Effects of A-B block copolymer additives on interfacial tension of A/B polymer blends near the critical temperature: Comparison of mean-field calculations with experiments

Takuhei Nose, Katsuhiro Inomata, Hiroshi Morita, Toshihiro Kawakatsu, Masao Doi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A simple square-gradient theory (SGT) for the interfacial tension of homopolymer-A/homopolymer-B blends with A-B diblock copolymer additives near the critical solution temperature, Tc, has been proposed to describe the experimental finding that, as the temperature changes away from Tc, the interfacial tension γ increases, and then decreases, exhibiting a maximum. Dynamic mean-field calculations (DMF) of a self-consistent field treatment are also performed to describe it and are compared with those of the proposed SGT. Both of SGT and DMF reasonably describe the γ-maximum behavior and the additive-concentration dependence of the location of γ-maximum in γ-T relation. Agreements of SGT with DMF results are quite satisfactory, although SGT, in general, gives thinner adsorbed layers of block copolymers than those evaluated by DMF.

Original languageEnglish
Pages (from-to)1548-1556
Number of pages9
JournalMacromolecular Chemistry and Physics
Volume202
Issue number9
DOIs
Publication statusPublished - 2001 Jul 6
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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