Breakdown of time-temperature superposition in miscible polymer blends

Research output: Contribution to journalArticle

200 Citations (Scopus)

Abstract

The empirical principle of time-temperature superposition has been found to fail for a miscible blend of 20 weight% poly(ethylene oxide) in poly(methyl methacrylate). Oscillatory shear rheometry data is reported for this blend at four temperatures well above the glass transition temperature of the blend. The longest relaxation time of each component in the blend is obtained from the frequency dependence of the loss modulus. The temperature dependence of the longest relaxation time of each component in the blend is found to obey the empirical WLF equation of the pure component referenced to the glass transition temperature of the blend.

Original languageEnglish (US)
Pages (from-to)1275-1278
Number of pages4
JournalPolymer
Volume30
Issue number7
DOIs
StatePublished - Jan 1 1989

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Polymer blends
Relaxation time
Polymethyl Methacrylate
Polyethylene oxides
Polymethyl methacrylates
Temperature
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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author = "Colby, {Ralph H.}",
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Breakdown of time-temperature superposition in miscible polymer blends. / Colby, Ralph H.

In: Polymer, Vol. 30, No. 7, 01.01.1989, p. 1275-1278.

Research output: Contribution to journalArticle

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AB - The empirical principle of time-temperature superposition has been found to fail for a miscible blend of 20 weight% poly(ethylene oxide) in poly(methyl methacrylate). Oscillatory shear rheometry data is reported for this blend at four temperatures well above the glass transition temperature of the blend. The longest relaxation time of each component in the blend is obtained from the frequency dependence of the loss modulus. The temperature dependence of the longest relaxation time of each component in the blend is found to obey the empirical WLF equation of the pure component referenced to the glass transition temperature of the blend.

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