Permeation of oxygen and water vapor through EVOH films as influenced by relative humidity
| Autor: | Ian J. Britt, Zhongbin Zhang, Marvin A. Tung |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics chemistry.chemical_element General Chemistry Polymer Permeation Oxygen Surfaces Coatings and Films Oxygen transmission rate chemistry Chemical engineering Permeability (electromagnetism) Polymer chemistry Materials Chemistry Gaseous diffusion Relative humidity Water vapor |
| Zdroj: | Journal of Applied Polymer Science. 82:1866-1872 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.2030 |
| Popis: | The transport properties of oxygen and water vapor through EVOH films as functions of relative humidity (RH) and temperature were studied. The results of oxygen and water vapor permeation demonstrated that temperature and RH markedly affected barrier properties of these films. In general, the EVOH films had minimal oxygen and water vapor permeabilities at a low RH, attributed to the reduced mobility of the polymer resulting from strong interactions between small water molecules and the polymeric matrix at low RH. Beyond 75% RH, the permeabilities increased considerably. In addition, the barrier performance of the EVOH films was found to be dependent on their ethylene content and orientation. From the experimental data, semiempirical equations describing oxygen transmission rates (O2TR) as functions of RH and temperature were developed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1866–1872, 2001 |
| Databáze: | OpenAIRE |
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