摘要
聚磷酸铵-聚对苯二甲酰乙二胺(APP-PETA),聚磷酸铵-聚对苯二甲酰己二胺(APP-PA6T)和聚磷酸铵-聚对苯二甲酰对苯二胺(APP-PPTA)膨胀阻燃体系在添加量为30%或者更多的时候,对ABS材料有良好的阻燃效果,但是一旦添加量少于30%,这3个体系就无法使ABS保持良好的阻燃性。为了提高这类膨胀阻燃剂的阻燃效率,在这类阻燃体系中引入第二酸源红磷,通过分析其阻燃效果和残炭红外后,选择PETA和PPTA 2种酰胺作为成炭剂,APP和红磷作为酸源,组成双阶膨胀阻燃剂。双阶阻燃剂对ABS有良好的阻燃效果,30%的添加量能使树脂氧指数达到34并通过V-0级测试,20%时仍可以使材料保持27的氧指数并通过V-0级测试。残炭红外分析显示,双阶阻燃剂内部有协效反应,可以使得阻燃作用时间延长。碳层宏观形貌显示阻燃剂有膨胀和收缩过程两段,第二段能使碳层更致密。阻燃ABS完全燃烧残留层SEM图显示,30%和20%的共混阻燃剂可以形成均匀致密的碳层保护层,给予ABS良好的阻燃性能。
In order to improve the flame retardant efficiency of APP - PETA, APP - PA6T and APP - PPTA system on acrylonitrile-bu tadiene-styrene （ABS） resin , red phosphorus was introduced to play as the second acid source. The effect and FTIR spectrum of flame retardant residue of these systems were analyzed, and PETA and PPTA were chosen as char agent, APP and red phosphorus as acid source to form the flame retardant. When the mass fraction of two-stage flame retardant was 30%, the LOI of flame retardant ABS was 34 and UL -94 vertical burning test reached V -0, even when the loading decreased to 20% , the LOI values still has 27 and past the V - 0 test. FTIR spectrum of two-stage flame retardant residue suggested that there was a distinct cooperation which prolong the working time. The macroscopical structure of char layer showed this flame retardant had two work processes, swollen and shrunk, the second process made char layer more compact,The ABS composites SEM photograph after completely combustion showed that two-stage flame retardant would form compact char layer when mass fraction was 30% or 20%, and this endow ABS good flame retardancy.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2013年第3期133-139,共7页
Journal of Sichuan University (Engineering Science Edition)
关键词
ABS
两阶段
膨缩型阻燃剂
成炭剂
ABS
two stages
intumescent-contractive flame retardant
char agent
