聚焦磷酸哌嗪-埃洛石纳米管-三聚氰胺氰尿酸盐协效阻燃环氧树脂  

Piperazine polypyrophosphat-halloysite nanotubes-melamine cyanurate synergistic flame retardant epoxy resin

作　　者：马静[1] 刘美哲 朱明轩 朱璟[1] 张照邦 汪宝和[1] MA Jing;LIU Meizhe;ZHU Mingxuan;ZHU Jing;ZHANG Zhaobang;WANG Baohe(Key Laboratory of Green Synthesis Conversion(Ministry of Education),R&D Center for Petrochemical Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学石油化工技术开发中心绿色合成与转化教育部重点实验室,天津300072

出　　处：《材料工程》2023年第6期177-185,共9页Journal of Materials Engineering

摘　　要：通过改进现有制备方法,合成了一种高热稳定性的聚焦磷酸哌嗪(PAPP),并将其与埃洛石纳米管(HNTs)、三聚氰胺氰尿酸盐(MCA)复配为P-N-Si系膨胀型阻燃剂,协效阻燃环氧树脂(EP)。通过极限氧指数、垂直燃烧、锥形量热仪、SEM等测试方法,考察了膨胀型阻燃剂对EP阻燃性能的影响。结果表明,复配阻燃剂的引入形成了致密、连续的膨胀型炭层,从凝聚相和气相分别提高了环氧树脂的阻燃效率,有效降低了环氧树脂的放热速率和放热量,以及有毒气体的释放,当PAPP/HNTs/MCA配比为7∶1∶2时,极限氧指数达34.3%,UL-94达V-0级,相比于纯EP,残炭量显著增加,热释放速率(HRR)峰值下降了60.56%,总热释放量(THR)及有毒气体的排出大幅度减少。热重分析结果表明,阻燃改性后EP的初始分解温度降幅ΔT为4.4%,改性后的EP仍具有较高的热稳定性。By improving the existing preparation methods,a piperazine polypyrophosphat(PAPP)with high thermal stability was synthesized.It was compounded with halloysite nanotube(HNTs)and melamine cyanurate(MCA)to form P-N-Si intumescent flame retardant,and was used in synergistic flame retardant epoxy resin(EP).The effect of intumescent flame retardant on the flame retardancy of EP was investigated by means of limiting oxygen index,vertical combustion,cone calorimeter and SEM etc.The results show that the introduction of the compound flame retardant forms a dense and continuous intumescent carbon layer,which improves the flame retardant efficiency of the epoxy resin in the condensed phase and the gas phase.It reduces the heat release and heat release rate of epoxy resin and the toxic gases release effectively.When the PAPP/HNTs/MCA ratio is 7∶1∶2,the limiting oxygen index of flame retardant resin reaches 34.3%,the UL-94 vertical combustion test reaches V-0 level.Compared with pure EP,the amount of residual carbon is increased significantly,the peak heat release rate(HRR)is decreased by 60.56%,and the total heat release(THR)and toxic gas emissions are reduced significantly for modified EP.In addition,the thermogravimetric analysis results suggest that the initial decomposition temperature of flame retardant modified EP is decreased by 4.4%(ΔT),and the modified EP still has high thermal stability.

关 键 词：环氧树脂 膨胀型阻燃剂 阻燃性能 热稳定性 聚焦磷酸哌嗪 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]