环氧树脂复合材料端面包覆多孔粒状发射药的初步研究

Preliminary Study of Multiperforated Granular End-surface-coated Propellant by Epoxy Resin Composite Materials

为了消除大口径火炮主装药粒在燃烧过程中端面的减面燃烧,改善火炮的弹丸行程压力曲线,以25/37硝基胍发射药做基药,在研究不同阻燃剂含量环氧树脂复合材料的力学性能、热膨胀性能、固化性能和相应配方包覆药开孔率的基础上,对包覆药的开孔率与包覆材料的组成和性能之间的关系进行了分析比较,最后得出结论:当混合阻燃剂(m(石英)m(二氧化钛)=12)占E44环氧树脂树脂(含43%的650聚酰胺固化剂)质量的40%,外加10%11的醇酮混合稀释剂时,在室温下固化可以得到开孔率达到99%以上的端面阻燃包覆药粒。

The end surface of the principal propellant exists regressive burning in large caliber gun.The p-l curve of projectile can be perfected as the regressive burning eliminated.Hereon,different fire retardant amounts epoxy resin composites（ERC） were studied.On the basis of tests of mechanical properties,thermal expansion properties,curing properties of these ERC and open-pore-ratio of coated 25/37 nitroguanidine propellant by ERC,the relationships between the open-pore-ratio and the properties of ERC were analyzed.Results show 99% open-pore-ratio can be achieved when the mass formula of ERC is as follow： 60% resin（E44 epoxy resin650 polyamide=43）,40% mixed fire retardant（quartz powderTiO2=12）,added 10% diluting agent（alcoholacetone=11）.