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A study of the effects of postcure treatments on polyester-melamine coating matrices

journal contribution
posted on 06.12.2017, 00:00 by N Gamage, D Hill, P Pomery, C Lukey
The effect of postcure high energy (ƴ), ultraviolet (UV) and thermal treatment on the properties of polyester–melamine clearcoats of a range of compositions has been investigated. Two initial cure conditions were used, of which one was “optimally” cured and the other undercured. It was found that postcure treatments, particularly ƴ and UV, led to coatings of similar mechanical and thermal properties irrespective of initial cure, although the change in properties on postcure treatment was greater for the under-cured samples. The results were interpreted in terms of the effect of the treatments on the structure of the crosslinked matrices. The study suggests the possibility of the development of a dual-cure process for polyester–melamines, whereby cure optimization and property improvement can be achieved. This could also be used to “correct” for small variations in thermal cure levels brought about by adventitious online fluctuations in cure oven conditions.

History

Volume

46

Issue

4

Start Page

532

End Page

539

Number of Pages

8

eISSN

1548-2634

ISSN

0032-3888

Location

United States

Publisher

John Wiley & Sons, Inc.

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of Queensland; University of Wollongong;

Era Eligible

Yes

Journal

Polymer engineering and science.