Abstract
The reclamation of crushed tire scrap of passenger cars was carried out by a mechano-chemical procedure with thiol and amine derivatives that act as an effective reclaiming agent.
From the swelling measurement of SBR vulcanizates in benzene solution containing a small amount of reclaiming agent, it was found that thiophenol, p-chlorothiophenol, n-butylamine and dimethylamine contributed considerably to the degradation of vulcanizates. Moreover, the thiol-amine complex was found to serve as a breaker of crosslinking which present in the form of di- and poly-sulfide linkages.
These reclaimed rubbers obtained by the mechano-chemical procedure with thiol and amine derivatives have low Mooney viscosity and these re-vulcanizates showed a excellent tensile properties. For an example, the re-vulcanizates having a tensile strength of 16.7MPa were obtained by the use of binary reagents such as thiophenol and n-butylamine or morpholine.
