STATIC SCATTERING FROM MIXTURES OF WEAKLY CHARGED POLYMERS

The static scattering properties of mixtures of weakly charged polymers are investigated. The partial structure factors are calculated using the general matrix equation S-1(q) = S0-1(q) + U(q), where S(q) and S0(q) are the total and bare structure matrices, U(q) is the interaction matrix, and q is the magnitude of the wave vector. U(q) is modeled as a sum of the classical excluded volume matrix and the electrostatic interaction matrix. The case of ternary mixtures of two polymers and a solvent is considered. Mixtures of charged and neutral polymers and mixtures of polymers having charges of the same or opposite signs are also investigated. The variations with the wave vector q of various structure factors are examined in some detail in various conditions of charge distribution.