聚三唑交联固体复合推进剂力学及燃烧性能研究

Study on the Mechanical and Burning Properties of Polytriazole Crosslinked Solid Composite Propellants

关键词:  固体复合推进剂  端炔基环氧乙烷-四氢呋喃共聚醚  点击化学

Key words:  Solid composite propellants  Propargyl-terminated ethylene oxide - tetrahydrofuran copolymer  Click chemistry

摘要:

为了解决传统固体复合推进剂端羟基-异氰酸酯固化体系对水敏感以及与ADN，B粉等新组分不相容的问题，使用端炔基化的环氧乙烷-四氢呋喃共聚醚(PTPET)-多叠氮化合物组成新的固化体系，制备了常规配方S1、含键合剂配方S2、含ADN配方S3和含B粉配方S4的复合推进剂，对其力学性能和燃烧性能进行了测试。结果表明，室温下S1~S4的拉伸强度和断裂伸长率分别为0.60MPa，15%；0.63MPa，31%；0.40MPa，24%；0.72MPa，124%。在低温 (-40 ℃)下，S1~S4的拉伸强度和断裂伸长率分别为1.69MPa，＞150%；2.10MPa，＞149%；1.18MPa，＞145%；2.10MPa，＞149%。在高温 (60 ℃)下，S1~S4的拉伸强度和断裂伸长率分别为0.47MPa，23%；0.49MPa，21%；0.32MPa，17%；0.57MPa，84%。S2~S4在4~8 MPa下的燃速压力指数分别为0.49，0.52，0.38。4MPa压力，Ar气气氛下，S1~S4的爆热分别为6669，6695，6350，7014kJ/kg。总结了燃速和爆热的关系方程式。

Abstract:

The traditional solid composite propellants with the terminal hydroxyl adhesive/isocyanate curing agent system are high water-sensitive，poorly compatible and stable with some novel solid additives such as ammonium dinitramide(ADN)and boron powders. These problems are expected to be solved by preparing the polytriazole cross-linked solid composite propellants using propargyl-terminated ethylene oxide-tetrahydrofuran copolymer(PTPET)as a adhesive and polyazide compound as an curing agent. The propellant samples were prepared containing different components: S1(common formula)，S2(containing LBA-604)，S3(containing ADN)，S4(containing boron). The mechanical and burning properties of these samples were tested. The tensile stress and the broken strain are 0.60 MPa and 15%，0.63 MPa and 31%，0.40 MPa and 24%，0.72 MPa and 124% at room temperature; 1.69 MPa and above 150%，2.10 MPa and above 149%，1.18 MPa and above 145%，2.10 MPa and above 149% at -40 °C；0.47 MPa and 23%，0.49 MPa and 21%，0.32 MPa and 17%，0.57 MPa and 84% at 60 °C. The burning rate pressure exponents are 0.49，0.52 and 0.38 for S2~S4 at 4~8 MPa. Under argon atmosphere，the explosion heat is 6669，6695，6350 and 7014kJ/kg for S1~S4 at pressure of 4 MPa. The burning rate - explosion heat formula is summed up.