Investigation of the effect of styrene content on the ultimate curing of vinylester resins by TGA-FTIR

Cardona, F. and Rogers, D. and Davey, S. and Van Erp, G. (2007) Investigation of the effect of styrene content on the ultimate curing of vinylester resins by TGA-FTIR. Journal of Composite Materials, 41 (2). pp. 137-152. ISSN 0021-9983

Abstract

The influence of styrene content on styrene added vinylester resin (VER) is investigated. The network structure and its thermal properties is investigated by DSC and the combination of TGA and FTIR (TGA–FTIR). The glass transition temperatures(Tgs) of the resins are found to decrease systematically with increasing styrene content, which decreases the cross-link density of the cured materials. The Tg of VERsamplescured97–98% is significantly lower, by as much as 25C, than the Tg of a fully cured (100%)sample. This is due to the plasticizing effect of unreacted styrene in the network. The combination of TGA and FTIR confirm the evolution of gaseous styrene moieties at the degradation temperature of vinylester groups, the relative amount of styrene emitted being higher with increasing styrene content. A good correlation is found between the thermal properties by DSC and the results obtained from the TGA–FTIR system.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting Author's version. Deposited in accordance with the copyright policy of the publisher. 'Copyright 2007 Sage Publications. This is the authors' version of the work. It is posted here with permission of the publisher for your personal use. No further distribution is permitted. For the definitive version of this article, please refer to the journal. To access the journal's website, use hypertext links above.'
Depositing User: Dr Francisco Cardona
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 01:20
Last Modified: 02 Jul 2013 22:49
Uncontrolled Keywords: TGA–FTIR; styrene; vinylester; Tg; cross-link density; plasticizing effect
Fields of Research (FOR2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030305 Polymerisation Mechanisms
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1177/002199830?063357
URI: http://eprints.usq.edu.au/id/eprint/3122

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