Morphology of ABC Triblock Copolymers

We present results from theoretical calculations of the morphological phase diagrams for ABC triblock copolymers in the strong segregation limit. The chain conformation free energy is approximated following an approach proposed by Ohta and Kawasaki. Our study focuses on two unique features of the ABC triblock copolymers, namely, the dependence of the morphology on the sequence of the triblock chain and the relative strength of the various interaction parameters. Our results compare favorably with experimental observations. In addition, we predict the existence of some new structures that have yet to be observed experimentally.