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Structural Parameters for Nanocylinder Microdomains of Polystyrene-polybutadiene- Polystyrene Triblock Copolymer and its Blends with Polystyrene Homopolymer

Author(s): Dong Sik Park, Erol Sancaktar.

Abstract:

We illustrate that the redistribution of a compatible homopolymer blended in a certain block copolymer results in a shift of phase boundaries and in the stabilization of well-ordered structures by using polystyrene (PS) homopolymer blended in polystyrenepolybutadiene- polystyrene triblock copolymer (SBS1102) as a model system. The addition of the homopolymer into the asymmetric triblock copolymer increases the periodic orientation normal to the substrate, enabling directed self-assembly of the block copolymers into arrays of highly oriented, high-aspect-ratio cylindrical nanostructures over large areas. Thus, we show that blending a homopolymer with well controlled molecular weight provides an effective ordering process for self-assembly of block copolymers.

Keywords: Block copolymer self-assembly, orientation transition of block copolymer nano-cylinders, polystyrene homopolymer blended in polystyrenepolybutadiene-polystyrene triblock copolymer, periodic orientation normal to the substrate, blend microdomain structural parameters

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Article Details

VOLUME: 8
ISSUE: 2
Year: 2012
Page: [244 - 248]
Pages: 5
DOI: 10.2174/157341312800167641
Price: $58