摘要
以三氯氧磷和新戊二醇等为原料,合成了一种新型磷氮型季铵盐(PAHAC),通过红外光谱(FTIR)、核磁共振氢谱(1H-NMR)和高分辨质谱(HRMS)表征化合物结构。利用PAHAC与钠基蒙脱土(Na-MMT)离子交换反应制备有机磷氮系-蒙脱土阻燃剂(PAHAC-MMT)。FTIR和X射线衍射(XRD)研究表明:PAHAC通过离子交换对蒙脱土进行了有机化改性,经20%质量分数的PAHAC改性后的MMT(20%PAHAC-MMT)层间距增至1.87 nm,20%PAHAC-MMT的热分解温度在310℃以上。透射电镜(TEM)分析结果表明,20%PAHAC-MMT经LDPE熔融插层,形成了插层-剥离型纳米复合材料。锥形量热测试结果表明有机磷氮系-蒙脱土/LDPE纳米复合材料具有良好的阻燃性能,其中20%PAHAC-MMT(7%)/LDPE的热释放速率峰值(PHRR)比LDPE降低了21%,热释放总量(THR)下降了9.5%。炭层的扫描电镜(SEM)分析结果表明,20%PAHAC-MMT/LDPE燃烧后能形成致密的炭层,起到良好的阻燃作用。
A novel phosphorus-nitrogen quaternary ammonium salts（PAHAC） was synthesized with phoshorus oxychloride and neopentyl glycol as main raw materials.PAHAC was characterized by FTIR,1H-NMR and HRMS.Montmorillonite（MMT） modified with PAHAC（PAHAC-MMT） was prepared by ion-exchanging of Na＋-montmorillonite（Na-MMT） and PAHAC.FTIR and XRD indicate that PAHAC is intercalated with Na-MMT and the layer spacing and the decomposition temperature of MMT modified with 20wt% PAHAC（20%PAHAC-MMT） is 1.87nm and 310℃,respectively.The results of TEM show that the intercalated-exploitated nanocomposite of 20%PAHAC-MMT/LDPE is formed by melting intercalation blending LDPE with 20%PAHAC-MMT.The flame retardancy of phosphorus-nitrogen-montmorillonite/LDPE nanocomposites was investigated by cone calorimeter test.The results show that the flame retardancy properties of phosphorus-nitrogen-montmorillonite/LDPE nanocomposites are good.In comparison with LDPE,the peak heat release rates（PHRR） and the total heat release（THR） of 20%PAHAC-MMT（7%）/LDPE reduce by 21% and 9.5%,respectively.The results of SEM show that the compact and dense char is formed for 20%PAHAC-MMT/LDPE nanocomposite after combustion,which can inhibit burning effectively.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2010年第6期45-52,共8页
Acta Materiae Compositae Sinica
基金
浙江省重中之重学科开放基金(20090519)
关键词
磷氮型
蒙脱土
阻燃剂
纳米复合材料
phosphorus-nitrogen
montmorillonite
flame retardant
nanocomposite
