TATB、TCTNB和TCDNB的爆轰性能

用电探针和锰铜压力计分别测定了Ф20mmTATB、TCTNB/Wax(97%/3%)以及TCDNB/Wax(97%/3%)3种药柱的爆速和爆压,同时用VLWR爆轰程序计算其爆轰参数和C-J产物的平衡组成。实测结果表明,TATB爆速为7.452mm·μs-1,爆压为24.40GPa;TCTNB97%和Wax3%配方的爆速为6.890mm·μs-1,爆压为20.28GPa;TCDNB97%和Wax3%配方的爆速为5.973mm·μs-1,爆压为15.30GPa。理论计算值和实验值比较接近,获得了较好的结果。

Solubility measurement,correlation and thermodynamic properties of 2,3,4-trichloro-1,5-dinitrobenzene in fifteen mono-solvents at temperatures from 278.15 to 323.15 K

The solubility of 2,3,4-trichloro-1,5-dinitrobenzene(TCDNB) was measured by a laser dynamic method over the temperature range from 278.15 K to 323.15 K under 0.1 MPa in fifteen mono-solvents(methanol,ethanol,isopropanol,n-butanol,toluene,dichloromethane,chloroform,tetrachloromethane,1,2-dichloroethane,acetone,ethyl acetate,acetonitrile,N-methylpyrrolidone(NMP),N,Ndimethylformamide dimethyl sulfoxide(DMF),dimethyl sulfoxide(DMSO).The solubility of TCDNB could be increased with increasing temperature in fifteen mono-solvents.TCDNB solubility is in the following order at 298.15 K:NMP>DMF>DMSO>toluene>acetone>ethyl acetate>dichloromethane>1,2-dich loroethane>chloroform>acetonitrile>tetrachloromethane>methanol>ethanol>n-butanol>isopropanol.The KAT-LSER model was used to investigate the solvent effect,which revealed that the hydrogen bond acidity of solvents has a greater effect on TCDNB solubility.The van't Hoff model,the modified Apelblat model,theλh model,and the non-random two liquid(NRTL)model were used to correlate the solubility of TCDNB.The calculated solubility data agreed well with the experimental data,and the modified Apelblat model fit best.Furthermore,the van't Hoff and Gibbs equations were also used to calculate the dissolution thermodynamic properties of TCDNB in various solvents.TCDNB dissolution could be an enthalpy-driven,non-spontaneous,and endothermic process in fifteen mono-solvents.The determination and fitting solubility of TCDNB,as well as the calculation of its thermodynamic properties,would be critical in the purification and crystallization of its preparation process research.

1,3⁃二氯⁃2,4,6⁃三硝基苯纯度的高效液相色谱分析方法

为准确测定1,3⁃二氯⁃2,4,6⁃三硝基苯(DCTNB)产品的纯度,建立了DCTNB及其合成过程中产生的杂质(1,5⁃二氯⁃2,4⁃二硝基苯(DCDNB)、2,3,4⁃三氯⁃1,5⁃二硝基苯(TCDNB))的高效液相色谱分析方法,研究了流动相体系及比例、流速及进样量等色谱条件对DCTNB高效液相色谱分离效果的影响,定量分析采用外标法进行。结果表明,最优的色谱条件为:Hypersil ODS2色谱柱(250 mm×4.6 mm,5μm),紫外检测波长240 nm,流动相为V_(ACN)/V_(Water)=55/45,流速1.2 mL·min^(-1),柱温25℃,进样量10μL。在上述色谱条件下,DCDNB,DCTNB和TCDNB的保留时间分别为9.20,10.50,14.17 min,各紫外吸收峰的分离度均大于3.70,分离效果良好。DCDNB,DCTNB和TCDNB分别在5~250,5~500,5~250 mg·L^(-1)浓度范围内线性关系良好,线性相关系数R^(2)>0.999,检出限分别为0.47,0.68,0.85 mg·L^(-1),定量限分别为1.58,2.28,2.82 mg·L^(-1),相对标准偏差为1.01%~1.27%,加标回收率为98.82%~102.13%。