PBT基钝感固体推进剂的安全特性及影响因素研究
发布时间：2019-01-03 08:04
【摘要】：为了研究新型高能钝感推进剂的安全特性,本文研究了 PBT钝感固体推进剂典型配方的热安全性,并按照美军标2015D的要求,对两种配方(P01和P02)的低易损特性展开了研究。采用差示扫描量热仪(DSC)和绝热加速量热仪(ARC)对PBT基钝感固体推进剂典型配方的热分解特性进行了研究。DSC的测试结果表明,在受热分解过程中,PBT钝感推进剂组分中的增塑剂BU首先会热分解,利用Kissinger法计算出增塑剂BU的活化能为137.8kJ·mol-1,钝感固体推进剂第一步热分解的活化能为101.7 kJ·mo-1,二者基本一致。温度范围为50～450℃的ARC试验表明,推进剂样品在分解放热过程中有三个放热阶段。第一段放热过程为BU的分解,分解温度为121.7℃,反应系统最高温度为139.3℃;温度范围为50～160℃的ARC试验表明,BU在120.7℃左右发生分解,但是由于BU含量低,并未直接引发其他组分的后续热分解反应。利用慢速烤燃试验和快速烤燃试验研究了样品P01和P02对热刺激的响应特性。在慢速烤燃试验中,P01烤燃弹在温度为133℃时发生响应,响应等级为爆轰。P02烤燃弹在温度为154.6℃时发生响应,响应等级为燃烧。裸药状态下,P01最先分解的组分为增塑剂BU,且BU的分解并不能引发推进剂整体的反应。在有壳体约束时,推进剂慢烤试验的响应程度会加剧,通过壳体在泄压方面的设计,有利于降低慢烤试验的响应等级。在快速烤燃试验中,P01与P02的响应等级皆为燃烧。慢速烤燃会产生比快速烤燃更严重破坏效应。分别采用子弹冲击试验、破片冲击试验、聚能射流冲击试验和殉爆试验研究了 P01和对机械刺激和混合刺激的响应特性。在子弹冲击试验、破片冲击试验和殉爆试验中,P01和P02的响应程度为皆为燃烧,在聚能射流试验中,样品P01的响应等级为爆轰,而P02的响应等级为燃烧。由此可见,HMX对PBT基钝感固体推进剂的安全性和低易损特性具有显著的影响。
[Abstract]:In order to study the safety characteristics of new high-energy insensitive propellant, the thermal safety of typical formulation of PBT passivation solid propellant is studied in this paper. According to the requirements of US military standard 2015D, the low vulnerability characteristics of two formulations (P01 and P02) are studied. Differential scanning calorimeter (DSC) and adiabatic accelerated calorimeter (ARC) were used to study the thermal decomposition characteristics of typical formulations of PBT based insensitive solid propellants. The results of DSC test showed that, in the process of thermal decomposition, The plasticizer BU in the component of PBT blunt propellant first decomposes. The activation energy of the plasticizer BU is calculated by Kissinger method. The activation energy of the first step thermal decomposition of 137.8kJ mol-1, obtuse solid propellant is 101.7 kJ mo-1,. The two are basically the same. The ARC test at the temperature range of 50 ~ 450 鈩，
本文编号：2399094
[Abstract]:In order to study the safety characteristics of new high-energy insensitive propellant, the thermal safety of typical formulation of PBT passivation solid propellant is studied in this paper. According to the requirements of US military standard 2015D, the low vulnerability characteristics of two formulations (P01 and P02) are studied. Differential scanning calorimeter (DSC) and adiabatic accelerated calorimeter (ARC) were used to study the thermal decomposition characteristics of typical formulations of PBT based insensitive solid propellants. The results of DSC test showed that, in the process of thermal decomposition, The plasticizer BU in the component of PBT blunt propellant first decomposes. The activation energy of the plasticizer BU is calculated by Kissinger method. The activation energy of the first step thermal decomposition of 137.8kJ mol-1, obtuse solid propellant is 101.7 kJ mo-1,. The two are basically the same. The ARC test at the temperature range of 50 ~ 450 鈩，
本文编号：2399094
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