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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/61633
Title: Gas transport in surface-modified low-density polyethylene films with acrylic acid as a grafting agent
Authors: Costamagna, Vanina; Strumia, Miriam; López-González, Mar; Riande, Evaristo
Keywords: diffusion
enthalpic parameter
gas transport
low-density polyethylene films
poly(acrylic acid) layer
Issue Date: 2006
Publisher: John Wiley & Sons
Citation: Journal of Polymer Science Part B: Polymer Physics 44 (19) : 2828–2840 (2006)
Abstract: The modification of polyethylene by the grafting of poly(acrylic acid) onto the surface of one of the faces of low-density polyethylene films with UV radiation is reported. The transport of oxygen, nitrogen, carbon monoxide, carbon dioxide, methane, ethane, ethylene, propane, and argon across surface-modified films containing 3.7% poly(acrylic acid) has been investigated at several temperatures. The layer of poly(acrylic acid) grafted onto the surface of one of the faces of the films reduces the permeability coefficient of the gases by a factor of about 1/6. The sharp drop in the gas permeability as a result of the poly(acrylic acid) layer may arise either from the formation of ordered structures of the grafted chains or from the development of highly crosslinked structures. The values of the polymer–gas enthalpic interaction parameter for the modified film are higher than those for the unmodified one
Publisher version (URL): http://dx.doi.org/10.1002/polb.20945
URI: http://hdl.handle.net/10261/61633
DOI: 10.1002/polb.20945
ISSN: 0887-6266
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