Monte Carlo Simulation of Effects of Homopolymer Chain Length on Interfacial Properties of A/AB/B Ternary Polymer Blends

We employed Monte Carlo simulation to investigate the effects of chain length of the homopolymer on the interfacial properties between two immiscible homopolymers. When the chain length of diblock copolymer is fixed at N-C = 20, as the chain length(N-H) of homopolymer increases from 10 to 60, the interface thickness increases significantly. The orientation parameter q of the diblock copolymer chain decreases with the increase of N-H from 10 to 40, but enlarges with the further increase of homopolymer chain length, which means that the stretching of diblock copolymer displays a non-monotonic dependence on the homopolymer chain length. When the diblock copolymer chain length is fixed as N-C = 60, as the chain length of homopolymer increases from N-H = 10 to 60, the interface thickness decreases and the diblock copolymer chain orientation parameter q decreases, indicating that the stretching of diblock chain is weakened.