Article in Physical Review Letters on the micro-emulsion channel in block-copolymer homopolymer blends

Centre for Computational Physics

Our paper “Instability of the Microemulsion Channel in Block Copolymer-Homopolymer Blends” has now been published in the prestigious journal Physical Review Letters and is available here. The work is a collaboration between the University of Waterloo in Canada and Lincoln.

Instability of the Microemulsion Channel in Block Copolymer-Homopolymer Blends

Bart Vorselaars, Russell K. W. Spencer, and Mark W. Matsen Phys. Rev. Lett. 125, 117801 – Published 10 September 2020

Phase diagram of block-copolymer homopolymer blends. In the top figure the A+B+LAM and A+B+DIS was missing. Bottom figure shows the revised phase diagram after our study.

Abstract:Field theoretic simulations are used to predict the equilibrium phase diagram of symmetric blends of AB diblock copolymer with A- and B-type homopolymers. Experiments generally observe a channel of bicontinuous microemulsion (BμE) separating the ordered lamellar (LAM) phase from coexisting homopolymer-rich (A+B) phases. However, our simulations find that the channel is…

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