Influence of Chlorinating Solution Concentration on The Interactions Produced Between Chlorinated Thermoplastic Rubber And Polyurethane Adhesive At The Interface

摘要

Chlorination of a thermoplastic styrene-butadiene-styrene rubber (SO) with different amounts of trichloroisocyanuric acid (TCI) solutions in ethyl acetate improved its adhesion to polyurethane adhesives.A strong interaction of the PU (polyurethane) adhesive and the chlorinated SO rubber chains is produced at the interface. The increae in the concentration of TCi from 0.5 wt up to 2-7 wt% resulted in the deposition fo crystallites of unreated TCI on the rubber surface. The remaining TCI on the rubber surface migrates through the PU adhesive producing some chlorination of the PU chains .The failure of the joint id locate in this interface composed of both chlorinated SO rubber and partially-chlorinated PU adhesive