DNTF/RDX-CMDB推进剂动态力学性能

摘要

采用动态力学分析仪(DMA)研究了3,4-二硝基呋咱基氧化呋咱(DNTF)与黑索今(RDX)不同配比对DNTF/RDX-CMDB(DFR)系列推进剂动态力学性能的影响,获得了DFR系列推进剂的动态力学特征量.结果表明:DNTF与RDX不同配比对DFR系列推进剂高低温动态力学性能具有较大影响;DFR系列推进剂的动态力学过程除高温段的主转变(α转变)外,低温段有2个次级转变(β转变,记为β1和β2),且认为β1转变峰是DNTF的作用结果,RDX的加入不影响DNTF与硝化甘油(NG)、硝化棉(NC)侧基的相互作用;含有DNTF的样品整个次级转变损耗峰强度比不含DNTF的样品(即RDX-CMDB)大,低温下抵抗外力的能力增加,塑性或韧性提高.%The influence of ratio of 3, 4-bisnitrofurazanfuroxan(DNTF) to RDX on dynamic mechanical properties for modified double-based propellants( DNTF/RDX-CMDB, DFR) was studied by dynamic mechanical analyzer(DMA). The characteristic values of dynamic mechanical properties at multi-frequency for DFR series propellants were obtained. Results show that the ratio of DNTF to RDX content can obviously affect the dynamic mechanical properties of DFR propellants. Two β-relaxations ( signed β1 andβ2 respectively), besides α-relaxation, appear on DMA curves of DFR propellants,and one of them (β1-relaxation ) is due to the effect of DNTF,that's to say,the plasticization of DNTF to NC molecular can not be affected by adding RDX. The whole β-relaxations peak values(Σtanδ) for CMDB, both the DNTF and RDX added, is bigger than that only RDX added, hence, the plastic or toughness has been improved while the ability to resist external forces increased at low temperature. The DFR propellant that mass ratio of DNTF to RDX is 10: 40 has optimal plastic or toughness at low temperature.