Microphase separation morphology in multiblock copolymer melts obtained from Monte Carlo simulations

A lattice polymer simulation method called diagonal bond method is discusse d: Why does the method enable us to simulate complex morphologies? We demon strate cell crystalline structures for ABCD star block copolymers, and cyli ndrical structures for asymmetric ABC star block copolymers. A common geome tric constraint for these starblock copolymers is explicitly given. For ABC triblock copolymers, we have obtained four structures: gyroid, double-diam ond, lamellar, and cylindrical structures. For all structures in this paper pictorial presentation is given.