Accession Number : AD0467495


Title :   Pyrolysis of Composite Propellant Fuel Binders


Corporate Author : EXPLOSIVES RESEARCH AND DEVELOPMENT ESTABLISHMENT WALTHAM ABBEY (UNITED KINGDOM)


Personal Author(s) : Howard, B C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/467495.pdf


Report Date : 12 Apr 1965


Pagination or Media Count : 27


Abstract : Over the temperature range examined (350 to 475 deg C) polyether-polyurethane rubbers gasify more readily than polyisobutene which, in turn, gasifies at a faster rate than polyester-polyurethane rubbers. Prepolymers gasify at a slower rate than the corresponding polyurethane rubbers. At 350 deg C all of the polymers examined give first order reactions but increasing the temperature to 475 deg C produces deviation from first order behavior. There is evidence that at the higher temperatures free-radical breakdown is responsible for the rapid rate of gas production. Polyisobutene gives a high monomer yield at lower temperatures but at 475 deg C methane and ethylene are also formed. The polyurethane rubbers produce acetaldehyde, methane, ethylene, and carbon monoxide; the polyethers, in addition, give propylene and the polyesters carbon dioxide. Not all of the polymer pyrolysed can be accounted for by these simple gases; the other products probably consist of a mixture of higher molecular weight hydrocarbons.


Descriptors :   *PYROLYSIS , *COMPOSITE PROPELLANTS , COMPOSITE MATERIALS , THERMOCHEMISTRY , ETHERS , UNITED KINGDOM , SYNTHETIC RUBBER , POLYETHERS , SOLID ROCKET PROPELLANT BINDERS , BUTYL RUBBER , SOLID ROCKET FUELS , POLYMERS , DEGRADATION , ISOCYANATES


Subject Categories : Physical Chemistry
      Rocket Propellants


Distribution Statement : APPROVED FOR PUBLIC RELEASE