Characterization of two new stable block copolymer mesophases by synchrotron small-angle scattering
Max-Planck-Institut für Kolloid- und Grenzflächenforschung,
Kantstr. 55, D-14513 Teltow-Seehof, Germany
Accepted: 22 March 1998
Block copolymers made of polystyrene and fluorinated blocks represent a new class of polymers with a very strong incompatibility between the two blocks. They exhibit new stable block copolymer mesophases which are not considered in the phase diagrams of diblock copolymers in the strong and super-strong segregation regime. The solid-state structures of two polymers with different compositions are characterized by synchrotron small-angle X-ray scattering and transmission electron microscopy, thus proving the existence of a quadratically perforated layer phase and a 2D phase of sanidically degenerated cylinders.
PACS: 61.10.Eq – X-ray scattering (including small-angle scattering) / 61.82.Pv – Polymers, organic compounds
© EDP Sciences, 1998