The Flory−Huggins Interaction Parameter in Blends of Polystyrene and Poly(p-Methylstyrene) by Small-Angle Neutron Scattering

Blends of polystyrene and poly(p-methylstyrene) (PPMS) were studied by small-angle neutron scattering. Doubling the molecular weight of the PPMS component had no effect on the Flory-Huggins interaction parameter, X, as determined from the scattering measurements. The temperature dependence of X is presented also.