XPS Study of the Surface of UV Cured Acrylates

doi:10.7517/j.issn.1674-0475.2006.06.428

Abstract

Abstract: The epoxy acrylate resins were UV cured under different atmospheres (air and N₂) and characterized with X-ray photoelectron spectroscopy at two different take-off angles, namely 60° and 90°. The results obtained indicate that different curing environments result in the change of surface energy of the films. Compared with the film cured in the air, the binding energies of C1s and O1s on the surface of the film cured in N₂ move to lower ones. The content of C—C/C—H is higher than that cured in the air, whereas the contents of CO and C—O are lower in both cases. As for the film cured in the air, the content of the single-bond oxygen with high binding energy is higher than that cured in N₂. Both the binding energy of C1s and O1s and the atomic contents are different between the surface and substrate interface of the films. For example, the binding energy of C1s on the surface and glass interface of the film cured in N₂ are 286.62 eV and 287.48 eV, respectively. Besides, the atomic concentration in the films presents gradient distribution from the most external surface toward the bulk. The contents of CO and C—O increase from surface to bulk, and the content of C—C/C—H decreases from surface to bulk, which is caused by the migration of the compositions during the curing process.

Key words: surface energy, XPS, binding energy, atom concentration

CLC Number:

LUO Yan, WANG De-hai, CAI Yan-qing. XPS Study of the Surface of UV Cured Acrylates[J]. Imaging Science and Photochemistry, 2006, 24(6): 428-435.

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