Abstract:Applying polymer theory, exploring study on theoretical estimatecalculating tensile intensity of dissolutionaddingplasticity propellant is put up from the side of chemical bond and intermolecular force. Selecting singlebase(SB),doublebase(DB) and TEGDN propellant,theoritalcalculation method of tensile intensity of dissolutionaddingplasticity propellant was studied deeply. Tensile intensities of propellant were tested in the meantime,and compared with theoretical estimatecalculation. It shows that theorital tensile intensity of SB,DB and TEGDN were calculated to be 3.8×107 N·m-2,11.2×106 N·m-2 and 10.1×106 N·m-2,respectively. Their testing values were 3.1×107 N·m-2,10.6×106 N·m-2 and 8.9×106 N·m-2,respectively. It can be concluded that tensile intensity of propellant is mainly provided by intermolecular Van der Waals force. Tensile intensity of dissolutionaddingplasticity propellant can be calculated theoretically by polymer theory.