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Materials 2015, 8(8), 5216-5237; doi:10.3390/ma8085216

The Effects of Thermophysical Properties and Environmental Conditions on Fire Performance of Intumescent Coatings on Glass Fibre-Reinforced Epoxy Composites

1
Institute for Materials Research and Innovation, University of Bolton, Bolton BL3 5AB, UK
2
Unité Matériaux et Transformations (UMET)-CNRS UMR 8207-Group Reaction and Resistance to Fire (R2Fire), École Nationale Supérieure de Chimie de Lille, University of Lille, Avenue Mendeleiev, CS 90108, 59652 Villeneuve d'Ascq Cedex, France
*
Author to whom correspondence should be addressed.
Academic Editor: Rodolphe Sonnier
Received: 29 May 2015 / Revised: 21 July 2015 / Accepted: 28 July 2015 / Published: 11 August 2015
View Full-Text   |   Download PDF [2780 KB, uploaded 11 August 2015]   |  

Abstract

Intumescent coatings are commonly used as passive fire protection systems for steel structures. The purpose of this work is to explore whether these can also be used effectively on glass fibre-reinforced epoxy (GRE) composites, considering the flammability of the composites compared to non-flammable steel substrate. The thermal barrier and reaction-to-fire properties of three commercial intumescent coatings on GRE composites have been studied using a cone calorimeter. Their thermophysical properties in terms of heating rate and/or temperature dependent char expansion ratios and thermal conductivities have been measured and correlated. It has been suggested that these two parameters can be used to design coatings to protect composite laminates of defined thicknesses for specified periods of time. The durability of the coatings to water absorption, peeling, impact, and flexural loading were also studied. A strong adhesion between all types of coatings and the substrate was observed. Water soaking had a little effect on the fire performance of epoxy based coatings. All types of 1 mm thick coatings on GRE helped in retaining ~90% of the flexural property after 2 min exposure to 50 kW/m2 heat flux whereas the uncoated laminate underwent severe delamination and loss in structural integrity after 1 min. View Full-Text
Keywords: intumescent coatings; char expansion; cone calorimetry; thermal conductivity at high temperatures; durability; mechanical properties intumescent coatings; char expansion; cone calorimetry; thermal conductivity at high temperatures; durability; mechanical properties
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kandola, B.K.; Luangtriratana, P.; Duquesne, S.; Bourbigot, S. The Effects of Thermophysical Properties and Environmental Conditions on Fire Performance of Intumescent Coatings on Glass Fibre-Reinforced Epoxy Composites. Materials 2015, 8, 5216-5237.

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