Accession Number : AD0265895

Title :   A STUDY OF THE ENCAPSULATION APPLICABLE TO LIQUID ROCKET FUEL

Corporate Author : NATIONAL CASH REGISTER CO DAYTON OHIO

Personal Author(s) : HSIEH,PAUL Y.

Report Date : JAN 1961

Pagination or Media Count : 1

Abstract : Permeability of ethylcellulose and nitrocellulose films to 13 different gases and vapors was determined. The solubility of these gases and vapors in ethylcellulose and nitrocellulose was also measured y gravimetric and volumetric methods of equilibrium sorption. From these data for permeability and solubility, diffusion constants of the gases and vapors in the polymeric films were calculated by means of the relation, P equals DS. It was found that the diffusion constant decreased linearly with an increase of molecular weight; however, the shape factor of the molecules played an important role in diffusion. The solubility constants decreased linearly with an increase of the Lennard-Jones force constants when solubility was expressed on , 34p. incl. il weight basis rather than a volume basis. It is possible to estimate permeabilities of other gases and vapors in these films from their molecular weights and Lennard-Jones force constants. (Author)

Descriptors :   *ENCAPSULATION, *ETHYL CELLULOSE, *FILMS, *GASES, *NITROCELLULOSE, *POLYMERS, *SEMIPERMEABILITY, *VAPORS, AMMONIA, ARGON, CARBON DIOXIDE, COATINGS, DIFFUSION, DIPOLE ANTENNAS, HELIUM, LIQUID ROCKET PROPELLANTS, MEMBRANES, NITROGEN, OXYGEN, PLASTIC COATINGS, ROCKET FUELS, SOLUBILITY, SULFUR COMPOUNDS, WATER VAPOR

Distribution Statement : APPROVED FOR PUBLIC RELEASE