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Development of improved polypropylene adhesive bonding by abrasion and atmospheric plasma surface modifications

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dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Comportamiento en Servicio de Materialeses
dc.contributor.authorEncinas García, Noemí
dc.contributor.authorAbenojar Buendía, Juana
dc.contributor.authorMartínez Casanova, Miguel Ángel
dc.date.accessioned2016-05-24T13:00:46Z
dc.date.available2016-05-24T13:00:46Z
dc.date.issued2012-03
dc.description.abstractThe present work deals with the problematic adhesive bonding of substrates with low surface energy. Different approaches have been explored with the aim of creating adequate adhesive joints based on polyolefinic substrate and polyurethane adhesive. The selected material under study was polypropylene (PP) as adherend, and a commercial Sikaflex®-252 polyurethane one component based structural adhesive (PU) as joint fluid. Among the diverse pre-treatments typically used to prepare surfaces prior to bonding, mechanical abrasion with emery paper of 80 grain size, the use of a chemical primer and atmospheric pressure air plasma torch (APPT) were the selected methods to facilitate the application of the PU by means of surface energy enhancement as well as to create a correct mechanical interlocking of the adherent-adhesive interface. Changes in the wettability of the polymer were evaluated by contact angle measurements following the UNE EN 828:2010. Surface energy was calculated both in terms of Owens approximation and acid-base considerations, leading to the possibility of determining a relationship between changes in surface energy and adhesion. Changes in the chemical composition of the surface were studied by X-ray photoelectron spectroscopy (XPS), electron diffraction X-Ray (EDX) probe and attenuated total multiple reflection mode infrared spectroscopy (ATR-FTIR). Morphological modifications were investigated with scanning electron microscopy (SEM). Variations in the strength of single-lap PP-PP joints with the treatments were evaluated by lap shear tests following the UNE-EN 1465:2008 standard. Experimental evidence supports the superiority of the APPT treatment to increase wettability and adhesion of polyolefinic surfaces, especially when combined with the use of a primer.en
dc.description.sponsorshipFinancial support from the Universidad Carlos III de Madrid Foundation and Chemistry and Materials Technological Institute ‘‘Álvaro Alonso Barba’’ is acknowledged. Also Sika S.A.U (Spain) is acknowledged.en
dc.format.extent6es
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationInternational journal of adhesion & adhesives 33 (2012), pp. 1-6en
dc.identifier.doi10.1016/j.ijadhadh.2011.10.002
dc.identifier.issn0143-7496
dc.identifier.publicationfirstpage1es
dc.identifier.publicationlastpage6es
dc.identifier.publicationtitleInternational journal of adhesion & adhesivesen
dc.identifier.publicationvolume33es
dc.identifier.urihttp://hdl.handle.net/10016/23082
dc.identifier.uxxiAR/0000009727
dc.language.isoengen
dc.publisherElsevier Ltd.es
dc.relation.ispartofhttp://hdl.handle.net/10016/16155
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ijadhadh.2011.10.002es
dc.rights© 2011 Elsevier Ltd.es
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaMaterialeses
dc.subject.otherPolymeric surface preparationen
dc.subject.otherWettabilityen
dc.subject.otherLewis acid and baseen
dc.subject.otherWork of adhesionen
dc.subject.otherAtmospheric pressure plasma torchen
dc.subject.otherPrimeren
dc.subject.otherPolyurethaneen
dc.subject.otherPolypropyleneen
dc.subject.otherAdhesionen
dc.titleDevelopment of improved polypropylene adhesive bonding by abrasion and atmospheric plasma surface modificationsen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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