Novel rolltruded films. II. Effect of draw ratio on the gas transport properties of rolltruded isotactic poly (propylene)
| Autor: | R. J. Ciora, Joseph H. Magill |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Activation energy Polymer Condensed Matter Physics Thermal diffusivity Calendering Amorphous solid Chemical engineering chemistry Tacticity Polymer chemistry Materials Chemistry Gaseous diffusion Physical and Theoretical Chemistry Solubility |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 32:305-312 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.1994.090320212 |
| Popis: | Modification of the gas transport properties of rolltruded isotactic poly(propylene) films have been studied. Changes in the amorphous solubility, diffusivity, and the activation energies of CO2, N2, and CH4 in iPP rolltruded at 150°C for draw ratios to ca. 20 are recorded. At this processing temperature variations in the transport coefficients have been found to be weakly dependent upon draw ratio and do not suffer the dramatic reductions often reported in uniaxially drawn polymers. In general, the morphological differences between uniaxially drawn and rolltruded films are subtle and are responsible for the significant difference in the measured transport properties. © 1994 John Wiley & Sons, Inc. |
| Databáze: | OpenAIRE |
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