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以小分子交联剂作对比,重点研究了含能大分子多元醇交联剂PBT(3,3–双(叠氮甲基)氧杂环丁烷与四氢呋喃(BAMO–THF)共聚醚)三元醇(TBT)对PBT高能固体推进剂力学性能的影响。结果表明:1采用小分子交联剂,PBT推进剂具有较高的拉伸强度与模量;同时,小分子交联剂是一种键合剂,可有效阻止推进剂在断裂拉伸时基体与填料之间的“脱湿”。2采用含能大分子交联剂,PBT推进剂具有良好的最大伸长率,但断裂拉伸时推进剂的“脱湿”现象十分严重;随含能交联剂含量的变化,PBT推进剂热稳定性基本不变。
A comparison of small molecule cross-linking agents was made. The effects of PBT (3,3-bis (azidomethyl) oxetane and tetrahydrofuran (BAMO-THF) Effect of Alcohol (TBT) on Mechanical Properties of PBT High Energy Solid Propellant. The results show that: 1 using small molecule cross-linking agent, PBT propellant has high tensile strength and modulus; the same time, small molecule cross-linking agent is a binding agent that can effectively prevent the propellant in the tensile elongation of the matrix and Stuffing between the “de-wetting”. PBT propellant has good maximum elongation, but the phenomenon of “dewetting” of the propellant is very serious at the time of tensile fracture. With the change of the content of crosslinkable energy, PBT Propellant thermal stability is basically unchanged.