Interfacial structures of block and graft copolymers with lamellar microphase-separated structures

Naoya Torikai, Yushu Matsushita, Sean Langridge, David Bucknall, Jeff Penfold, Masayasu Takeda

Research output: Contribution to journalConference article

13 Citations (Scopus)

Abstract

Chain conformations of A-polymers of BAB two-component triblock and ABB graft copolymers, composed of polystyrene (= A) and poly(2-vinylpyridine) (= B), with lamellar microphase-separated structures were investigated by small-angle neutron scattering (SANS), and interfacial thicknesses of AB diblock and BAB triblock copolymers were compared by using neutron reflectivity (NR). The middle A-block of BAB triblock copolymer has preferentially `loop' conformation when the volume fraction, φA, of A-chain is high above 0.5, while it does preferentially `bridge' conformation when φA is low around 0.3. A-graft chain of ABB copolymer has slightly larger dimension along the direction parallel to lamellar interface than A-chain of AB diblock copolymer. The interfacial thickness of BAB triblock copolymer is almost constant irrespective of φA, and comparable with that of AB diblock copolymer.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalPhysica B: Condensed Matter
Volume283
Issue number1-3
DOIs
Publication statusPublished - Jun 2000
Event6th International Conference on Surface X-ray and Neutron Scattering 1999 - Noordwijkerhout, Neth
Duration: 12 Sep 199917 Sep 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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