Sandwich Structure Composite with Expandable Graphite Filled or Coated: Evaluation of Flame Retardancy and Mechanical Performances
Open Access
- 1 January 2019
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in Open Journal of Safety Science and Technology
- Vol. 09 (01), 7-21
- https://doi.org/10.4236/ojsst.2019.91002
Abstract
Sandwich composites are increasingly used in high-performance application due to their high specific stiffness, strength and thermal insulation. The sandwich composites were developed using honeycomb and carbon fibre reinforced composite face sheet in this study. Expandable graphite (EG) weighting 5 wt% and 10 wt% were filled in honeycomb or coated on face sheet to improve the fireproof performance. The vertical burning test, cone calorimetry test, thermal insulation analysis, scanning electron microscopy and mechanical test were taken into account. With the increase of EG in the sandwich composites, a significant improvement on flame retardancy with better thermal insulation, lower values of peak heat release rate and MAHRE were confirmed for sandwich composite with EG both coated and filled. In addition, the sandwich with EG coated on face sheet presented better fire resistivity and thermal insulation properties when compared to that with EG filled in honeycomb. However, more total smoke release was also observed for EG coated composites due to partial combustion of resin within sufficient heat and oxygen. Furthermore, no significant effect on the mechanical properties of composites was confirmed from both fireproof approaches.Keywords
This publication has 21 references indexed in Scilit:
- Post-fire mechanical properties of sandwich composite structuresComposite Structures, 2015
- Flame retardant polymer compositesFibers and Polymers, 2015
- Characterization of commercial expandable graphite fire retardantsThermochimica Acta, 2014
- Flexible PVC flame retarded with expandable graphitePolymer Degradation and Stability, 2014
- Fire-Protective and Flame-Retardant Coatings - A State-of-the-Art ReviewJournal of Fire Sciences, 2011
- Fiber-reinforced epoxy composites exposed to high temperature environments. Part II: modeling mechanical property degradationJournal of Composite Materials, 2010
- Thermo-mechanical Responses of Fiber-reinforced Epoxy Composites Exposed to High Temperature Environments. Part I: Experimental Data AcquisitionJournal of Composite Materials, 2010
- Recent Developments in Halogen Free Flame Retardants for Epoxy Resins for Electrical and Electronic ApplicationsMaterials, 2010
- New prospects in flame retardant polymer materials: From fundamentals to nanocompositesMaterials Science and Engineering: R: Reports, 2009
- Compression moulding of glass and polypropylene composites for optimised macro- and micro- mechanical properties 3. Sandwich structures of GMTS and commingled fabricsComposites Science and Technology, 1999