Treatment of EVA with corona discharge to improve its adhesion to polychloroprene adhesive

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Title: Treatment of EVA with corona discharge to improve its adhesion to polychloroprene adhesive
Authors: Martínez García, Asunción | Sánchez Reche, Ana | Gisbert Soler, Santiago | Cepeda Jiménez, Carmen María | Torregrosa Maciá, Rosa | Martín-Martínez, José Miguel
Research Group/s: Laboratorio de Adhesión y Adhesivos
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Instituto Tecnológico del Juguete
Keywords: Corona discharge | Surface treatment | EVA | Polychloroprene adhesive | Contact angle measurements | ATR-IR spectroscopy | SEM | T-peel strength
Knowledge Area: Química Inorgánica
Date Created: 2002
Issue Date: 2003
Publisher: VSP
Citation: MARTÍNEZ GARCÍA, Asunción, et al. "Treatment of EVA with corona discharge to improve its adhesion to polychloroprene adhesive". Journal of Adhesion Science and Technology. Vol. 17, No. 1 (2003). ISSN 0169-4243, pp. 47-65
Abstract: Ethylene vinyl acetate (EVA) material containing 20 wt% vinyl acetate (EVA20) was treated with corona discharge to improve its adhesion to polychloroprene adhesive. Several experimental variables in the corona discharge treatment of EVA20 were considered: corona energy, type of electrode, and number of consecutive treatments. Advancing contact angle measurements (water, 25±C) showed an increase in the wettability of EVA20 after treatment with corona discharge, which corresponds to an increase in the O/C ratio on the treated surface. The higher the corona energy (i.e. the higher discharge power and longer treatment times), the greater the degree of surface oxidation. Peel strength values of the joints produced with EVA20 using a polychloroprene adhesive containing 5 wt% isocyanate increased from 1.5 kN/m (as-received EVA20) to 4.3 kN/m (corona-treated EVA20). A mixed (adhesional C cohesive in EVA20) locus of failure was obtained in all adhesive joints produced with corona discharge-treatedEVA20. Finally, the number of consecutive corona discharge treatments and the surface area of the electrode (spherical versus hook-shaped electrode) did not greatly influence the adhesion of EVA20 to polychloroprene adhesive.
ISSN: 0169-4243
DOI: 10.1163/15685610360472439
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Appears in Collections:INV - LAA - Artículos de Revistas

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