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系统研究了黏合剂固化网络参数对推进剂低温力学性能的影响。通过调节黏合剂预聚物分子结构,选择合适的固化剂、交联剂、扩链剂、增塑剂等固化网络结构因子,显著改善了PBT(3,3–双(叠氮甲基)氧杂环丁烷与四氢呋喃共聚醚)叠氮聚醚推进剂低温力学性能;–55℃时推进剂最大抗拉强度大于2.00 MPa,最大伸长率大于100.0%,T_g低于–60.00℃。
The influence of adhesive curing network parameters on the low temperature mechanical properties of propellants was studied systematically. By adjusting the molecular structure of the binder prepolymer and selecting the appropriate curing agent, crosslinking agent, chain extender and plasticizer to cure the network structure factors, the PBT (3,3-bis (azidomethyl) oxy) Heterocyclic butane and tetrahydrofuran copolyether) azide polyether propellants at low temperature mechanical properties; -55 ℃ when the maximum tensile strength of the propellant is greater than 2.00 MPa, the maximum elongation greater than 100.0%, T_g lower than -60.00 ℃.