铝-有机磷杂化纳米棒阻燃剂提高环氧树脂阻燃性和力学性能
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摘要
以苯基磷酸(BPA)和氢氧化铝(ATH)缩合反应制备得到铝-有机磷杂化纳米棒状阻燃剂(AOPH-NR),并制备环氧树脂(EP)/AOPH阻燃复合材料,通过红外光谱、XRD和透射电镜(TEM)对AOPH-NR纳米进行结构表征。采用极限氧指数(LOI)、垂直燃烧(UL-94)、热重分析(TGA)、锥形量热测试及弯曲强度研究了AOPH-NR对材料阻燃性和力学性能的影响。结果表明,添加25%AOPH-NR的环氧树脂弯曲强度可以提高到纯净环氧树脂的两倍;AOPH-NR能有效降低环氧树脂热释放速率(HRR),减少材料燃烧时的总烟释放量(TSR);与纯净的ATH相比,AOPH-NR具有更好的热稳定性,可以有效提高环氧树脂阻燃性和力学性能。
Aluminum-organophosphorous hybrid nanorods flame retardant(AOPH-NR)was prepared by reacting aluminum hydroxide(ATH)with benzylphosphinic acid(BPA),and used to prepare nanocomposites with epoxy resin. FTIR,XRD and TEM examinations showed that AOPH-NR possesses a highly hybrid nano rod structure. The flame retardancy and mechanical properties of the EP/AOPH compositesl were investigated by limiting oxygen index(LOI),vertical burning(UL-94),thermogravimetric analysis(TGA),cone calorimeter and flexure strength. The results show that the flexural strength of epoxy resin with 25% AOPH-NR can be increased twice that of pure epoxy resin. In addition,AOPH-NR can effectively reduce the thermal release rate of epoxy resin(HRR),reducing the total smoke release(TSR)when the material is burning. Compared with pure ATH,AOPH-NR has better thermal stability and can effectively improve the flame retardancy and mechanical properties of the epoxy resin.
Aluminum-organophosphorous hybrid nanorods flame retardant(AOPH-NR)was prepared by reacting aluminum hydroxide(ATH)with benzylphosphinic acid(BPA),and used to prepare nanocomposites with epoxy resin. FTIR,XRD and TEM examinations showed that AOPH-NR possesses a highly hybrid nano rod structure. The flame retardancy and mechanical properties of the EP/AOPH compositesl were investigated by limiting oxygen index(LOI),vertical burning(UL-94),thermogravimetric analysis(TGA),cone calorimeter and flexure strength. The results show that the flexural strength of epoxy resin with 25% AOPH-NR can be increased twice that of pure epoxy resin. In addition,AOPH-NR can effectively reduce the thermal release rate of epoxy resin(HRR),reducing the total smoke release(TSR)when the material is burning. Compared with pure ATH,AOPH-NR has better thermal stability and can effectively improve the flame retardancy and mechanical properties of the epoxy resin.
引文
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[2]陈平.环氧树脂及其应用.北京:化学化工出版社[M].2011.
[3]Azeez,A.A.,Rhee,K.Y.,Park,S.J.,et al.Epoxy clay nanocomposites processing,properties and applications:A review.Compos.Part B:Eng[J].2013,45(1),308-320.
[4]岳杰,李云涛,赵春霞,等.不同粒径可膨胀石墨协同聚磷酸铵对环氧树脂燃烧性能的影响[J].高分子材料科学与工程[J].2013,29(10):85-88.
[5]Lefèvre G.,Fédoroff,M Synthesis of bayerite(β-Al(OH)3)microrods by neutralization of aluminate ions at constant p H.Mater.Lett[J].2002,56(6),978-983.
[6]祖占良,孙青,李惠,等.氢氧化镁阻燃材料的制备与应用研究进展[J].中国粉体技术,2013,19(6):37-40.
[7]杨朕,周晨刚,周到,等.线型低密度聚乙烯—氢氧化镁复合阻燃材料的改性[J].石油化工新材料,2010,39(3):314-319.
[8]Mirzataheri,A.S.S.M.M.,Synthesis and characterization of the nano aluminafilled tetraglycidyl-4,40-diaminodiphenylmethane epoxy resin.Polym.Bull.[J].2017,74(7):1283-1298.
[9]郭正虹,方征平,陈超.苯基磷酸铈与十溴二苯醚在玻璃纤维增强聚对苯二甲酸乙二酯中的协同阻燃抑烟机理[J].高等学校化学学报,2017,38(2):284-293.