University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Surface characterization of polyester resins formulated with different cross-linking agents

Marino, P, Lowe, C, Abel, M-L and Watts, JF (2008) Surface characterization of polyester resins formulated with different cross-linking agents SURFACE AND INTERFACE ANALYSIS, 40 (3-4). 137 - 141. ISSN 0142-2421

[img] Microsoft Word
Surface Characterization of Polyester Resins Formulated with Different Crosslinking Agents Merged.doc
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (468kB) | Request a copy
[img]
Preview
PDF
Surface Characterization of Polyester Resins Formulated wi….pdf
Available under License : See the attached licence file.

Download (211kB)
[img]
Preview
PDF (licence)
SRI_deposit_agreement.pdf

Download (33kB)

Abstract

Coil Coating is an industrial process widely used to apply a paint layer to metal coil stock, in order to improve the resistance to corrosion as well as the aestetics of the surface. Three thermally cured coatings, formulated on a low Tg ispophtalic based polyester, were investigated by XPS and ToF-SIMS. A model formulation was employed for all three coatings investigated, however, the crosslinking agents used were varied for each formulation. Hexamethoxymethyl melamine (HMMM), tris isocyanurate (TIC) and a combination of HMMM and TIC were included as the cross linking agents in the three coating formulations. The use of TIC alone required a Sn based catalyst to promote the curing reaction. The aim of this work was to investigate the difference in the surface composition of the three coatings and the different behaviour of the different crosslinking agents used. This was in preparation for further studies which will involve interfacial analysis in order to elucidate the mechanism behind intercoat adhesion. The XPS analysis of the air/coating surfaces revealed a nitrogen concentration consistent with the concentration expected from the formulation for the coating containing HMMM. In the other two formulations a lower concentration then that calculated from the formulation was observed. The surface concentration of the two crosslinking agents is not influenced by the presence of the others, indeed the formulation containing both crosslinking agents is, in term of nitrogen concentration, merely a simple combination of the other two coatings. Peaks diagnostic of the cross linking agents were observed in ToF-SIMS spectra acquired from the air/coating surfaces. The coating with HMMM revealed peaks not present on the coating with TIC and vice versa, however the coating with a combination of HMMM and TIC showed all the peaks, with different relative intensities. In the positive spectrum of the sample with TIC the characteristic pattern of the tin catalyst can be observed. By XPS and ToF-SIMS analysis, we have been able to determinate that the HMMM and the TIC have a different distribution on the coating/air surface. Their distribution is not affected by the presence of the other crosslinking agent.

Item Type: Article
Additional Information: The definitive version is available at http://onlinelibrary.wiley.com/doi/10.1002/sia.2767/abstract
Uncontrolled Keywords: Science & Technology, Physical Sciences, Chemistry, Physical, Chemistry, coil coating, polyester, XPS, ToF-SIMS, cross-linker, HIGH-RESOLUTION XPS
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Depositing User: Symplectic Elements
Date Deposited: 11 Jul 2012 16:16
Last Modified: 23 Sep 2013 19:33
URI: http://epubs.surrey.ac.uk/id/eprint/712205

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800