POLYMERIZATION OF 2-DIBUTYLAMINO-1,3,5-TRIAZINE-4,6-DITHIOL ON WIRE DURING FRICTION PROCESS

2-Dibutylamino-1,3,5-triazine-4,6-dithiol (DB) and a mixture of DB and triallylisocyanurate (TAIC) were used as a lubricant during steel wir e drawing due to a dry process. DB gave a polymer film with 180 nm in thickness to wire surfaces during the wire drawing. The polymer film h ad a disulfide structure on the backbone and contained a small amount of DB monomer and olygomer. Molecular weight and polymer weight increa sed with the drawing rate. The mixture of DB and TAIC gave mainly a th ree-dimensional polymer film with 225 nm in thickness to wire surfaces during drawing. The polymer film insoluble in THF had mono and disulf ide structures and contained a small amount of linear polymer, DB, and TAIC. Such tribological polymerizations are estimated as follows: DB produces dithiyl radicals on a nascent surface formed during drawing a nd in the presence of oxygen and heat. The dithiyl radicals were polym erized by coupling with each other to give disulfide bonds or added to allyl groups in TAIC to give monosulfide bonds. It is concluded that this technique should be possible to use for unifying metal processing and surface treatment. (C) 1995 John Wiley & Sons, Inc.