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Morphological Studies of Semicrystalline Poly(2, 6-dimethylphenylene oxide)
Macromolecules (1976)
  • William MacKnight, University of Massachusetts Amherst
  • W. Wenig
  • R. Hammel
  • F. E. Karasz
A sample of poly(2,6-dimethylphenylene oxide) (PPO) has been crystallized by exposure to 2-buta­none (MEK) vapor. This sample has been investigated by wide and small angle x-ray scattering (WAXS and SAXS), differential scanning calorimetry (DSC), and light-scattering techniques. The WAXS and DSC experi­ments reveal a maximum crystallinity of about 30%. The SAXS, analyzed according to the linear paracrystal model of Hosemann, indicates a high degree of order in the superlattice with an average crystal lamellar thickness of 38 A. Extensive peak broadening occurs in the W AXS curve arising from crystal lattice distortions or defects. These dis­tortions or defects most probably are a consequence of the removal of solvent molecules from the lattice during the drying process. The light-scattering studies show a rodlike morphology apparently made up of fibrous bundles. The exact nature of the structures responsible for the observed light-scattering patterns cannot be conclusively demon­strated. 
  • Morphological,
  • Semicrystalline,
  • Poly(2 6-dimethylphenylene oxide)
Publication Date
Citation Information
William MacKnight, W. Wenig, R. Hammel and F. E. Karasz. "Morphological Studies of Semicrystalline Poly(2, 6-dimethylphenylene oxide)" Macromolecules Vol. 9 (1976) p. 253 - 257
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