A composite solid propellant with low burning rate, high energy and high mechanical properties

Abstract

The invention relates to a compound solid propellant with a low burning rate, high energy and high mechanical property. The compound solid propellant is prepared from components in parts by weight asfollows: 6-7 parts of an adhesive, 17-19 parts of a plasticizer, 10-15 parts of an oxidizing agent, 42-47 parts of energy-containing explosive, 15-18 parts of metal fuel, 0.15-0.25 parts of a curing agent, 0.05 parts of a curing catalyst, 0.3 parts of a stabilizing agent and 0.2 parts of a bonding agent. The minimum burning rate under the pressure of 6.686 MPa can reach 7 mm / s, the standard specific impulse is stably larger than 255 s according to actual testing, the technical problems that the burning rate of a high-energy propellant is further reduced and the energy of the propellant is substantially reduced are solved, and the technical requirements of existing propellants for weapon models for high energy, lower burning rate and high mechanical property are met.

Description

technical field [0001] The invention relates to a nitrate plasticized polyether polyester composite solid propellant (abbreviated as NEPE). Background technique [0002] The development trend of long-range, large load, strong penetration, small and high mobility of missile weapon systems constantly requires the solid propellant used in the engine combustion chamber to have high energy, the lowest possible burning rate, and higher mechanical properties. Among them, high energy and low burning rate are a pair of sharp conflicts, because the stable performance of energy performance can only be realized when the propellant reaches a certain burning rate. When the propellant burning rate is lower than a certain lower limit value, the lower limit value is usually 8mm / s~9mm / s for high-energy NEPE propellants, and the current decelerating agent method is used to further reduce the burning rate, and the energy performance of the propellant A sharp decline. As an important component...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the molecular weight of PCL bulk polymerization exceeds 8000, the melting point exceeds 55°C

Therefore, polyPCL with a molecular weight of more than 10000 and f=2 is difficult to dissolve in nitrate esters during the preparation process with NG and BTTN at 50 °C, and cannot be used in high-energy propellants.

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