Cross-linking reaction of segregated microdomains formed by diblock copolymer films

Polystyrene-block-poly(4-vinylpyridine) (PS-block-P4VP) (P4VP block, 36 mol %) was prepared by anionic polymerization. Three types of morphologies (sph ere, cylinder and lamella) were controlled by changing thr casting solvents . Subsequently, the cross-linking reaction of P4VP spherical, cylindrical o r lamellar microdomains was carried out with the vapor of 1,4-dibromobutane in the solid state. The morphologies and solution properties of the cross- linked products were studied by electron microscopy, small-angle X-ray scat tering and static and dynamic light scattering. (C) 2000 Elsevier Science L td. All rights reserved.