NEUTRON REFLECTION STUDIES OF INTERFACES BETWEEN PARTIALLY MISCIBLE AND COMPATIBILISED IMMISCILBLE POLYMERS

Neutron reflection data are presented for two systems of polymer inter faces. In the first system, two partially miscible pure polymers form a bilayer and are annealed. The shape of the broadened interface forme d between them at short times is analysed. In the second example a tri layer of a diblock copolymer with two immiscible polymers is annealed and the shape of the copolymer layer which forms at the homopolymer in terface is analysed. In both cases 'best-guess' profiles are subjected to Bayesian analysis and it is shown how this can give more confidenc e in the profiles extracted from neutron reflection data.