title: 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.
abstract: The 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.
authors.affiliation: Department of Chemistry, University of Reading, Reading RG6 6AD, UK. I.W.Hamley@reading.ac.uk.
authors.forename: Ian W
authors.initials: IW
authors.lastname: Hamley
authors.forename: Ben M D
authors.initials: BM
authors.lastname: O'Driscoll
authors.forename: Gudrun
authors.initials: G
authors.lastname: Lotze
authors.forename: Claire
authors.initials: C
authors.lastname: Moulton
authors.forename: Jürgen
authors.initials: J
authors.lastname: Allgaier
authors.forename: Henrich
authors.initials: H
authors.lastname: Frielinghaus