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Combustion Properties of Composite Propellants Based on Two Kinds of Polyether Binders and Different Oxidizers
Author(s) -
Gong Li,
Li Jianmin,
Li Yuping,
Yang Rongjie
Publication year - 2020
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202000041
Subject(s) - propellant , ammonium perchlorate , combustion , materials science , composite number , tetrahydrofuran , composite material , explosive material , chemical engineering , chemistry , organic chemistry , solvent , engineering
Two kinds of solid propellants based on propargyl‐terminated ethylene oxide‐tetrahydrofuran copolyether (PTPET) and ethylene oxide‐tetrahydrofuran copolyether (PET) were prepared with 1,3,5‐trinitro‐1,3,5‐triazacyclohexane (RDX), ammonium perchlorate (AP) and aluminum (Al), respectively. The order of burning rates for PET+RDX, PTPET+RDX and PET+RDX+Cu−B propellants: PTPET+RDX > PET+RDX > PET+RDX+Cu−B. Their pressure exponents are also similar when the pressure is higher than 7 MPa. The combustion residue of PET+RDX and PET+RDX+Cu−B propellants show a loose structure and there are many bright particles distributed in its flame zone. The combustion residue of PTPET+RDX propellant shows a dense structure and its flame is uniform. The burning rates of PET+AP+Cu−B propellant is between the burning rates of PET+AP and PTPET+AP propellants at the same pressure. Their flame shape is similar. The burning rates of PET+AP+Al+Cu−B propellant is also between the burning rates of PET+AP+Al and PTPET+AP+Al propellants at the same pressure. The combustion flame of PET+AP+Al propellant differs greatly in direction and shape at different time. The combustion flame of PTPET+AP+Al and PET+AP+Al+Cu−B become almost identical in shape and direction at different time. These results show that the curing catalyst Cu−B of PTPET propellant plays a catalytic role in combustion.