMMT等添加物对本质阻燃聚苯乙烯性能的影响.用X射线衍射仪(XRD)和透射电子显微镜(TEM)分析了复合材料的结构与形貌,并对OMMT在基体中的分散机理进行了讨论.用差示扫描量热仪(DSC)、热重分析(TGA)和微型量热仪(MCC)研究了材料的热性能和燃烧性能.结果表明,AEPPA和OMMT能够显著提高基体的热稳定性和阻燃性.

Inherent flame retardant styrenic copolymer/organic modified montmorillonite （OMMT） nanocom- posites [ P （St-co-AEPPA）/OMMT ] were prepared by in situ bulk copolymerization. Ordinary polystyrene/or- ganic modified montmorillonite nanocomposites（PS/OMMT） were prepared as comparative experiments. Effect of phosphorus-nitrogen containing monomer （AEPPA） and OMMT on styrenic copolymer was studied. The structure and morphology of nanocomposites were characterized by X-ray diffraction （XRD） and transmission electron microscopy（TEM）, and the dispersion mechanism of OMMT in matrix was discussed. Differential scanning calorimetry（ DSC ）, thermogravimetric analysis（TGA） and microscale combustion calorimeter（ MCC ） were used to research the thermal properties and flammability of composites. The results showed that the incor- poration of AEPPA monomer and OMMT could significantly improve the thermal stability and flame retardancy of matrix.