Obtaining and using of reclaimed butyl rubber with the use of ionizing radiation

The phenolic cured butyl rubber reclamation using different de-crosslinking agents

“…1 The Horikx equation normally used to characterise network structures undergoing oxidative degradation, devulcanization or recycling. The relative decrease in CLD when main chain scission occurs 22 and when only crosslink scission takes place during de-crosslinkingwhere si , sf , ϑi , ϑf,γi , and γf are sol fractions before and after de-crosslinking, CLD’s before and after de-crosslinking, and the average number of crosslinks per chain in the remaining insoluble rubber network before and after de-crosslinking, respectively. In this study, si and ϑi were measured as 0.07 and 281 mol/m3 (Table 1), respectively.…”

“…1 The Horikx equation normally used to characterise network structures undergoing oxidative degradation, devulcanization or recycling. The relative decrease in CLD when main chain scission occurs 22 1 À…”

“…However, the above-mentioned techniques have some advantages and also disadvantages. The de-crosslinking of the butyl rubber has already been done by the researchers using some of the mentioned techniques, i.e., Polvoy et al, 14 Karmanova, 15 Liliane et al, 16 Khavarnia et al, 1 Kuan Jiang et al, 17 Tao Zhang el al., 5 Vagizova et al, 18 and Feng et al 19,20 They reclaimed the sulphur (vulcanized) and peroxide-cured butyl rubber.…”

“…Zhang et al 5 studied a mechanical technique using a twin screw extruder. The radiation technique was used by Scagliusi 21 and Karmanova 22 with the help of their colleagues. As observed, the techniques used and de-crosslinking agents were limited, and no one used a thermo-chemical technique.…”