The effect of uniaxial stretching on the surface composition of blends of poly(dimethyl siloxane/poly(sulfone) block copolymers in polychloroprene is studied using X-Ray photoelectron spectroscopy. The surface of the initial (unstretched) blends was covered by copolymer overlayer. The stretching lead to a substantial drop of the copolymer surface segregation. The comparison of the experimental data with different models of deformation leads to the conclusion that copolymer overlayer with short segment of poli(sulfone) follows the deformation of CR matrix on stretching; however an overlayer with long poli(sulfone) segment is stretched with delay.
Surface; XPS; polymer blends; deformation
