Morphological control of helical structures of an ABC-type triblock terpolymer by distribution control of a blending homopolymer in a block copolymer microdomain

Takeshi Higuchi, Hidekazu Sugimori, Xi Jiang, Song Hong, Kazuyuki Matsunaga, Takeshi Kaneko, Volker Abetz, Atsushi Takahara, Hiroshi Jinnai

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The control of microphase-separated structures in a poly(styrene-block- butadiene-block-methyl methacrylate) (SBM) was investigated in three dimensions by transmission electron microtomography. Neat SBM self-assembled into a double-helical structure of polybutadiene (PB) domains around hexagonally packed core polystyrene (PS) cylinders in a poly(methyl methacrylate) matrix. When PS homopolymer with a lower molecular weight than that of the PS block in SBM was added to the SBM, the PB domains transformed from double-helical structures to spherical domains, while maintaining the helical trajectories. In contrast, adding a higher molecular weight PS to the SBM changed the helical structures from double- to triple-stranded structures and even to four-stranded structures. The helical structures of the PB domains were strongly affected by the distribution of the blended polystyrenes in the core cylindrical PS domains.

Original languageEnglish
Pages (from-to)6991-6997
Number of pages7
JournalMacromolecules
Volume46
Issue number17
DOIs
Publication statusPublished - Sep 10 2013

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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