Abstract
Morphology diagrams for A2B copolymer melts are constructed using real-space
self-consistent field theory (SCFT). In particular, the effect of architectural asymmetry on the
morphology diagram is studied. It is shown that asymmetry in the lengths of A arms in the A2B
copolymer melts aids in the microphase separation. As a result, the disorder-order transition
boundaries for the A2B copolymer melts are shown to shift downward in terms of N, and
N being the Flory’s chi parameter and the total number of the Kuhn segments,respectively, in
comparison with the A2B copolymers containing symmetric A arms. Furthermore, perforated
lamellar (PL) and a micelle-like (M) microphase segregated morphologies are found to compete
with the classical morphologies namely, lamellar, cylinders, spheres and gyroid. The PL
morphology is found to be stable for A2B copolymers containing asymmetric A arms and M is
found to be metastable for the parameter range explored in this work.
