摘要
以聚磷酸铵(APP)、三嗪系成炭发泡剂(CFA)和4A分子筛(4AZEO)作为乙烯-醋酸乙烯酯共聚物(EVA)的膨胀阻燃剂(IFR)。采用氧指数、垂直燃烧研究了APP与CFA的不同配比、IFR不同添加量对阻燃材料阻燃性能的影响,并对其力学性能进行测试。当IFR总添加量为28%,APP/CFA质量比为3∶1时阻燃EVA材料显示出较好的阻燃效果,其氧指数为33.8,垂直燃烧达到UL-94V0级。采用热失重法证实了配比合理的膨胀阻燃剂能够促进EVA在高温时的成炭,最后采用扫描电镜法对残炭外貌进行了表征。
Flame retardancy of ethylene-vinyl acetate copolymer （EVA） using ammonium polyphosphate （APP）, charing-foaming agent （CFA） and 4A Zeolites （4AZEO） as intumescent flame retardants （IFR） was investigated. The influence of IFR contents and the ratio of APP and CFA on limiting oxygen index （LOI）, UL 94 rating of EVA/IFR composites have been studied. It is found that the flame retardancy of the composites increases with increasing IFR contents, and the composite at the mass ratio of APP/CFA= 3：1 at the same loading 28% shows the best flame retardant performance. The TGA shows that IFR with the suitable ratio of APP/CFA can enhance the thermal stability of the flame retardant EVA copolymer. The SEM shows that the EVA/IFR composites on burning can form dense and compact char, making them have the excellent flame retardancy. And the mechanical properties of EVA/IFR composites were studied too.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第9期109-112,共4页
Polymer Materials Science & Engineering
基金
国家科技“十一五”支撑计划(2006BAE03B05,207BAE27B02)
哈尔滨科技攻关重点项目(2006AA4CG024)资助
关键词
膨胀阻燃
乙烯-醋酸乙烯酯共聚物
热降解
力学性能
intumescent flame retardant
ethylene-vinyl acetate copolymer
thermal degradation
mechanicalproperties
