HTPB基浇注PBX炸药固化反应动力学研究

Study on Curing Kinetics of PBX Explosives HTPB System

为研究端羟基聚丁二烯(hydroxyl-terminated polybutadiene,HTPB)基浇注PBX炸药的固化反应特性确定其固化工艺参数,采用非等温DSC法研究HTPB基浇注PBX炸药粘接剂体系固化反应动力学。分别测试升温速率为5、10、15、20 K/min时的DSC数据,得出固化反应动力学方程,计算不同温度下的反应速率常数,绘制固化速率(dα/dt)~固化度(α)关系曲线,并给出常用HTPB基浇注固化炸药的固化温度范围。结果表明:相同固化度条件下,升温速率越大,固化反应速率越大,当固化度达到0.5时,固化反应速率达到最大值,此后逐渐降低,直至为零。

In order to study on curing reaction kinetics of hydroxyl-terminated polybutadiene(HTPB)casting PBX explosives and ascertain curing technical parameter,adopt non-isothermal DSC method to research HTPB casting PBX explosive adhesives system curing reaction kinetics.Separately test DSC data when 5,10,15 and 20 K/min,and obtain the curing kinetics equation,calculate the reaction velocity constant with different temperature,and protracted the relation curve of reaction rate(da/dt)-curing degree(α).Acquire the curing temperature range of HTPB system casting curing explosive.The results show that under the condition of the same curing degree,the higher heating rate,the higher the curing reaction rate,when curing degree to 0.5,the curing reaction rate achieves to maximum.After that,it gradually decreased to zero.