不同基材聚氨酯泡沫的热稳定性和燃烧性能研究  

Study on the thermal stability and combustion performance of polyurethane foams with different substrates

作　　者：李捍东 张旭[1,2] Li Handong;Zhang Xu(Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology,Shenyang Aerospace University,Shenyang 110136;School of Safety Engineering,Shenyang Aerospace University,Shenyang 110136)

机构地区：[1]沈阳航空航天大学,辽宁省飞机火爆防控及可靠性适航技术重点实验室,沈阳110136 [2]沈阳航空航天大学安全工程学院,沈阳110136

出　　处：《化工新型材料》2023年第10期130-134,共5页New Chemical Materials

基　　金：辽宁省教育厅项目(JYT2020011)。

摘　　要：采用三官能度的四种分子量的聚醚多元醇(300、500、1000和3000)与异氰酸酯(PM200)“一步法”全水发泡制备聚氨酯泡沫(PUF)。采用热重分析、Flynn-Wall Ozawa法、锥形量热仪和烟密度分析了不同分子量对PUF热稳定性和燃烧性能的影响。结果表明,随着聚醚多元醇分子量的增加,材料的活化能先增大后减小。使用1000分子量聚醚多元醇制备的PUF具有最高的活化能和最佳的热稳定性,最低的峰值放热率(469kW/m^(2))和烟密度(51.3),这一测试有助于探索阻燃泡沫的固有燃烧行为。Polyurethane foams(PUF)were synthesized with tri functional polyether polyols of four molecular weights(300,500,1000 and 3000)using the“one-step method”of all-water foaming.The effects of different molecular weights on the thermal stability and combustion performance of PUFs were investigated using thermogravimetric analysis,Flynn-Wall-Ozawa methods,cone calorimeter analysis and smoke density(Ds)analysis.The results indicated that the activation energy of PUFs first increased and then decreased with the increase of the molecular weight of the polyether polyol.The PUF prepared using polyether polyol with 1000 molecular weight possessed the highest activation energy and best thermal stability,with the lowest peak heat release rate(469kW/m^(2))and Ds(51.3),which was helpful for exploring the intrinsic combustion behavior of flame-retardant foams.

关 键 词：全水发泡 热稳定性 活化能 燃烧性能 锥形量热仪分析 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]