Gas permeability of thin dense films from polymer blend of thermoplastic elastomer and polyolefin
Article first published online: 26 MAY 2013
Copyright © 2013 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 1, January 5, 2014
How to Cite
2014), Gas permeability of thin dense films from polymer blend of thermoplastic elastomer and polyolefin. J. Appl. Polym. Sci., 131, 39386, doi: 10.1002/app.39386, , , , and (
- Issue published online: 11 OCT 2013
- Article first published online: 26 MAY 2013
- Manuscript Accepted: 4 APR 2013
- Manuscript Received: 14 JAN 2013
- structure-property relations
Stretched thin films composed of a thermoplastic elastomer, a polystyrene-block-poly(ethylene butylene)-block-polystyrene triblock copolymer (SEBS), and polyolefins, poly(ethylene-co-ethylacrylate) and poly(ethylene-co-propylene), were obtained by blow-molding, uniaxial stretching, and cooling to room temperature and the gas permeability of the stretched films was investigated. When the as-blown annealed film was subjected to uniaxial stretching in the machine direction, PO2 and PN2 increased with an increase in the stretching ratio K and approached a constant value at high stretching ratios. In addition, PO2/PN2 decreased gradually with K and approached a value of 2.95–3.0. The reason for this unique gas permeation behavior is that the molecular mobility of poly(ethylene butylene) chains in a direction normal to the film increases and reaches an equilibrium state at around K = 4.5. The change in gas permeability of the stretched films can be explained using a deformation model for the SEBS matrix. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39386.