介面驱动交联网络形成和复合推进剂中的机械反应的分子模拟
Chen Ling1, Xinke Zhang1, Xin Li2
1Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
Polymers
|July 12, 2025
概括
这项研究使用分子模拟来了解复合推进剂成分如何相互作用,揭示了两步反应机制. 优化这些相互作用可显著提高推进剂的机械性能,以实现更安全的航空航天和军事应用.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 复合固体推进剂是航空航天和军事系统的关键能量材料.
- 确保它们的安全性和稳定性需要提高机械性能.
- 了解推进剂组件之间的界面相互作用是网络形成的关键.
研究的目的:
- 研究复合推进剂中的分子级界面相互作用.
- 阐明这些相互作用对交联网络形成的影响.
- 为优化推进剂配方提供一个计算框架.
主要方法:
- 集成的计算框架,结合粗粒度模拟和反应力场.
- 分子动力学模拟用于研究界面反应和机械性能.
- 对影响业绩的关键参数进行系统调查.
主要成果:
- 在AP接口上阐明了两步反应机制:结合剂的自我聚合,随后是固化剂的参与.
- 确定机械性能增强的最佳参数 (~20%的改进).
- 在接口附近进行缺陷形成分析的演示.
结论:
- 该研究提供了分子层面的洞察力,了解复合推进剂中的结构性质关系.
- 开发的计算框架使得推进剂配方的指导优化成为可能.
- 通过合理的参数选择,可以实现机械性能量身定制的增强.
相关概念视频
01:08Molecular Weight of Step-Growth Polymers
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
01:28Classification and Mechanical Properties of Synthetic Polymers
Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...