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Modified graphite filled natural rubber composites with good thermal conductivity
Authors:Junping Song  Lianxiang Ma  Yan He  Haiquan Yan  Zan Wu  Wei Li
Affiliation:1.Qingdao University of Science and Technology, Qingdao 266061, China;2.Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China;3.Department of Energy Sciences, Lund University, Lund SE-22100, Sweden
Abstract:The rubber composites with good thermal conductivity contribute to heat dissipation of tires. Graphite filled natural rubber composites were developed in this study to provide good thermal conductivity. Graphite was coated with polyacrylate polymerized by monomers including methyl methacrylate, n-butyl acrylate and acrylic acid. The ratios between a filler and acrylate polymerization emulsion and those between monomers were varied. Eight types of surface modification formulas were experimentally investigated. Modification formula can affect coating results and composite properties greatly. The best coating type was achieved by a ratio of 1:1 between methyl methacrylate and n-butyl acrylate. The coating of graphite was thermal y stable in a running tire. Filled with modified graphite, the tire thermal conductivity reached up to 0.517–0.569 W·m-1·K-1. In addition, the mechanical performance was improved with increased crosslink density, extended scorch time and short vulcanization time.
Keywords:Graphite  Natural rubber  Thermal conductivity  Tire  Polyacrylate
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