摘要
采用湿化学浸渍法将反应型磷-氮多元醇(DHP,N,N-双(2-羟乙基)氨基亚甲基膦酸二乙酯)与膨胀石墨(EG)混合,制备了DHP-EG阻燃剂。显著提高了DHP-EG在多元醇原料中的分散稳定性,降低了阻燃多元醇体系的黏度。在表征DHP-EG中组分相互作用的基础上,研究了DHP-EG对硬质聚氨酯泡沫(RPUF)隔热、吸水、压缩强度及阻燃性能的影响。结果表明,15%DHP-EG(DHP与EG的质量比为1∶2)阻燃RPUF表现了良好的协同作用。阻燃RPUF的泡孔分布趋向均匀,导热系数低至0.0237 W/(m·K),吸水率及压缩强度分别为1.52%和0.24 MPa。与纯RPUF比较,阻燃RPUF氧指数由20.1%提高到了28.3%,热释放速率峰值与总烟释放量分别降低了53%和73%。文中采用湿化学浸渍法将反应型与添加型阻燃剂相结合,为提高阻燃RPUF综合应用性能提供了参考。
Through the interaction between a reactive phosphorus flame retardant(diethyl bis(2-hydroxyethyl)aminomethylphosphonate,DHP)and expandable graphite(EG)via wet chemistry approaches,a novel flame retardant DHP-EG was prepared.The effect of this interaction was characterized by rotational rheometer and Fourier transform infrared spectroscopy(FT-IR).The results indicate that the dispersion stability of DHP-EG in polyether and polyester polyols is improved apparently.Meanwhile,the viscosity of the flame-retardancy polyols is reduced dramatically.In addition,the influence on the cell structure,thermal insulation,water absorption,compressive strength and flame retardancy of rigid polyurethane foams(RPUF)was investigated.The results show that 15%DHP-EG(the mass ratio of 1∶2)has great synergetic effect.The cellular distribution of this sample is the most homogeneous with a smaller cell diameter compared with other flame-retardancy RPUF,and then the thermal conductivity of the sample is as low as 0.0237 W/(m·K).In addition,the water absorption rate and compressive strength of the sample are 1.52%and 0.24 MPa respectively.Relative to pure RPUF,the limit oxygen index(LOI)of flame-retardancy RPUF is increased from 20.1%to 28.3%.Meanwhile,the cone calorimeter testing results show that the peak heat release rate and total smoke release are reduced by 53%and 73%respectively.
作者
李齐敏
王靖宇
陈腊梅
郝建薇
Qimin Li;Jingyu Wang;Lamei Chen;Jianwei Hao(School of Materials Science & Engineering,National Engineering Technology Research Center of Flame Retardant Materials,Beijing Institute of Technology,Beijing 100081,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第5期57-62,70,共7页
Polymer Materials Science & Engineering
基金
国家重点研发计划(2016YFB0302104)
关键词
硬质聚氨酯泡沫
反应型阻燃剂
可膨胀石墨
阻燃
导热系数
rigid polyurethane foam
reactive flame retardant
expandable graphite
flame retardancy
thermal conductivity