Abstract
A new morphological parameter, ‘CoContinuity’, has been developed and implemented for quantitative measurement of morphology in cocontinuous blends of polymers. The basis of the CoContinuity is the extent to which the phases of a polymer blend mutually surround each other. A secondary parameter, ‘CoContinuity Balance’, is also presented to describe quantitatively the relative contribution of each phase to the CoContinuity. Both of these functions are dimensionless and scale-invariant, thus allowing objective comparisons of dissimilar systems. An example is given where the functions faithfully describe the evolution of a polycarbonate/poly(styrene- co-acrylonitrile) (PC/SAN) blend of varying phase ratio as the system progresses from discrete domains of the SAN phase in a matrix of PC, through a cocontinuous morphology of SAN and PC, and finally ends up as a mixture of discrete domains of PC in a matrix of SAN.
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