Broadband dielectric investigation of amorphous poly(methyl methacrylate)/poly(ethylene oxide) blends

Xing Jin, Shihai Zhang, James Patrick Runt

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

The segmental and local dynamics of amorphous blends of poly(methyl methacrylate) and polyethylene oxide) (PMMA/PEO) were investigated using dielectric relaxation spectroscopy. The derivative of the dielectric permittivity facilitates the observation of the cooperative segmental relaxation (α b) in blends with low PEO content, which is mostly masked in ∈″ spectra. For blends aged at room temperature, a DSC endotherm gradually develops near the expected PEO T m and shifts to higher temperatures with increasing aging time. However, X-ray diffraction from PEO crystals is not observed, indicating that the glassy blends undergo physical aging at room temperature. A relaxation appears in the blends between the PMMA and PEO local relaxations, which we propose is associated with regions of PEO partial order.

Original languageEnglish (US)
Pages (from-to)8110-8115
Number of pages6
JournalMacromolecules
Volume37
Issue number21
DOIs
StatePublished - Oct 19 2004

Fingerprint

Polymethyl Methacrylate
Polyethylene oxides
Polymethyl methacrylates
Aging of materials
Dielectric relaxation
Temperature
Permittivity
Spectroscopy
Derivatives
X ray diffraction
Crystals

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Jin, Xing ; Zhang, Shihai ; Runt, James Patrick. / Broadband dielectric investigation of amorphous poly(methyl methacrylate)/poly(ethylene oxide) blends. In: Macromolecules. 2004 ; Vol. 37, No. 21. pp. 8110-8115.
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Broadband dielectric investigation of amorphous poly(methyl methacrylate)/poly(ethylene oxide) blends. / Jin, Xing; Zhang, Shihai; Runt, James Patrick.

In: Macromolecules, Vol. 37, No. 21, 19.10.2004, p. 8110-8115.

Research output: Contribution to journalArticle

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