Shear flow effect on phase behavior and morphology in polymer blends

Toshiaki Ougizawa, Samy Madbouly, Takashi Inoue

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of simple shear flow on the phase behavior and morphology was investigated for both polystyrene/poly(vinyl methyl ether) (PS/PVME) and poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) (PMMA/SAN-29.5) blends, which have LCST (lower critical solution temperature)-type phase diagram. The measurements were carried out using a special shear apparatus of two parallel glass plates type. The PS/PVME blends showed shear-induced demixing and shear-induced mixing at low and high shear rate values, respectively. In addition, the rotation speed and the sample thickness were found to have a pronounced effect on the phase behavior under shear flow. On the other hand, PMMA/SAN blend showed only shear-induced mixing and the magnitudes of the elevation of the cloud points were found to be composition and molecular weight dependent. The morphology of the PMMA/SAN=75/25 blend indicated that shear-induced mixing occurred at a critical shear rate value, below which the two phases were highly oriented and elongated in the flow direction.

Original languageEnglish (US)
Pages (from-to)69-74
Number of pages6
JournalMacromolecular Symposia
Volume149
DOIs
StatePublished - Jan 1 2000

Fingerprint

polymer blends
Polymethyl Methacrylate
Polymer blends
Phase behavior
Shear flow
shear flow
shear
Shear deformation
Ethers
Polystyrenes
polystyrene
Acrylonitrile
Polymethyl methacrylates
Phase diagrams
Styrene
Molecular weight
ethers
Glass
Chemical analysis
acrylonitriles

All Science Journal Classification (ASJC) codes

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

Cite this

Ougizawa, Toshiaki ; Madbouly, Samy ; Inoue, Takashi. / Shear flow effect on phase behavior and morphology in polymer blends. In: Macromolecular Symposia. 2000 ; Vol. 149. pp. 69-74.
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Shear flow effect on phase behavior and morphology in polymer blends. / Ougizawa, Toshiaki; Madbouly, Samy; Inoue, Takashi.

In: Macromolecular Symposia, Vol. 149, 01.01.2000, p. 69-74.

Research output: Contribution to journalArticle

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