Various phase behaviors of weakly interacting binary block copolymer blends

Hyungju Ahn, Yonghoon Lee, Hoyeon Lee, Young Soo Han, Baek Seok Seong, Du Yeol Ryu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We investigated the phase behaviors of block copolymer (BCP) blends composed of the weakly interacting (with no specific interaction) polystyrene-b-poly(n-butyl methacrylate) (PS-b-PnBMA) and polystyrene-b-poly(n- hexyl methacrylate) (PS-b-PnHMA), using small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and depolarized light scattering (DPLS). A miscible phase between the PnBMA and PnHMA blocks in the BCP blends allows the various composition-dependent phase behaviors, which display a lower disorder-to-order transition (LDOT) to an order-to-disorder transition (ODT) on heating as the blend composition varies from PS-b-PnBMA to PS-b-PnHMA. In between these two extremes, intriguingly, the miscible PS-b-PnBMA/PS-b-PnHMA blends display a closed-loop phase transition consisting of a LDOT and an upper order-to-disorder transition (UODT).

Original languageEnglish
Pages (from-to)4454-4461
Number of pages8
JournalMacromolecules
Volume46
Issue number11
DOIs
Publication statusPublished - 2013 Jun 11

All Science Journal Classification (ASJC) codes

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

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