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Anisotropic fluctuations in ordered copolymer phases
Author(s) -
Yeung Chuck,
Shi AnChang,
Noolandi Jaan,
Desai Rashmi C.
Publication year - 1996
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.1996.040050209
Subject(s) - lamellar structure , anisotropy , metastability , lamellar phase , materials science , phase (matter) , copolymer , random phase approximation , scattering , condensed matter physics , polymer , symmetry (geometry) , hexagonal phase , bending , physics , optics , composite material , geometry , quantum mechanics , mathematics
The random phase approximation is reformulated to investigate the anisotropic fluctuations about an ordered polymer phase. This very general method is applied to the lamellar phase of block copolymers. The calculated anisotropic scattering intensity captures the main features observed experimentally including the secondary peaks due to fluctuations with hexagonal symmetry. We also determined the limits of metastability of the lamellar phase as well as the bending and elastic moduli of the lamellae.