Phase Behavior of Binary Blend Consisting of Asymmetric Polystyrene-block-poly(2-vinylpyridine) Copolymer and Asymmetric Deuterated Polystyrene-block-poly(4-hydroxystyrene) Copolymer

by Jongheon Kwak , Sung Hyun Han , Hong Chul Moon , and Jin Kon Kim, Jaseung Koo, Jeong-Soo Lee, Victor Pryamitsyn and Venkat Ganesan

Macromolecules, 2015, 48 (4), pp 1262–1266

Block copolymers have been extensively investigated due to their various self-assembled nanoscale structures such as lamellae, cylinders, gyroids, and spheres depending on the volume fraction (f) of one block, the degree of polymerization (N), and the Flory–Huggins segmental interaction parameter (χ).(1-4) For easy tuning of nanostructures and finding unusual microdomains that cannot be obtained by neat block copolymers, many research groups have employed binary blends of two block copolymers: for instance, (A–B)1/(A–B)2 or (A–B)/(A–C) and (A–B)/(C–D).(5-16) A blending of two or more block copolymers is also an attractive way for adjusting physical properties and expanding the phase boundary of conventional block copolymers.(17-23)

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