Phase Transition Induced by Small Molecules in Confined Copolymer Films

National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093

Received Date: August 16, 2007

Published Date: November 30, 2007

Abstract

We investigate the phase transition induced by small molecules in confined copolymer films by using density functional theory. It is found that the addition of small molecules can effectively promote the phase separation of copolymers. In a symmetric diblock copolymer film, the affinity and concentration of small molecules play an important role in the structure
transitions. The disordered--lamellar transitions, lamellar--lamellar transitions and the re-entrant transitions of the same structures are observed. Our results have potential applications in the fabrication of new functional materials.

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