Sun Qili, Yang Xiao-Mei, Yin Guang-Zhong
School of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Faculty of Design, Innovation and Technology, University of Design, Innovation and Technology (UDIT), Av. Alfonso XIII, 97, 28016 Madrid, Spain.
Polymers (Basel). 2024 Sep 17;16(18):2626. doi: 10.3390/polym16182626.
To improve the reinforcement effect between a binder and high solid filler in a propellant formula, grafting the bonding group into the binder to form a neutral polymeric is a practically novel approach to improving the interface properties of the propellant. In this work, a glycidyl azide polyol energetic thermoplastic elastomer binder with a -CN bonding group (GAP-ETPE) was synthesized, and the mechanical and thermal decomposition mechanism of GAP-ETPE with Hexogeon (RDX) model propellants were studied. The stress-strain results indicated that the tensile strength and strain of GAP-ETPE/RDX model propellants were 6.43 MPa and 32.1%, respectively. DMA data showed that the storage modulus (E') of the GAP-ETPE/RDX model propellants could increase the glass transition temperature () values, those were shifted to higher temperature with the increase in filler RDX percentages. TG/DTG showed the four decomposition stages of the decomposition process of the GAP-ETPE/RDX model propellants, and the thermal decomposition equation was constructed. These efforts provide a novel method to improve GAP-ETPE/RDX propellants mechanical property, and the thermal decomposition behavior of GAP-ETPE/RDX propellants also provided technical support for the study of propellant combustion characteristics.
为提高推进剂配方中黏合剂与高固体填料之间的增强效果，将键合基团接枝到黏合剂中以形成中性聚合物，是一种切实可行的改善推进剂界面性能的新方法。在本研究中，合成了一种带有-CN键合基团的缩水甘油叠氮聚醚多元醇含能热塑性弹性体黏合剂（GAP-ETPE），并研究了GAP-ETPE与黑索今（RDX）模型推进剂的力学和热分解机理。应力-应变结果表明，GAP-ETPE/RDX模型推进剂的拉伸强度和应变分别为6.43 MPa和32.1%。动态热机械分析（DMA）数据表明，GAP-ETPE/RDX模型推进剂的储能模量（E'）能够提高玻璃化转变温度（）值，随着填料RDX含量的增加，这些值向更高温度偏移。热重/微商热重（TG/DTG）分析显示了GAP-ETPE/RDX模型推进剂分解过程的四个分解阶段，并构建了热分解方程。这些工作为改善GAP-ETPE/RDX推进剂的力学性能提供了一种新方法，GAP-ETPE/RDX推进剂的热分解行为也为推进剂燃烧特性的研究提供了技术支持。
