Synergistic Effect of Mica, Glass Frit, and Melamine Cyanurate for Improving Fire Resistance of Styrene-Butadiene Rubber Composites Destined for Ceramizable Coatings

Mateusz Imiela,Przemysław Rybiński,Dariusz Bieliński,Rafał Anyszka,Bartłomiej Syrek,Magdalena Lipińska

doi:10.3390/coatings9030170

Mateusz Imiela, Przemysław Rybiński + Show 4 more

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https://doi.org/10.3390/coatings9030170

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Abstract

Synergistic effects of different fillers are widely utilized in polymer technology. The combination of various types of fillers is used to improve various properties of polymer composites. In this paper, a synergistic effect of flame retardants was tested to improve the performance of ceramizable composites. The composites were based of styrene-butadiene rubber (SBR) used as polymer matrix. Three different types of flame retardants were tested for synergistic effect: Mica (phlogopite) high aspect-ratio platelets, along with low softening point temperature glass frit (featuring ceramization effect), and melamine cyanurate, a commonly used flame retardant promoting carbonaceous char. In order to characterize the properties of the composites, combustibility, thermal stability, viscoelastic properties, micromorphology, and mechanical properties were tested before and after ceramization. The results obtained show that the synergistic effect of ceramization promoting fillers and melamine cyanurate was especially visible with respect to the flame retardant properties resulting in a significant improvement of fire resistance of the composites.

Highlights

Ceramizable polymer composites were originally designed and developed for cable coatings ensuring integration of an electric installation in case of a fire-hazard [1,2,3]
The synergistic effect is visible for the fire resistance capacity of the composites measured by cone calorimetry, in which case, parameter improvement can reach six times better properties
Rheological properties of the mixes are significantly affected by the synergistic effect of mica/glass frit/melamine cyanurate (MCA) compositions

Summary

Introduction

Ceramizable (ceramifiable) polymer composites were originally designed and developed for cable coatings ensuring integration of an electric installation in case of a fire-hazard [1,2,3]. Such approach resulted in a significant enhancement in evacuation techniques and fire-fighting systems. Ceramizable polymer composites are a type of smart materials changing their structure and properties when exposed to fire and elevated temperature.

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