NEPE (nitrate ester plasticized polyether) propellant with good low-temperature mechanical property

Abstract

The invention relates to a NEPE (nitrate ester plasticized polyether) propellant with good low-temperature mechanical property. The NEPE propellant is prepared from the following components in percentage by mass: 5 to 10% of adhesive, 6 to 16% of energetic plasticizer, 0 to 3% of cold-resistant plasticizer, 15 to 40% of oxidant, 20 to 41% of energetic oxidant, 0.3 to 1.0% of curing agent, and 15 to 19% of fuel, wherein the cold-resistant plasticizer is triglyceride ethyl carbonate, and the adhesive is ethylene oxide-tetrahydrofuran copolymer; the plasticizer is a nitroglycerin and triethylene glycol dinitrate mixture, and singly uses triethylene glycol dinitrate; the oxidant is ammonium perchlorate, and the energetic oxidant is octogen or hexogen; the curing agent is hexamethylene diisocyanate; the fuel is Al (aluminum). The NEPE propellant has the characteristics that the low-temperature mechanical property is good, the energy is higher, and the like; the NEPE propellant is suitable for tactical missiles with low use environment temperature, high charge ratio and large thrust.

Description

technical field [0001] The invention belongs to the technical field of propellants, in particular to a NEPE propellant with good low-temperature mechanical properties. Background technique [0002] Solid propellants are the power source for solid rocket motors. The gaseous working medium is burned and released in the solid motor to generate thrust for the missile system. In order to ensure the normal operation of the engine, the solid propellant grain must maintain its structural integrity under all conditions of use (such as long-term storage, temperature cycling, ignition pressurization, transportation vibration, acceleration load during launch, etc.). However, when the low-temperature mechanical properties of the propellant are low, damage may occur under stress conditions such as temperature cycling, storage, transportation vibration, and ignition boost due to the low-temperature environment. Finally, the pressure of the engine after ignition increases sharply due to th...

AI Technical Summary

Problems solved by technology

[0010] At home and abroad, there are few studies on improving the low-temperature performance of NEPE propellants, and the reported technical approaches are either not suitable for NEPE propellants, or cannot fully meet the use requirements

Images