A STUDY OF THE ENCAPSULATION APPLICABLE TO LIQUID ROCKET FUEL
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1961
- Accession Number
- AD0265895
Entities
People
- Paul Y. Hsieh
Organizations
- NCR Corporation