AbstractPolypropylene having high isotacticity was fractionated by the rising temperature method. This method was then compared with the solvent gradient method through the characterization of fractions. It was found that the elution behavior in the rising temperature method was explainable by the equation of equilibrium between the polymer in dilute solution and the solid state polymer on the support, assuming that the heat of fusion and transition points for the deposited polymer were variable with polymer species.
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