Highly asymmetric phase diagram of a poly(1,2-octylene oxide)-poly(ethylene oxide) diblock copolymer system comprising a brush-like poly(1,2-octylene oxide) blockTools  Hamley, I., O'Driscoll, B., Lotze, G., Moulton, C., Allgaier, J. and Frielinghaus, H. (2009) Highly asymmetric phase diagram of a poly(1,2-octylene oxide)-poly(ethylene oxide) diblock copolymer system comprising a brush-like poly(1,2-octylene oxide) block. Macromolecular Rapid Communications, 30 (24). pp. 2141-2146. ISSN 1521-3927 Full text not archived in this repository. To link to this article DOI: 10.1002/marc.200900474 Abstract/SummaryThe phase diagram of a series of poly(1,2-octylene oxide)-poly(ethylene oxide) (POO-PEO) diblock copolymers is determined by small-angle X-ray scattering. The Flory-Huggins interaction parameter was measured by small-angle neutron scattering. The phase diagram is highly asymmetric due to large conformational asymmetry that results from the hexyl side chains in the POO block. Non-lamellar phases (hexagonal and gyroid) are observed near f(PEO) = 0.5, and the lamellar phase is observed for f(PEO) >= 0.5.
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