Accession Number:

AD0831812

Title:

MICROSCOPIC AND MICROCHEMICAL STUDY OF AGED PROPELLANT GRAINS.

Descriptive Note:

Quarterly rept. no. 7, 1 Feb-30 Apr 68,

Corporate Author:

AEROJET-GENERAL CORP SACRAMENTO CA RESEARCH AND TECHNOLOGY DEPT

Personal Author(s):

• Di Milo, Anthony J.
• Moe, Henry

Report Date:

1968-05-01

Pagination or Media Count:

10.0

Abstract:

Aging sites from a Polaris Cycling Unit were subjected to alkaline hydrolytic degradation and analysis of the reaction product revealed some hydroxyl prepolymer, confirming that crosslinked polyurethane polymer is an important organic component of aging sites. Procedures which have been developed for the chemical analysis of a polyurethane propellant were applied to a PBAN-epoxide propellant which had been stored at ambient conditions for 4 years. This propellant sample contained low molecular weight binder fragments. Evaporative loss of this low molecular weight material could be a cause for altering of mechanical properties upon long storage. Author

Descriptors:

• *COMPOSITE PROPELLANTS
• PROPELLANT GRAINS
• DEGRADATION
• MICROSTRUCTURE
• MICROANALYSIS
• HYDROLYSIS
• ISOCYANATES
• CROSSLINKING(CHEMISTRY)
• SOLID ROCKET PROPELLANT BINDERS
• BUTADIENES
• ACRYLONITRILE POLYMERS
• ACRYLIC RESINS
• EPOXY RESINS
• ALUMINUM
• POWDER METALS
• SURFACE TO SURFACE MISSILES

Subject Categories:

• Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE