Abstract
Decalin, a hydrocarbon industrial solvent was used for the recovery of Styrene- Butadiene Rubber (SBR) from grind scrap truck tires using chemical dissolving method. The applied technique is easy, simple and depends on available materials. The method depends mainly on steeping the scrap tires grind into decalin at 50?C for one month. Then the process was followed by boiling of the formed thick black solution (198°C) for two hours. The formed elastic rubber material will be reclaimed by precipitation in methanol. The recovered rubber was characterized using FTIR spectroscopy and XRD analyses. The pattern of the recovered material shows broad maxima of SBR with the absence of XRD peaks of carbon black and almost all the other tire manufacturing additives. The thermal characteristics of the reclaimed rubber have been investigated by TGA, DTG and DSC analyses and were found to be close to those of thermal properties of SBR polymer. The SEM image has shown non-crystalline morphological surface of the recovered rubber with cohesive elastomeric properties.
Highlights
The world consumes 4.5 million tons of tires, in addition to billions of tires of different types are to be disposed of in the USA
Most recycling processes of the scrap tires depends on either incineration for energy reclaims; pyrolysis to oil for an alternative fuel for diesel engines; crumbed the tires for flooring indoor arena, or the tires were recycled by shredding and filled cement composition for certain infrastructural applications
The final white recovered rubber which was extracted from scrap tires using decalin solvent was characterized with different sophisticated analysis in order to ascertain its composition
Summary
The world consumes 4.5 million tons of tires, in addition to billions of tires of different types are to be disposed of in the USA. Decalin a bicyclic saturated hydrocarbon was used in the present work as solvent for reclaiming the rubber from scrap tires. SEM images were used to see any differences between pristine tire and its recovered rubber.
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