用聚乙烯吡咯烷酮( PVP )改性氧化石墨烯( GO ),再将 PVP 改性 GO ( PGO )与丁苯橡胶(SBR)胶乳共凝制得PGO/SBR硫化胶,通过X射线衍射法(XRD)和扫描电子显微镜(SEM)分析了PGO在SBR基体中的分散状况,考察了PVP用量对SBR硫化胶性能的影响。结果表明,在PGO/SBR硫化胶中,PGO被完全剥离,均匀分散在SBR基体中；当PVP/GO(质量比)为3时,PGO/SBR硫化胶的交联密度达到最大值,比GO/SBR硫化胶增大了46．3%,物理机械性能、热稳定性能、导热性能和耐溶剂性能达到最佳,相比GO/SBR硫化胶,拉伸强度、100%定伸应力和撕裂强度分别提高了43%,315%,22%,最大分解温度升高了5．71℃,导热系数增加了11．7%,平衡溶剂吸附量下降了37．1%。%Graphene oxide ( GO ) was modified with polyvinyl pyrrolidone ( PVP ) , and then PVP modified GO ( PGO )/styrene-butadiene rubber ( SBR) vulcanizates were prepared by coagulation of PGO suspension with SBR latex. The dispersion of PGO in SBR matrix was characterized by X-ray di-ffraction and scanning electron microscope, and the effects of PVP amount on the properties of PGO/SBR vulcanizates were investigated. The results showed that PGO was completely exfoliated and dispersed homogeneously in the SBR matrix. When the mass ratio of PVP/GO was 3 , the maximum crosslinking density of PGO/SBR vulcanizates was achieved, which was increased by 46. 3% compared with that of GO/SBR vulcanizates. Meanwhile, the optimum mechanical properties, thermal stability, thermal conductivity and solvent resistance of PGO/SBR vul-canizates were obtained. The tensile strength, mo dulus at 100% and tear strength of PGO/SBR vulca-nizates were enhanced by 43%, 315% and 22%, respectively,compared with those of GO/SBR vulca-nizates . In additon, the maximum temperature of heat decomposition was improved by 5. 71 ℃, the thermal conductivity had an 11. 7% increment, the equilibrium solvent adsorption was decreased by 37. 1%.
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