'Adhesion Between Dissimilar Elastomers:II.Effects of Bonding Temperature and Brominated Resin'

摘要

Initial results on the adhesion of crosslinkable compounds of elastomers based on brominated poly(isobutylene-co-4-methylstyrene) (BIMS) to crosslinkable compounds of diene elastomers,such as isoprene rubber (IR) or butadiene rubber (BR),were discussed previously.Effects of BIMS composition (Fig.1),carbon black,and MBTS were described.As an on-going effort,we have studied the effects of bonding temperature and brominated resin on the adhesion between these two dismiliar elastomers,BIMS to IR or BR.The strength of adheesion,represented by the work of detachment G_a,was measured using the T-peel geometry at various test temperatures and separation speeds.Time-of-flight secondary ion mass spectroscopy (ToF-SIMS) was utilized to determine the loci of adhesion.Although a zinc octoate curable BIMS compounds shows interfacial co-cure when bonded to a sulfur/ZnO/MBTS curable diene elastomer compound at 140 deg C,interfacial co-cure does not occur when the bonding temperature is raised to 180 deg C.On the other hand,if the sulfur in the diene elastomer compound is replaced by a brominated reisn,interfacial co-cure occurs between BIMS and diene elastomer when the bonding temperature is 140,160 or 180 deg C.