Iodine diffusion in ion-modified polyethylene (PE) using the Rutherford Backscattering method (RBS) has been studied. P E was irradiated by N+, Ar+ and As+ ions with an energy of 150 keV and doses of 1 X 1013-1 X 1015 cm12. Iodine diffused in ion-modified PE from vapor at 9OoC. Iodine's concentratio
Free-volume microprobe study of iodine diffusion in polymers
β Scribed by R Ramani; C Ranganathaiah
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 176 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0959-8103
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The development of a new model for the diffusion of gas molecules in glassy polymers is presented which utilizes concepts from free volume theory and relies on a dual-mode interpretation of sorptive dilation in glassy polymers. Three assumptions are made in the development of the model. First, the f
Several versions of free-volume theory have been proposed to correlate or predict the solvent diffusion coefficient of a polymer/solvent system. The quantity of free volume is usually determined by the Williams-Landel-Ferry (WLF) equation from viscosity data of the pure component in these theories.