添加剂对ABS/APP/PETA体系协同阻燃作用的研究  

Synergistic Flame Retardant Effect of Adjuvant on the ABS/APP/PETA System

作　　者：易江松[1] 鲁成祥[1] 任显诚[1] 蔡绪福[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《高校化学工程学报》2011年第2期319-324,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(50973066)

摘　　要：为了提高膨胀型阻燃体系聚磷酸胺(APP)/聚对苯二甲酰乙二胺(PETA)对苯乙烯-丁二烯-丙烯腈共聚物(ABS)的阻燃效果,并研究一些常用添加剂的协效阻燃机理,采用极限氧指数法、垂直燃烧法、热失重探讨了添加剂4A分子筛、次磷酸铝、有机蒙脱土(OMMT)和双噁唑啉(BOZ)对ABS/APP/PETA膨胀型阻燃复合物的协效阻燃效应。结果表明,这些添加剂显著地改善了ABS/APP/PETA体系的阻燃性能。当四种添加剂分别以2%(wt)的用量加入到ABS/APP/PETA(70/25/5)体系中时,阻燃复合物的极限氧指数由未加添加剂的29分别提高到32、33、32及30,UL-94测定都能达到V-0级。热失重分析表明添加剂的加入提高了阻燃体系的热稳定性和高温残炭率。进而分析了协效阻燃机理。In order to improve the flame retardant effect of the intumescent flame retarder consisting of ammonium polyphosphate（APP） and poly（p-ethylene terephthalamide（PETA） on the flaming acrylonitrile-butadiene-styrene copolymer（ABS）,some commonly used adjuvants,such as the zeolite 4A（4A）,aluminum phosphinate（AlPi）,organic montmorillonite（OMMT） and 2,2＇-bis（2-oxazoline）（BOZ）,were used separately with the ABS/APP/PETA flame retardant system.The mechanism of the flame retardant enhancement caused by the synergistic flame retardant effect of the adjuvants added was investigated by the limiting oxygen index（LOI） and by the help of UL-94（vertical flame） test,thermogravimetric analysis（TGA）.The results show that the flame retardation of ABS/APP/PETA system can be significantly improved by incorporating with the addition of adjuvant（Adj）.Without adding adjuvant,the LOI value of the intumescent flame retardant system ABS/APP/PETA is 29,and after adding 2%（wt） adjuvant of 4A,AlPi,OMMT and BOZ separately,the LOI values of the ABS/APP/PETA/Adj（70/25/5/2） system increase to 32,33,32 and 30,respectively;Besides,all the ABS/APP/PETA/Adj systems with above Adj are identified as V-0 in the UL-94 test.The results of TGA demonstrate that the synergism of the adjuvant is effective in enhancing the thermal stability and the char residue ratio of the ABS/APP/PETA/Adj system;and the oxygen could modify the carbonaceous structure and influent the thermal degradation of the system.Finally,the synergistic flame retardant mechanism was given.

关 键 词：添加剂 ABS/APP/PETA 膨胀型阻燃 协效阻燃机理 

分 类 号：TQ314.248[化学工程—高聚物工业]