蒙脱土协同膨胀阻燃聚丙烯的热降解机理  

Thermal Degradation Mechanism of Montmorillonite Synergistic Intumescent Flame Retardant Polypropylenes

作　　者：刘国胜[1,2] 郝建薇[1] 周友[1] 

机构地区：[1]北京理工大学阻燃材料研究国家专业实验室,北京100081 [2]北京市丰台区公安消防支队,北京100039

出　　处：《高分子材料科学与工程》2013年第9期68-72,共5页Polymer Materials Science & Engineering

摘　　要：层状纳米填料蒙脱土(MMT)与聚磷酸铵(APP)/双季戊四醇(DPER)结合膨胀阻燃聚丙烯(PP),提高了PP/APP/DPER膨胀阻燃材料的阻燃性能。采用热失重分析(TG)研究了MMT对APP/PER及APP阻燃剂体系热降解行为的影响;采用X射线光电子能谱(XPS)研究了MMT与APP之间热降解过程中的成炭化学作用。结果表明,添加MMT后,APP/DPER、APP在800℃的残余量分别提高12.3%和14.5%,其贡献以MMT与APP间的相互作用为主;MMT与APP发生成炭化学反应,生成Si-O-P键,增加了APP高温分解稳定性。The combination between montmorillonite （MMT） and ammonium polyphosphate （APP）/ dipentaerythritol （DPER） used in intumescent flame retardant PP leaded to improvement of flame retardant properties of APP/DPER/PP intumescent flame retardant materials. The influence of MMT on thermal degradation behavior of APP/DPER and APP was assessed by thermogravimetric analysis （TGA）, and the char formation interactions between MMT and APP were investigated by X-ray photoelectron spectrum （XPS）. The results show that by adding MMT, the residue of 800℃ for APP/DPER and APP are increased by 12.3% and 14.5%, respectively, which mainly is dominated by the interaction between MMT and APP. This interaction leads to the formation of Si - O- P bond, and the decomposition stability of APP at high temperature is increased.

关 键 词：蒙脱土 聚磷酸铵 膨胀阻燃 聚丙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]