阻燃剂三季戊四醇磷酸酯/聚磷酸铵的热解与成炭机理  

Thermal Degradation and Carbonization Mechanism of Three Pentaerythritol Phosphates/Ammonium Polyphosphate as Flame Retardant

作　　者：丁率[1,2] 彭辉[1] 刘国胜[1] 郝建薇[1] 蒋伟中[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]中国石化北京化工研究院,北京100013

出　　处：《石油化工》2014年第10期1173-1178,共6页Petrochemical Technology

基　　金：国家科技支撑计划项目资助项目(2006BAE03B05-2)

摘　　要：将阻燃剂三季戊四醇磷酸酯——三(1-氧代-1-磷杂-2,6,7-三氧杂双环[2.2.2]辛烷-4-亚甲基)磷酸酯(简称Trimer)和聚磷酸铵(APP)均匀混合,制得复合阻燃剂Trimer/APP;采用TG,FTIR,XPS等方法研究了Trimer/APP的热解成炭机理。表征及分析结果表明,Trimer与APP之间的相互作用促进二者交联成炭,导致800℃时的残炭量较多;Trimer与APP混合后,热解过程中出现明显的膨胀现象,且在较低温度下即可明显地脱水成炭,有利于提高高聚物的阻燃性能;APP催化Trimer脱水成炭,APP中N元素增强了碳质化合物的热稳定性;APP的存在改变了Trimer的热解过程,且在高温下生成耐热的P—O—N键和C—N键,使其高温残炭量明显提高。A composite flame retardant,the blend of tri（1-oxo-2,6,7-trioxa-l-phosphabicyclo [2,2,2] octane-methyl） phosphate（Trimer） and ammonium polyphosphate（APP）（Trimer/APP）,was prepared,and its thermal degradation and carbonization mechanism were studied by TG,FTIR and XPS.The TG result showed that the interaction between Trimer and APP accelerated char forming at 800 ℃.The morphology images indicated that Trimer/APP degraded at low temperature and an intumescent phenomenon was observed during the degradation process,which might be beneficial to its application in polymers.The FTIR result confirmed that APP catalyzed the dehydration and charring of Trimer,and the presence of N in APP enhanced the thermostability of the carbonaceous compound.The XPS result showed that APP changed the thermal degradation process of Trimer.The bonds of P-O-N and C-N were formed at high temperature which significantly increased the char residue amount.

关 键 词：阻燃剂 三季戊四醇磷酸酯 聚磷酸铵 热解 碳化 

分 类 号：TQ314.248[化学工程—高聚物工业]