AN INVESTIGATION OF THE ADHESION OF SULFU R-CONTAINING POLYARYLENES

The sheer strength of the adhesive joints tau of polyphenylenesulfide and polyphenylenesulfidesulfone with glass fiber and steel wire was me asured in a temperature range from 20 to 400-degrees-C. A method for s ample preparation was developed and optimal time-temperature condition s for the formation of the adhesive joints were determined. The streng th of the adhesive joint depends largely on the nature of the substrat e: for polyphenylenesulfidesulfone, which contains polar units in its backbone, tau is much higher than that for polyphenylenesulfide becaus e the strength of adhesive joints with steel wire is higher than that of adhesive joints with glass fiber. A specific feature of the systems under investigation is that there is no significant decrease in the j oint strength in the region of polymer glass transition. Therefore, al though the adhesive strength of the polymers is rather low at room tem perature, it decreases more slowly than for thermoplastic and thermose t polymers. As a result, these polymers are well-suited for use at tem peratures from 250 to 300-degrees-C.