Fiber adhesion of poly(phenylenesulfide sulfones) as affected by their molecular mass

For the adhesional joints of poly(phenylenesulfide sulfone) with a steel wi re 150 mu m in diameter, the strength of the polymer-fiber interface as a f unction of the molecular mass of a polymer adhesive was studied. It was sho wn that, at a constant temperature of polymer deformation (320 degrees C), the dependence of adhesive strength on the duration pf the adhesion joint f ormation is described by a curve with a maximum, The values of adhesive str ength, corresponding to maxima on the plots of adhesive strength versus the duration of the adhesion adhesion joint formation, depend on the molecular mass of the polymer and increase from 27 to 37 MPa as molecular mass grows from 13.8 x 10(3) to 40x10(3). It is suggested that the observed effect is related to the different mode of packing of polymer chains with various le ngth in near the surface layers.