Phase behavior of reversibly associating star copolymer-like polymer blends

June Huh, Seung Hyun Kim, Won Ho Jo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We theoretically consider blends of two monodisperse one-end-functionalized homopolymers (denoted by A and B) capable of forming clusters between functional groups (stickers) using weak segregation theory. In this model system resulting molecular architectures via clustering resemble star copolymers having many A- and B- arms. Minimizing the total free energy with respect the cluster distribution, the equilibrium distribution of clusters is obtained and used for RPA (Random Phase Approximation) equations as input. For the case that polymers are functionalized by only one kind of sticker, the phase diagrams show that the associations promote the macrophase separation. When there is strong affinity between stickers belonging to the different polymer species, on the other hand, the phase diagram show a suppression of the macrophase separation at the range of high temperature regime, as well as the phase coexistence between a disordered and a mesoscopic phase at the relatively lower temperatures.

Original languageEnglish
Pages (from-to)18-23
Number of pages6
JournalMacromolecular Research
Volume10
Issue number1
DOIs
Publication statusPublished - 2002 Feb

Keywords

  • Associating polymer blends
  • Macrophase separation
  • Microphase separation
  • Week segregation theory

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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