| Abstrakt: |
In the present work we consider the dynamics of freely translating and rotating diblock (A−B), Gaussian copolymers, in dilute solutions. Using the previously developed multiple scattering technique [J. Chem. Phys. 1978, 69, 2657, 2088; 1979, 70, 5875 (refs 1−3)]&sbd;applied to the study of suspensions of spheres and polymers&sbd;we have computed the diffusion and the friction coefficients DAB and ζAB, respectively, and the change δηAB in the viscosity of the solution as functions of x = NA/N and t = lB/lA, where NA and N are the number of segments of the A block and of the whole copolymer, respectively, and lA and lB are the Kuhn lengths of the A and B blocks. Specific regimes that maximize the difference between the diffusion constants of copolymers with distinct t values, which lead to increasing the efficiency of separation processes, have been identified. |
