Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
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JUNE 28 WEDNESDAY MORNING<br />
RIVA-SS-WeM-OR.6 SURFACE ANALYSIS OF NBR ELASTOMERS MODIFIED<br />
WITH DIFFERENT PLASMA TREATMENTS. L. Martínez, L. Álvarez, Y. Huttel, J. Méndez,<br />
E. Román. Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) Cantoblanco, 28049-Madrid,<br />
Spain. A. Vanhulsel, B. Verheyde, R. Jacobs, Flemish Institute for Technological Research (VITO).<br />
Boeretang 200, 2400-MOL, Belgium.<br />
In this work, three rubber–like materials with applications applied in the automotive industry were<br />
studied: two Nitrile Butyl Rubber (NBR 7201 and NBR 9003) and one Hydrogenated Nitrile Butyl<br />
Rubber (HNBR 8001). Different atmospheric pressure plasma treatments were used to modify the<br />
surface properties of these materials in order to improve their tribological (properties). Surface<br />
analysis of the samples by means of X-ray Photoelectron Spectroscopy (XPS) was performed in order<br />
to get information about the surface chemistry and the elemental composition of the contact surfaces.<br />
In addition, wetting experiments were also performed by measuring the contact angle with in<br />
the frame of the sessile drop method. The obtained results allow an evaluation of the surface free energy<br />
of the solids and of the impact of different plasma treatments. The XPS results showed a modification<br />
of the surface composition of both NBR rubbers, while the same treatments produced slight<br />
modifications on the surface chemistry of the HNBR. The main modification was based on an increase<br />
in the oxygen content. The combination of N 2 and CH 3 COOH produced the strongest modifications<br />
of the surface composition of the tested elastomers. All these surface modifications also produced<br />
a change on the surface energy of the rubber-like materials. The results obtained in the contact<br />
angle measurements revealed that the plasma treatments produced a modification of the wettability<br />
of the rubber-like NBRs and, therefore, a modification of their surface free energy.<br />
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