Study on The Concentration Effects in GPC 4. A New Method for Determination of Second Virial Coefficients from the Concentration Effects

In this paper a new relation between the second virial coefficients A₂, \left(\barM_*\right) and (dV_es/dC)_C→0=K_s was derived from proposed model theory of concentration effects for mono and polydispersed polymers. They are given in equations （13） and （14）. Basing these equations a new method for determination of second virial coefficients from the combination of (dV_es/dc)_c→0, \left(\barM_*\right) and K_H measurements was proposed. The concentration effects in GPC for mono and polydispersed polystyrene with molecular weight range from 10⁴ to 10⁶ were studied. The values of A₂ for these polystyrene in good and theta solvents were determind by proposed method, Results show that their values of A₂ are in agreement with the other obtained by light scatting, and the proposed method is useful for determinating the A₂ of polymers with molecular weight range from 10⁴ to 10⁶.