摘要
为降低球形二硝酰胺铵(ADN)的吸湿性,采用聚氨酯黏合剂对其进行包覆。用扫描电镜(SEM)和称重法分析了包覆后ADN的表面形貌和吸湿性,结果表明,聚氨酯黏合剂在ADN表面形成絮状的包覆膜,使包覆后ADN的吸湿率明显小于包覆前ADN,在相对湿度60%以下,包覆后ADN在空气中暴露30天时吸湿率仅0.136%,吸湿率不随时间增加。热分析和机械感度测试表明,聚氨酯黏合剂对ADN的熔点、分解峰温、分解热焓的影响较小,但使ADN的机械感度增加,包覆前后ADN的摩擦感度分别为30%和60%,撞击感度(H50)分别为30.5cm和27.8cm。
The prilled ammonium dinitramide（ADN） was coated by polyurethane binders（PU）, for reducing it＇s hygroseopieity. The surface appearance and hygroscopieity of ADN after coating were analyzed by SEM and weighing method. Results show that a kind of floecule of PU is formed on the surface of ADN, which makes the hygroseopieity of ADN after coating less than that before coating evidently. When coated ADN is exposed in the atmosphere for 30 days with the RH less than 60% , the hygroseopieity of coated ADN is only 0. 136% and does not increase with the increasing of exposure time. The thermoanalysis and mechanical sensitivity test show that the PU has little effect on the melting point,decomposition peak and enthalpy of coated ADN,but makes the meehanieal sensitivity of ADN increase. Friction and impact sensitivity of ADN before and after coated are 30% ,60% ,30.5 cm,and 27.8 cm, respectively.
出处
《含能材料》
EI
CAS
CSCD
2008年第6期712-715,共4页
Chinese Journal of Energetic Materials
关键词
分析化学
包覆ADN
聚氨酯黏合剂
吸湿性
机械感度
analytical chemistry
coated ammonium dinitramide
polyurethane binders
hygroseopieity
mechanical sensitivity
