RT Conference Proceedings
T1 Approaches to poly(tetrafluoroethylene) adhesive bonding
A1 Encinas García, Noemí
A1 Pantoja Ruiz, Mariola
A1 Martínez Casanova, Miguel Ángel
A1 Torres Remiro, M.
AB In this work, we present an approach to achieve improved adhesive bonding with a poly(tetrafluoroethylene) (PTFE) substrate. Surfaces were modified by abrasion, atmospheric air plasma torch (APPT) treatment, and by immersion in basic (NaOH) and strongly acidic/oxidizing (HNO3/KMnO4) solutions. The wetting properties of the polymer were studied in terms of surface energy, and adhesion tests were carried out using polyurethane, acrylic, and epoxy adhesives. The surface characterisation included surface energy calculation through contact angle measurements, infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), and X-ray electron diffraction (EDX). Adhesion was evaluated by pull-off tests following the UNE EN-24624 standard. Experiments revealed that both oxidation and plasma treatment enhanced surface energy, defluorination, and the creation of a rougher PTFE surface, resulting in adhesion. Simple oxidation and its combination with plasma treatments yielded the higher tensile strength results, with epoxy as the most suitable adhesive among those studied. Samples presented adhesive or mixed type failure modes.
PB Taylor & Francis
SN 0021-8464
YR 2011
FD 2011-08-30
LK https://hdl.handle.net/10016/23000
UL https://hdl.handle.net/10016/23000
LA eng
NO Presented in part at the 4th International Conference on Advanced Computational Engineering and Experimenting (ACE X 2010), Special session on "Adhesive bonding", Paris, France, 8 9 July 2010
DS e-Archivo
RD 18 jul. 2024