trolytes

ii A self-consistent field theory is developed for weakly charged polymeric systems composed of charged-neutral diblock copolymers and homopolymers. This generic model can be used to describe the phase behavior of a number of different charged polymeric systems, including charged polymer/homopolymer blends and ionic liq-uid/homopolymer mixtures. It is found that the miscibility of the system is in-creased by the increase of the charge fraction and the anion volume. Random phase approximation has also been used to calculate the spinodal lines for poly-electrolyte/homopolymer blends and polyelectrolyte solutions. Both systems exhibit micro- and macro- phase separated regions. It is also shown that an increase of the charge fraction stabilizes the homogeneous phase over the inhomogeneous ones and a decrease of the Bjerrum length stabilizes the microphase separated state over the macrophase separated state. Finally, the reciprocal-space method is used to solve the self-consistent field equations for the polyelectrolyte/homopolymer blends. Ful