Phase Behavior of Poly(4-tert-butylstyrene-stat-4-tertbutoxystyrene)/ polyisoprene blends with competitive interactions

Siti Arah Abdul Rahman, Daisuke Kawaguchi, Daisaku Ito, Atsushi Takano, Yushu Matsushita

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The phase behavior of statistical copolymers composed of (4-tert-butylstyrene) (B) and (4-tert-butoxystyrene) (O), abbreviated as s-BO, with polyisoprene (I) was investigated by optical microscopic (OM) observation and small-angle neutron scattering (SANS) measurements. It has been known that B/I blend shows lower critical solution temperature (LCST) type phase diagram, while O/I blend has upper critical solution temperature (UCST) type one. Several blends of s-BOs having mol fraction of B, mB, comparable to 0.50, with I showed both UCST and LCST type phase diagram. Furthermore, UCST type phase behavior was observed for blends having small mB, while LCST type one was for that of large mB at all used temperatures. Hence, the phase behavior of s-BO/I blend can be understood as a result of the competition of two interactions having opposite temperature dependence.

Original languageEnglish
Pages (from-to)2272-2280
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume47
Issue number22
DOIs
Publication statusPublished - Nov 15 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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