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Study of oxidation after monoacrylate grafting on polyethylene

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Iguerb, Ourida [UCL] Demoustier-Champagne, Sophie [UCL] Marchand-Brynaert, Jacqueline [UCL] Daoust, Daniel [UCL] Sclavons, Michel [UCL] Devaux, Jacques [UCL]

BACKGROUND: The surface properties of high-density polyethylene and linear low-density polyethylene were modified by grafting urethane monoacrylate monomer under UV irradiation. This graft polymerization was carried out on native substrates and on substrates pre-treated by wet oxidation, for different oxidation times. RESULTS: As the urethane monacrylate layer is crosslinked, its grafting efficiency was checked by dissolving the polyethylene substrates in hot toluene. Grafting was evidenced by Fourier transform infrared spectroscopy of the obtained residues, which showed that both the characteristic urethane acrylate (3350 cm(-1)) and polyethylene (2920, 730 and 720 cm(-1)) bands were observable for any polyethylene oxidation time. For an oxidation time longer than 10 hours, acrylate grafting was homogeneous and the grafted surface was smooth with a roughness of less than 10 nm. In addition, X-ray photoelectron spectroscopy analysis of the residues revealed that O/C had an average value of 0.19, which is lower than the value corresponding to pure acrylate (0.42), whereas N/C had an average value of 0.068, also lower than that of pure acrylate (0.09), thus confirming the grafting. CONCLUSION: A urethane monoacrylate layer was grafted on native and oxidized polyethylene films. For highly oxidized films, the grafted surfaces are smooth and homogeneous. (C) 2008 Society of Chemical Industry.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2008
Language Anglais
Journal information "Polymer International" - Vol. 57, no. 8, p. 957-964 (2008)
Peer reviewed yes
Publisher John Wiley & Sons Ltd (Chichester)
issn 0959-8103
Publication status Publié
Affiliations UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
UCL - SC/CHIM - Département de chimie
Keywords PE ; photografting ; acrylate ; urethane ; coatings
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Bibliographic reference Iguerb, Ourida ; Demoustier-Champagne, Sophie ; Marchand-Brynaert, Jacqueline ; Daoust, Daniel ; Sclavons, Michel ; et. al. Study of oxidation after monoacrylate grafting on polyethylene. In: Polymer International, Vol. 57, no. 8, p. 957-964 (2008)
Permanent URL http://hdl.handle.net/2078.1/36448