No abstract

Samples of ring and open chain polystyrene in dilute perdeuterated toluene solution were measured by small angle neutron scattering up to a value of the scattering vector Q = 2 nm-' . The molar masses 12000 M/(g/mol) I 22000, the mean square radii of gyration(R2) and the second virial coefficients A, of the samples were determined. The results are compared to theories which describe the dependencies ( R 2 ) = f(M) and A, = f(M) for both cyclic and linear chain molecules. A qualitative agreement between theory and experiment is obtained. a) Present address: Degussa AG, Zweigniederlassung Wolfgang, Postfach 1345, D-6450 b, Present address: Bayer AG, D-4047 Dormagen.Hanau.

No abstract