在挤出流量过程中,压力对高填充固体推进剂的风学行为的影响
Jun Zhang1,2, Wei Zheng2, Zhifeng Yuan2
1College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Chaoyang District, Beijing 100029, China.
Polymers
|August 14, 2025
概括
压力在加工过程中显著影响固体推进剂 (SP) 粘度. 了解这种压力依赖对于优化制造和确保持续推进剂性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 聚合物科学 聚合物科学
背景情况:
- 固体推进剂 (SPs) 含有高度的微/纳米粒子,这对理解它们的质行为提出了挑战.
- 在加工条件下 (80-95°C),SPs的剪切-挤出行为,特别是它们在加工条件下的粘度,尚不清楚.
- 目前对高填充聚合物的研究还没有完全捕捉到SP的独特形学.
研究的目的:
- 为了研究固体推进剂 (SP) 融化粘度在稳定状态剪流过程中的压力依赖.
- 在实际处理温度范围内量化压力对SP风湿学的影响.
- 确定影响SP粘度压力灵敏度的因素.
主要方法:
- 使用双孔毛细管风力计进行稳定状态剪切测量.
- 采用不同直径和长度的毛细血管模具来分析粘度.
- 在控制温度和剪切速率条件下,在3-30MPa的压力范围内测量粘度.
主要成果:
- 固体推进剂的粘度强烈依赖融化压力,与压力独立模型有显著的偏差.
- 氧气颗粒和聚合物矩阵之间的接口缺陷有助于显著的融压力.
- 粘度的压力灵敏度 (β) 受到溶剂和固体颗粒含量的强烈影响.
- 观察到的差异与粒子-粒子和粒子-聚合物网络的可压缩性有关.
结论:
- 压力效应对于准确地描述固体推进剂的质性质至关重要且不可忽视.
- 在压力下的SP内部内部网络的可压缩性显著改变了流动行为.
- 考虑压力依赖对于优化SP制造流程和确保可靠性能至关重要.
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