环氧树脂和ZnO对微胶囊红磷阻燃HIPS体系影响

Effect of epoxy and zinc oxide on flame retardancy of HIPS with micro-capsulated red phosphorus

研究了环氧树脂和ZnO对微胶囊红磷阻燃高抗冲聚苯乙烯(HIPS)性能的影响。结果表明,当微胶囊红磷用量为8 phr时,随着环氧树脂用量的增加,HIPS的阻燃性能提高;当环氧树脂用量大于20 phr时,阻燃HIPS 的垂直燃烧达到UL 94 V-0级,极限氧指数(LOI)为28．8％。在微胶囊红磷-环氧树脂复合阻燃HIPS体系中添加 ZnO具有阻燃协同作用,仅需加入2 phr。的ZnO就能使微胶囊红磷／环氧树脂质量比为8:15的阻燃HIPS体系垂直燃烧达到UL 94 V-O级,LOI也可达到29．2％。

This paper studied effect of epoxy and zinc oxide on flame retardancy of high impact polystyrene （HIPS） containing micro-capsulated red phosphorus. The results reveal that the flame-retardant properties of the HIPS enhance with the increase of epoxy content when dosage of micro-capsulated red phosphorus is 8 phr. The vertical combustion level and limiting oxygen index （LOI） of the flame-retardant HIPS reaches UL 94 V-0 and 28.8% respectively when the epoxy content is higher than 20 phr. A synergistic effect is found after incorporating zinc oxide into the flame-retardant composite consisting of epoxy and micro-capsulated red phosphorus. Adding 2 phr zinc oxide into the composite, in which the ratio of micro-capsulated red phosphorus to epoxy resin equals to 8/15, can make the flame-retardant HIPS attain vertical combustion level of UL 94 V-0 and LOI of 29.2%.