Effects of graphite and boron nitride based fillers on mechanical, thermal conductive, and thermo‐physical properties in solution styrene–butadiene rubber

In the present work, graphite and hexagonal boron nitride (BN) are studied as fillers in order to reinforce physical properties of the solution styrene–butadiene rubber (SSBR). Composites based on SSBR and these two fillers are prepared via kneading followed by hot compression method, and these two hybrid fillers with different wt% into the SSBR composites are also produced. The effects of different wt% on the morphology, tensile strength, thermal conductivity, and thermal properties are investigated. From the test results, using each of the filler can increase the mechanical properties and thermal conductivity, whereas the effectiveness of graphite remarkably increased the tensile strength and thermal conductivity. The composites of the hybrid filler systems have better mechanical performance compared to the SSBR filled with BN, and they are all inferior to the SSBR filled with graphite. In addition, the test showed that the thermal conductivity of the composites of the hybrid filler systems is comparable with SSBR filled with BN. POLYM. COMPOS., 40:E1426–E1433, 2019. © 2018 Society of Plastics Engineers