Accession Number : ADA185865

Title :   Thermoplastic Elastomers as LOVA Binders.

Descriptive Note : Quarterly rept. Apr 87-Jul 87,

Corporate Author : MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING

Personal Author(s) : Chien, James C ; Farris, Richard J ; Lillya, C P ; Winter, H H

PDF Url : ADA185865

Report Date : Jan 1987

Pagination or Media Count : 35

Abstract : The energy balance type of approach to modelling the debonding behavior of highly filled composites such as propellants described in earlier reports is being more fully developed. This approach equates the change in strain energy of a sample during debonding to the work necessary to create new surfaces on the debonded particles. A high pressure gas dilatometer has been constructed and was recently tested for the first time. This instrument concurrently measures stress and volume changes which occur in a sample during uniaxial extension. Superimposed hydrostatic pressures of up to 1000 psi may be used. It appears to operate properly, and is sensitive to small changes in pressure and load. Atmospheric testing of samples is scheduled to being immediately. The bulk synthesis of polyurethane from tolylene 2,4-diisocyanate and diols or triols of poly (propylene oxide) to form void-free samples was accomplished after some trouble.

Descriptors :   *BINDERS, *ELASTOMERS, *THERMOPLASTIC RESINS, *SYNTHESIS(CHEMISTRY), *GUN PROPELLANTS, COMPOSITE MATERIALS, ENERGY, HYDROSTATIC PRESSURE, OXIDES, PARTICLES, POLYURETHANE RESINS, PROPELLANTS, PROPENES, SURFACES, SYNTHESIS, BENZOATES, ALKENES, LIQUID CRYSTALS, TRANSITION TEMPERATURE, POLYCYCLIC COMPOUNDS

Subject Categories : Ammunition and Explosives
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE