Diffusion of radioactively tagged penetrants through rubbery polymers. I. Penetrants with very low solubility. [/sup 14/C]
Abstract
The diffusion of radioactively tagged n-hexadecane, 1,7-heptanediol, and ethylene glycol has been studied in one polar and six nonpolar rubbery polymers. The penetrant-polymer pairs included some in which the two components were miscible in all proportions and some in which they were nearly incompatible (solubility of penetrant in polymer of the order of 1 percent). The theory for the thin smear method for measuring the diffusion coefficient was evaluated for incompatible pairs with two cases: case 2, when the rate-limiting step is diffusion through the polymer; and case 3, when the rate-limiting step is entry into the polymer across the penetrant-polymer interface. They are easily distinguished experimentally from each other and from case 1, which refers to completely miscible pairs. The diffusion coefficients, when compared in four hydrocarbon rubbers, of n-hexadecane and 1,7-heptanediol were similar in magnitude even though in each rubber the hexadecane was soluble in all proportions and the diol only very slightly. The diffusion coefficient of ethylene glycol, despite its extreme thermodynamic incompatibility, appeared to be somewhat larger than those of the other penetrants.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Wisconsin, Madison
- OSTI Identifier:
- 7311396
- Resource Type:
- Journal Article
- Journal Name:
- J. Appl. Polym. Sci.; (United States)
- Additional Journal Information:
- Journal Volume: 21:3
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; GLYCOLS; DIFFUSION; HEXADECANE; RUBBERS; PERMEABILITY; CARBON 14 COMPOUNDS; LABELLED COMPOUNDS; MEASURING METHODS; MEDIUM TEMPERATURE; SOLUBILITY; ALCOHOLS; ALKANES; ELASTOMERS; HYDROCARBONS; HYDROXY COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYMERS; 360404* - Materials- Polymers & Plastics- Physical Properties- (-1987); 400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
Citation Formats
Rhee, C K, and Ferry, J D. Diffusion of radioactively tagged penetrants through rubbery polymers. I. Penetrants with very low solubility. [/sup 14/C]. United States: N. p., 1977.
Web. doi:10.1002/app.1977.070210317.
Rhee, C K, & Ferry, J D. Diffusion of radioactively tagged penetrants through rubbery polymers. I. Penetrants with very low solubility. [/sup 14/C]. United States. https://doi.org/10.1002/app.1977.070210317
Rhee, C K, and Ferry, J D. 1977.
"Diffusion of radioactively tagged penetrants through rubbery polymers. I. Penetrants with very low solubility. [/sup 14/C]". United States. https://doi.org/10.1002/app.1977.070210317.
@article{osti_7311396,
title = {Diffusion of radioactively tagged penetrants through rubbery polymers. I. Penetrants with very low solubility. [/sup 14/C]},
author = {Rhee, C K and Ferry, J D},
abstractNote = {The diffusion of radioactively tagged n-hexadecane, 1,7-heptanediol, and ethylene glycol has been studied in one polar and six nonpolar rubbery polymers. The penetrant-polymer pairs included some in which the two components were miscible in all proportions and some in which they were nearly incompatible (solubility of penetrant in polymer of the order of 1 percent). The theory for the thin smear method for measuring the diffusion coefficient was evaluated for incompatible pairs with two cases: case 2, when the rate-limiting step is diffusion through the polymer; and case 3, when the rate-limiting step is entry into the polymer across the penetrant-polymer interface. They are easily distinguished experimentally from each other and from case 1, which refers to completely miscible pairs. The diffusion coefficients, when compared in four hydrocarbon rubbers, of n-hexadecane and 1,7-heptanediol were similar in magnitude even though in each rubber the hexadecane was soluble in all proportions and the diol only very slightly. The diffusion coefficient of ethylene glycol, despite its extreme thermodynamic incompatibility, appeared to be somewhat larger than those of the other penetrants.},
doi = {10.1002/app.1977.070210317},
url = {https://www.osti.gov/biblio/7311396},
journal = {J. Appl. Polym. Sci.; (United States)},
number = ,
volume = 21:3,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1977},
month = {Tue Mar 01 00:00:00 EST 1977}
}