Cationic PS Microspheres Modified GO and its effect on the properties of SBR/BR Rubber Composite materials

To enhance the dispersion and compatibility of graphite oxide (GO) in the rubber matrix, a new method of functional polymer modifying GO was proposed in this study. PS and CPS microspheres were first prepared by dispersion polymerization, then functionalized graphite oxide rGO-PS and rGO-CPS were prepared by electrostatic interaction, then rGO-PS and rGO-CPS were blended with SBR latex to prepare master rubber, and finally rGO-PS/SBR/BR and rGO-CPS/SBR/BR composites were prepared by mechanical blending. SEM analysis showed that functionalized graphite oxide rGO-PS and rGO-CPS formed a good intercalation structure, which effectively prevented the stacking of rGO layers. The fracture surfaces of composite materials rGO-PS/SBR/BR and rGO-CPS/SBR/BR were smooth and flat, indicating that rGO-PS and rGO-CPS were uniformly dispersed within the rubber matrix. Moreover, the analysis of mechanical performance revealed that by incorporating 2.4 wt% of rGO-PS and 3.0 wt% of rGO-CPS, respectively, the tensile strength of the composite materials rGO-PS/SBR/BR and rGO-CPS/SBR/BR increased by 63% and 80% compared to pure SBR/BR, respectively. TGA analysis showed that the 10% thermal decomposition temperature (Td 10 ) of composite materials rGO-PS/SBR/BR and rGO-CPS/SBR/BR was increased by 25.09 ℃ and 30.35 ℃ compared to pure SBR/BR, respectively, indicating that the thermal stability of rubber composite materials was significantly improved.