Experimental study of polymer interactions in a bad solvent

R. Perzynski , M. Delsanti , M. Adam

The interactions between polymer chains in a bad solvent (polystyrene-cyclohexane at temperatures lower than 35 °C) was studied using light scattering intensity measurements. The results obtained in dilute solutions show that the demixing concentration CD is related to the second virial coefficient A 2 of the osmotic pressure. Using the reduced variables predicted by mean-field or scaling theories the demixion curves are dependent on M w, the molecular weight. Empirically, it is found that CD/C c and A2/Ac2 are only functions of Tc - T/Tc × M0.31w . Cc and Ac2 are the critical concentration and the second virial coefficient at the critical temperature Tc.

Mots clés: light scattering; osmosis; polymer solutions; segregation

Domaines: Articles anciens

R. Perzynski, M. Delsanti, M. Adam. Experimental study of polymer interactions in a bad solvent. Journal de Physique, 1987, 48 (1), pp.115-124. ⟨10.1051/jphys:01987004801011500⟩. ⟨jpa-00210411⟩