THERMAL CHARACTERIZATION OF BLOCK COPOLYMER INTERFACES.
01 December 1989
A thermal technique to determine the volume fraction of interfacial material in microphase-separated block copolymers is described. By measuring the degree of enthalpy relaxation that results from annealing at a temperature between the glass transition temperatures of the blocks, the total content of interfacial material can be determined. The technique assumes that the interface can be modeled as discrete fractions with intermediate glass transition temperatures which contribute independently to the excess enthalpy observed in a differential scanning calorimetry experiment.