Self-assembly of star block copolymers by dynamic density functional theory

Physics – Chemical Physics

Scientific paper

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Block Copolymers, Landau-Ginzburg Equations, Polymer Blends, Self Assembly, Stellar Motions, Time Dependence, Two Dimensional Models, Macromolecular And Polymer Solutions, Polymer Melts, Swelling

Scientific paper

The dynamic mean-field density functional method, driven from the generalized time-dependent Ginzburg-Landau equation, was applied to the mesoscopic dynamics of the multi-arms star block copolymer melts in two-dimensional lattice model. The implicit Gaussian density functional expression of a multi-arms star block copolymer chain for the intrinsic chemical potentials was constructed for the first time. Extension of this calculation strategy to more complex systems, such as hyperbranched copolymer or dendrimer, should be straightforward. The original application of this method to 3-arms block copolymer melts in our present works led to some novel ordered microphase patterns, such as hexagonal (HEX) honeycomb lattice, core-shell HEX lattice, knitting pattern, etc. The observed core-shell HEX lattice ordered structure is qualitatively in agreement with the experiment of Thomas [et al.] [Macromolecules 31, 5272 (1998)].

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