Effect of nonsolvent selection on determined solubility parameter of chlorinated polypropylene by turbidimetric titration

The solubility parameters is one of foundational physical property parameter of polymer.Turbidimetric titrations is a usually used determination method for solubility parameters of polymer.The procedure of turbidimetric titrations is that put the polymer in its good solvent and titrate with a nonsolvent until appearance of turbidity.Suh et al.particularly studied the selection of good solvent,but the effect of nonsolvent has not reported up to now.In this paper,as an example,solubility parameter of chlorinated polypropylene is determined and studied.The result showed that the determined solubility parameter of polymer increased along with the increase of the solubility parameter of nonsolvent,which is higher than the solubility parameter of the good solvent.If the used nonsolvent is not selected,the determined solubility parameter is maintainable in the range of allowable of error of solubility parameter yet.