Impact of Basalt Filler on Thermal and Mechanical Properties, as Well as Fire Hazard, of Silicone Rubber Composites, Including Ceramizable Composites

Abstract

This article illustrates the impact of basalt filler, both in the form of basalt flakes and basalt fibers, on thermal and mechanical properties, as well as on the fire hazard, of silicone rubber (SR) composites, including ceramizable composites. In addition to basalt filler, ceramizable composites contain mineral fillers in their composition in the form of silica and calcium carbonate, inorganic fluxes such as zinc borate and glass frit, and melamine cyanurate as a flame retardant. The obtained composites were analyzed from the point of view of their morphology, rheological and thermal properties, flammability, and mechanical properties before and after the ceramization process. The obtained research results indicate that the basalt filler has an unambiguous impact on the improvement of thermal properties and the reduction of flammability in the analyzed composites. The results of morphological analyses of ceramizable composites before and after the process of their ceramization indicate a definite impact of the basalt filler on the structure of the formed ceramic layer. An increase in its homogeneity exerts a direct impact on the improvement of its mechanical parameters.

Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites

“…On the other hand, neither the application of basalt fibers nor of basalt flakes led to visible changes in the tensile strength of EPDM. A similar effect was observed in our previous work on silicone rubber composites filled with differently structured basalt fillers [ 33 ]. The poor reinforcing activity of basalt fillers may be explained by their weak interfacial connection with the elastomer matrix.…”

“…The HRRMAX parameter, which is the key value illustrating combustion dynamics, was 59.8% lower in the case of the composite containing BFL (EPDM 6), whereas it was 64.8% lower in the case of the composite containing BFS (EPDM 8). The better performance of BFS over BFL is related to the better dispersion of BFS in the polymer matrix compared to BFL [ 33 ].…”

Mechanical and Thermal Degradation Kinetic Study of Basalt Filled Polyvinyl Chloride Composite Material

“…It can be seen the residue after decomposition of composite with content BRP of (58.8, 48.8, 38.8, 28.8, 18.8) weight percent were (59.99, 52.26, 28.88, 36.49, 27.96) weight percent respectively, however this indicates that mineral fillers act as a retarder on thermal decomposition consequently thermal stability increased. This is in convenience with the previous literatures [26]. The typical DTG under nitrogen atmosphere at a heating rate of 10 Co/min are shown in Fig 3.…”

Ceramization Mechanism of Ceramizable Silicone Rubber Composites with Nano Silica at Low Temperature

“…There are many achievements in the research on the formulation and processing of ceramizable silicone rubber composites [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], but research on the ceramization process and mechanism is not enough. Hanu et al [ 1 , 2 , 3 ] researched the ceramization mechanism of mica/silicone rubber composites, and put forward that ceramization was a process where the edge of mica melted and reacted with silica, which was the residue of silicone rubber, and the liquid phase connected the fillers and improved the residual strength.…”