Accession Number : ADB089810


Title :   Modification of Propellant Binder Network for Improvement of Mechanical Properties


Descriptive Note : Final rept. Nov 1982-Nov 1984


Corporate Author : CALIFORNIA STATE UNIV SACRAMENTO DEPT OF CHEMISTRY


Personal Author(s) : Youn-Kim, C S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/b089810.pdf


Report Date : Dec 1984


Pagination or Media Count : 67


Abstract : The blending of long straight chain hydroxy-terminated prepolymers with branched shorter chain hydroxy-terminated prepolymers yields cured rubbers, whether containing solid fillers or not, that have large improvements in strain capability compared to short chain prepolymer rubbers. Also, the stress capability of the cured rubbers is improved compared to the long chain prepolymer rubbers. Polyethylene glycol 8000 (PEG 8000) was successfully blended with glycidyl azide polymer (GAP) and polydinitropropyl acrylate. Large equivalent weight lithium initiated, hydroxy-terminated polybutadiene improved the strain capability of R-45M cured rubbers. Pentanetriisocyanate greatly improved the tensile stress and strain for PEG 8000/polydinitropropyl acrylate binder, but did not improve the PEG 8000/GAP binder. These polymer blending and triisocyanate cross-linear techniques are applicable to curable solid propellant formulations.


Descriptors :   *RUBBER , *BINDERS , *SOLID PROPELLANTS , STRESSES , BLENDING , STRAIN(MECHANICS) , ACRYLATES , ETHYLENE GLYCOL , FILLERS , ISOCYANATES , POLYBUTADIENE , CURING , POLYMERS , TENSILE STRESS


Subject Categories : Elastomers and Rubber
      Ammunition and Explosives
      Solid Rocket Propellants


Distribution Statement : APPROVED FOR PUBLIC RELEASE