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Study on Thermal Decomposition of Composite Propellants containing PCP polymer or PCP‐HTPB copolymer as a binder
Author(s) -
Hung ChenChia,
Hwu WenHwa,
Cheng ChinSheng,
Shyy IouNing,
Yang KuoKai
Publication year - 1995
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.19950200110
Subject(s) - propellant , ammonium perchlorate , thermogravimetric analysis , thermal decomposition , thermal stability , materials science , copolymer , plasticizer , polymer chemistry , prepolymer , decomposition , polymer , chemical engineering , composite number , composite material , chemistry , polyurethane , organic chemistry , engineering
A modified manometric vacuum stability test (MVST) apparatus as well as a differential thermal analyzer (DTA) and a thermogravimetric analyzer (TGA) were used to study thermal decomposition of a series of propellants. The solid propellants contained polycaprolactone (PCP) prepolymer or PCP‐HTPB copolymer as binder, ammonium perchlorate (AP) and a nitramine (RDX or HMX) as oxidants, aluminum as fuel, and bis(2,2‐dinitropropyl)acetal/formal (BDNPA/F) as plasticizer. The mixtures were cured with an isocyanate (Desmodur N‐100). It is found from MVST examinations that propellants containing PCP polymer are more stable than ones containing PCP‐HTPB copolymer. The PCP propellants were still stable after 40 hours heating at 135°C. The thermal decomposition reactions of prepared propellants during dynamic heating were indicated by two major stages of weight loss in the TGA traces.