Improvement of adhesion and paint ability of EVA copolymers with different vinyl acetate contents by treatment with UV-ozone

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Títol: Improvement of adhesion and paint ability of EVA copolymers with different vinyl acetate contents by treatment with UV-ozone
Autors: Landete-Ruiz, María Dolores | Martín-Martínez, José Miguel
Grups d'investigació o GITE: Adhesión y Adhesivos
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Inorgánica
Paraules clau: Polyolefins | Surface treatment | Peel
Àrees de coneixement: Química Inorgánica
Data de publicació: d’abril-2015
Editor: Elsevier
Citació bibliogràfica: International Journal of Adhesion and Adhesives. 2015, 58: 34-43. doi:10.1016/j.ijadhadh.2015.01.003
Resum: The surface modifications produced by UV-ozone treatment of two ethylene-vinyl acetate (EVA) copolymers containing 12 and 20 wt% vinyl acetate (EVA12 and EVA20 respectively) were studied. The treatment with UV-ozone improved the wettability of both EVAs due to the creation of new carbon–oxygen moieties. The extent of these modifications increased with increasing length of the treatment and the modifications produced in EVA20 were produced for shorter lengths of treatment. The UV-ozone treatment also created roughness and heterogeneities on the EVA surfaces. Whereas roughness formation prevailed on the UV-ozone treated EVA12, important ablation was dominant on the treated EVA20. T-peel strength values in joints made with polychloroprene adhesive increased when the EVAs were treated with UV-ozone. Short length of UV-ozone treatment (1 min) produced higher T-peel strength in joints made with EVA20 whereas higher T-peel strength values in joints made with EVA12 were obtained after treatment for 5–7.5 min in which a cohesive failure into a weak boundary layer on the treated EVA surface was found. Furthermore, the adhesion of UV-ozone treated EVA20 to acrylic paint increased. Finally, the ageing resistance of the treated EVA/polychloroprene adhesive joints was good and the surface modifications on the UV-ozone treated EVAs lasted for 24 h after treatment at least.
Patrocinadors: Financial support from Research Spanish Agency MICYT (projects MAT2002-02463 and PETRI95-0578-OP) is acknowledged.
ISSN: 0143-7496 (Print) | 1879-0127 (Online)
DOI: 10.1016/j.ijadhadh.2015.01.003
Idioma: eng
Tipus: info:eu-repo/semantics/article
Drets: © 2015 Elsevier Ltd.
Revisió científica: si
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