【摘要】 采用Washburn薄层毛细渗透技术测定了符合军标的六个不同级别RDX的表面能及其分量。选用非极性的二碘甲烷和1-溴萘作为测定不同级别RDX表面能色散分量的探针液体,极性的乙二醇和甲酰胺作为测定不同级别RDX表面能极性分量和酸、碱分量的探针液体。研究发现,随着粒径的增大,RDX的总表面能略微增大。制备固含量为15%的RDX/HTPB/IPDI推进剂胶片,研究了RDX的粒径和表面能对HTPB推进剂力学性能的影响。结果表明,含有相同固含量的不同级别RDX的HTPB推进剂胶片的最大应力与单个RDX粒子的界面粘附能呈指数衰减函数,即y=0.5242+0.6973exp(-1.161Wadh0)。更多还原

【Abstract】 The surface free energy and its dispersive,polar,electron acceptor and electron donor components of RDX were determined by the Washburn equation with thin-layer wicking technique.The diiodomethane and 1-bromonaphthalene,which are neutral probe liquids,were used to determine the dispersive component of RDX.And the ethylene glycol and formamide,which are polar probe liquids,were used to determine the polar components of RDX.The results show that the surface free energy and its dispersive,polar,electron acceptor components increase with the increasing of particle size.And the electron donor component takes the opposite trend.Films of RDX/HTPB/IPDI with 15% mass content of RDX with different particle size were prepared.The effect of particle size and surface free energy of RDX on the mechanical properties of HTPB propellant were studied.The results show that the maximum stress well-regulated varies with the interface adhesion energy between HTPB/IPDI binder system and every RDX particle,which is y=0.5242+0.6973exp(-1.616w0adh).The maximum stress of RDX/HTPB/IPDI system decrease with the increasing of the interface free energy of every RDX particle.更多还原