Molecular weight distributions from turbidimetric titrations

The molecular weight distribution of the products of the reaction between polystyryl potassium and 1,3,5 tri[bromomethyl] benzene was determined by turbidimetric technique. For the system chloroform–ethanol–polystyrene (anionic) the solubility S of a species of molecular weight M at a volume fraction γ of nonsolvent is given by the expression