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Anisotropic fluctuations in ordered copolymer phases

โœ Scribed by Chuck Yeung; An-Chang Shi; Jaan Noolandi; Rashmi C. Desai

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
572 KB
Volume
5
Category
Article
ISSN
1022-1344

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โœฆ Synopsis

Abstract

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.

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The properties of the response function and the uctuation dissipation relation in phase-ordering systems are discussed. These issues are shown to be highly nontrivial even in the relatively simple case of coarsening dynamics considered here. It is discussed how the connection between statics and dyn