氧化亚铁硫杆菌脱硫胎面胶粉/丁苯橡胶并用胶的性能研究

采用氧化亚铁硫杆菌对胎面胶粉（GTR）进行脱硫再生，将生物脱硫胎面胶粉（DGTR）与丁苯橡胶（SBR）共混制备DGTR/SBR并用胶，并对其性能进行研究。结果表明：从氧化亚铁硫杆菌与GTR共培养脱硫再生过程发现，氧化亚铁硫杆菌可以代谢硫化胶粉中的化合硫，脱硫后胶粉的溶胶质量分数增大；与GTR/SBR并用胶相比，DGTR/SBR并用胶的交联密度较小，物理性能显著提高；DGTR/SBR并用胶分子间的摩擦阻力减小，玻璃化温度降低；与GTR相比，DGTR与SBR的界面结合更好。;Desulfurized ground tire rubber（DGTR） was produced by thiobacillus ferrooxidans de-sulfurization and blended with SBR，and the properties of DGTR/SBR composites were investigated.The results showed that，in the desulfurization regeneration of ground tire rubber（GTR），combined sulfur on the surface of GTR was oxidized by thiobacillus ferrooxidans，and the sol fraction of DGTR was increased.Compared with GTR/SBR blend，the DGTR/SBR blend possessed lower crosslink density and significantly better physical properties.DMA test results indicated that the molecular chain friction of DGTR/SBR blend was decreased and the glass transition temperature was reduced.It was also found by SEM that，compared with GTR/SBR，the interfacial cohesion between DGTR and SBR was better