The performance of waste disulfide oil (DSO) on the devulcanization of waste tires

The mechano-chemical devulcanization of waste tire was carried out in internal mixer by means of disulfide oil (DSO) as a devulcanizing agent. DSO is the undesirable and waste product of gas refineries. Following to the study, the effect of the concentration of DSO, were studied, so the optimum condition of the devulcanization process was determined. The degree of devulcanization was calculated by using sol content, gel content and volume fraction of rubber after swelling. The percent of the devulcanization (73%) indicated that the optimum concentration of DSO was 5 phr at 100oC and 15 min. subsequently, the devulcanized rubber was blended with virgin rubber in different ratios to assess the reusability of waste tire. Moreover, the mechanical properties of the revulcanized blends were studied. As results showed, the mechanical properties and abrasion did not have significant changes by replacing of about 30% of devulcanized rubber. This provided a new method for reusing of the waste tires

Keywords:

disulfide oil , mechanochemical devulcanization , waste tires , mechanical properties