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首页> 外文期刊>Combustion Science and Technology >Tailoring Binder Melting Temperature to Study the Binder Melt Layer Flow in Ammonium Perchlorate Composite Propellants
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Tailoring Binder Melting Temperature to Study the Binder Melt Layer Flow in Ammonium Perchlorate Composite Propellants

机译：剪裁粘合剂熔化温度，研究粘合剂熔融层在高氯酸铵复合推进剂中流动

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摘要

Understanding the melt layer of composite solid propellants is crucial to theoretically model the combustion mechanism. Numerous studies on the melt layer flow have determined that the melting temperatures of the binder govern the burning rate dependence on pressure. Previous investigations discovered that using curatives and using different binders alter the binder melting temperature. The authors have developed a process to tailor the melting temperature through a functionalization process on the hydroxyl-terminated polybutadiene (HTPB) polymer. This study presents the analysis on the impacts of the melt layer dynamics of an ammonium perchlorate (AP)/HTPB-based propellant with tailorable melting temperatures. Pyrolysis measurements observed increased binder melt layer flow, resulting in lower pyrolysis rates. Propellants made with similar melting temperatures to the traditional R45M had similar burning rates but introduced more scatter due to the hardness of the propellant. Additional propellant samples containing 17?wt% aluminum (Al) and 70?wt% AP were made with a range of melting temperatures to study the impact of melting temperature on the melt layer. A rheological study on the cured propellant mixtures with tailored melting properties identified the melting temperatures for the level of HTPB functionalization. Those mixtures were burned, and the burning rates varied based on the melting temperature. The results suggested that a lower melting temperature produces a plateau propellant.
机译：理解复合固体推进剂的熔融层对理论上模拟燃烧机制至关重要。关于熔融层流动的许多研究已经确定了粘合剂的熔化温度控制燃烧速率对压力的依赖性。以前的研究发现，使用固化剂和使用不同的粘合剂改变粘合剂熔化温度。作者开发了一种通过羟基封端的聚丁二烯（HTPB）聚合物上的官能化方法定制熔融温度的方法。本研究提出了氨氯酸铵（AP）/ HTPB基推进剂与可定制熔化温度的影响的分析。热解测量观察到增加的粘合剂熔融层流动，导致较低的热解率。通过与传统R45M类似的熔化温度制成的推进剂具有类似的燃烧率，但由于推进剂的硬度引入了更多的散射。通过一系列熔化温度制备含有17·wt％铝（Al）和70〜wt％AP的额外推进剂样品，以研究熔化温度对熔体层的影响。定制熔融性能的固化推进剂混合物的流变研究确定了HTPB官能化水平的熔化温度。这些混合物被燃烧，并且燃烧速率基于熔化温度而变化。结果表明，较低的熔化温度产生高原推进剂。

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  • 来源
    《Combustion Science and Technology》 |2021年第8期|931-943|共13页
  • 作者

    Demko A. R.; Lormand B.; Doorenbos Z.;

  • 作者单位

    Naval Air Warfare Ctr Weap Div Combust Sci & Prop Branch 1 Adm Circle China Lake CA 93555 USA;

    Naval Air Warfare Ctr Weap Div Energet Mat Res & Proc Branch China Lake CA USA;

    Naval Air Warfare Ctr Weap Div Energet Mat Res & Proc Branch China Lake CA USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    HTPB; AP; melting temperature; viscosity;

    机译：HTPB;AP;熔化温度;粘度;

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