中国塑料2018，Vol.32Issue(3)：37-43,7.DOI:10.19491/j.issn.1001-9278.2018.03.007
典型添加型磷酸酯/可膨胀石墨阻燃聚氨酯泡沫行为研究
Flame-retardant Behaviors of Polyurethane Foams Containing Expandable Graphite and Phosphates as Typical Add-type Flame Retardants
摘要
Abstract
Three types of phosphates,dimethyl phosphate (DP),(5-ethyl-2-methyl-1,3,2-dioxaphosphorinan-5-yl) methyl dimethyl phosphonate P-oxide (EMD) and dimethyl methylphosphonate (DMMP) were used as typical add-type flame retardants for the flame retardancy of rigid polyurethane foam (RPUF),and expandable graphite (EG) was also added as a flame-retardant additive.The flame-retardant behaviors and mechanisms of the resulting composite foams were investigated.The results indicated that the composite foams containing DMMP and DP exhibited greater limiting oxygen indices than that containing EMD at the same content of phosphate flame retardant.The composite foam containing DMMP also presented the lowest heat release and total heat release rates.Owing to the oxidation reaction of DP during combustion,the heat release rate increased,resulting in a reduction in flame-retardant effect.Although EMD could be decomposed into DMMP molecules during combustion,its flame retardant efficiency was lower than that of DMMP due to a low content of phosphorus.DMMP exhibited the best flame-retardant effect due to its high phosphorus content and high flame retardant efficiency in both gas and condensed phases.关键词
阻燃剂/聚氨酯泡沫/可膨胀石墨/磷酸酯Key words
flame retardant/polyurethane foam/expandable graphite/phosphate分类
化学化工引用本文复制引用
王泽,李林洁,许博,钱立军..典型添加型磷酸酯/可膨胀石墨阻燃聚氨酯泡沫行为研究[J].中国塑料,2018,32(3):37-43,7.基金项目
国家重点研发计划(2016YFB0302104) （2016YFB0302104）
北京市创新能力提升计划(TSJHG201510011021) （TSJHG201510011021）
