EHTPB/HMDI粘合体系催化剂的选择与固化反应动力学  

Selection of Catalysts and Curing Kinetics of EHTPB/HMDI Binder System

作　　者：吴凯 刘玉存 贾康辉 胡菲 WU Kai;LIU Yu-cun;JIA Kang-hui;HU Fei(Centre for Public Safety on Explosive Substance,Shanxi Police College,Taiyuan,030401;School of Environmental and Safety Engineering,North University of China,Taiyuan,030051)

机构地区：[1]山西警察学院爆炸物品公共安全研究中心,山西太原030401 [2]中北大学环境与安全工程学院,山西太原030051

出　　处：《火工品》2021年第2期45-48,共4页Initiators & Pyrotechnics

基　　金：2019年山西警察学院重点研究项目(2019yzd005);西安近代化学研究所开放合作创新项目(20190387)。

摘　　要：通过粘度测试考察了环氧化端羟基聚丁二烯(EHTPB)/4,4'-二环己基甲烷二异氰酸酯(HMDI)粘合体系分别在4种催化剂作用下的固化反应速率,运用非等温DSC法研究了EHTPB/HMDI/T9体系的固化反应动力学,利用外推法预测了升温速率为0时的特征固化温度。结果表明:不同催化剂使粘合体系固化速率差异显著,最佳催化剂为辛酸亚锡(T9)。由Kissinger、Flynn-Wall-Ozawa及Doyle法计算得到EHTPB/HMDI/T9体系固化反应活化能分别为52.80 kJ/mol、56.99 kJ/mol及59.93 kJ/mol,由Crane法得到反应级数n=0.944,并进一步求得热力学参数ΔH=54.74 kJ/mol,ΔG=132.60 kJ/mol。该体系固化反应峰始温度171.35℃,峰顶温度181.25℃,峰止温度199.70℃,为最佳固化条件的确定提供了一定的技术参考。The curing reaction rate of EHTPB/HDMI binder system was investigated by viscosity test with FeAA,T12,T9 and TPB as catalyst respectively.The curing kinetics of EHTPB/HDMI/T9 system was studied by non-isothermal DSC.The characteristic curing temperature of EHTPB/HDMI/T9 system was predicted by extrapolation method with a heating rate of 0℃/min.The results show that the curing rate of the binder system is significantly different with different catalysts,and the best catalytic effect is T9.The activation energies of curing reaction of EHTPB/HMDI/T9 system calculated by Kissinger,Flynn-Wall-Ozawa and Doyle methods are respectively 52.80 kJ/mol,56.99 kJ/mol and 59.93 kJ/mol.The reaction order obtained by Crane method is 0.944,the thermodynamic parameterΔH is 54.74 kJ/mol andΔG is 132.60 kJ/mol.The initial temperature of the curing reaction is at 171.35℃,the peak temperature is at 181.25℃,and the stopping temperature is at 199.70℃,which provides a certain technical reference for the optimal curing conditions.

关 键 词：EHTPB HMDI 催化剂 粘度 固化反应动力学 

分 类 号：TQ564[化学工程—炸药化工]