Research On The Dynamic Heating Built-up And Barrier Properties Of Rubber/Kaolin Composites

The kaolin sample was analysed by mineralogy method and processed withrefinement and modification, the dispersion degree of kaolin and the interacton offiller-filler and filler-polymer in rubber matrix were researched. The affection of thekaolin powder particle size, surface properties, contents of filler and the structuretypes of fillers on the mechanical properties, dynamic heating performance and thegas barrier properties of kaolinite/rubber composites was systermatically analysised.The research results indicate that the kaolin has significantly improved the physicalmechanical properties and the processing performance of rubber composites.then, thereinforcing mechanism of kaolin filler in rubber was analysised. In the compositesmatrix, the aggregation and network of kaolin filler is the main factor which resultedlag heating of composite materials. Kaolin filler showed a weaker effection of―Payne‖and lower heat build-up than the traditional fillers, such as Carbon black andprecipitated silica.The mechanism of the kaolin network is the contaction of fillerparticles and the rubber molecular chain segments adsorped on the surface of filler.The kaolin filler has effectively improved the gas barrier properties of compositematerials. Acoordingly, the math barrier model of kaolin filler in the compositematerials were established, which can be applied to predicted and calculatedpermeability coefficient of the composite material filler by kaolin filler. Finally thebarrier mechanism of kaolin filler in rubber was discussed and explained based on thethe combination of experimental results and math barrier model.