Phase Behavior of Binary Blend Consisting of Asymmetric Polystyrene-block-poly(2-vinylpyridine) Copolymer and Asymmetric Deuterated Polystyrene-block-poly(4-hydroxystyrene) Copolymer Having Hydrogen Bonding

We investigated the phase behavior of a binary blend of asymmetric polystyrene-block-poly(2-vinylpyridine) copolymer (PS-b-P2VP) and deuterated polystyrene-block-polyhydroxystyrene copolymer (dPS-b-PHS) blends. The blend showed highly asymmetric lamellar microdomains. To explain the unexpected results, we study, via small angle X-ray scattering (SAXS) and neutron reflectivity (NR), the exact location of shorter dPS block in the mixture near the interface of the microdomains.