测试发帖（转帖）：2,4-DNI铅盐的合成及性能

中文摘要

为解决惰性催化剂加入到固体推进剂中引起能量降低的问题,以咪唑为原料经两步硝化、热重排和复分解反应合成了一种新型含能燃烧催化剂2,4-DNI铅盐(PDNI)。测试了其机械感度、相容性等性能,并与PNTO进行了比较。结果表明,PNTO和PDNI与NC/NG体系均具有较好的化学相容性,比PNTO具有更低的机械感度和更好的热稳定性。将其作为含能燃烧催化剂应用于固体推进剂中,考察其对燃烧性能的影响,结果表明,PDNI在螺压改性双基推进剂配方中的燃烧催化作用与2,4-二羟基苯甲酸铅相当。

Abstract

For solving the problem of energy decrease of solid propellant caused by adding inert catalyst into propellant, a novel energetic combustion catalyst, 2,4-dinitroimidazole lead salt (PDNI)was synthesized by two stepsof nitration, thermal rearrangement and ion exchange reactions using imidazole as starting material. The mechani-cal sensitivity and compatibility of PDNI were determined and compared with those of PNTO. The result shows that PDNI has fair compatibility with NC/NG system. In comparison with PNTO,PDNI has the lower mechanical sensitivity and better thermal stability. The effects of PDNI as an energetic combustion catalyst on the combustion performance of the modified double base propellant were investigated. The results show that PDNIhas catalytic effect level approaching that of Pb(Ⅱ )-β-resorcylic acid complex.