Microphases of nematic diblock copolymers: Reentry and finite size effects
- 6 September 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (10) , 1557-1560
- https://doi.org/10.1103/physrevlett.71.1557
Abstract
We study microphase separation in melts of diblock copolymers consisting of a main chain liquid crystalline block and an isotropic block. In the nematic phase the nematic block is easily stretched due to the presence of hairpins. This effect dominates splay and thus favors spherical micelles and cylinders with a nematic cores. The phase diagram is thus qualitatively different from that of an isotropic diblock and shows multiply reentrant sequences. The mesophases of nematic-isotropic diblocks afford opportunities for studying finite size effects on the nematic transition.Keywords
This publication has 16 references indexed in Scilit:
- Observation of hairpin defects in a nematic main-chain polyesterPhysical Review Letters, 1993
- Monodisperse "rodcoil" copolymersMacromolecules, 1993
- Liquid Crystalline Polymers As Ising Chains: Stretching and SwellingEurophysics Letters, 1992
- Cylindrical micelles in rigid-flexible diblock copolymersMacromolecules, 1992
- Theory of directed polymersPhysical Review A, 1992
- Polymer BrushesScience, 1991
- Block Copolymer Thermodynamics: Theory and ExperimentAnnual Review of Physical Chemistry, 1990
- Vortex Entanglement in High-SuperconductorsPhysical Review Letters, 1988
- Giant dielectric response and hairpins in polymeric nematicsPhysical Review Letters, 1987
- Rod to coil transitions in nematic polymersJournal of Physics A: General Physics, 1985