Moisture-sorption characteristics of starch/low-density polyethylene films
| Autor: | Kundan Kumar, A. Eugene Raj, Baldev Raj, Siddarramaiah |
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| Rok vydání: | 2002 |
| Předmět: |
Materials science
Coefficient of determination Polymers and Plastics Moisture Water activity Capillary condensation Starch Thermodynamics Sorption General Chemistry Polyethylene Surfaces Coatings and Films chemistry.chemical_compound Low-density polyethylene chemistry Polymer chemistry Materials Chemistry |
| Zdroj: | Journal of Applied Polymer Science. 84:1193-1202 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.10417 |
| Popis: | Moisture-sorption characteristics of starch/low-density polyethylene (LDPE) blends were carried out at 27°C for water activity (a w ) from 0.1 to 0.9. The sorption data were used to fit six different sorption isotherm models proposed in the literature. The model constants were determined by linear fitting of the sorption equations. The ranges of applicability of water activity for the isotherm models reported in the article lies between 0.1 and 0.4 (monomolecular layer) for the BET model and between 0.3 and 0.9 (multimolecular and capillary condensation layers) for other models. The value of the coefficient of determination (R 2 = 0.97 ± 0.02) confirms the linear fitting of the equations studied. |
| Databáze: | OpenAIRE |
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