Small-angle X-ray scattering from sulphonated polyurethane ionomers based on toluene diisocyanate

Y. Samuel Ding, Richard A. Register, Chang zheng Yang, Stuart L. Cooper

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49 Scopus citations


A series of sulphonated polyurethane ionomers based on poly(tetramethylene oxide), poly(propylene oxide), and polybutadiene (PTMO, PPO, and PBD) polyols was examined by small-angle X-ray scattering (SAXS). As the polyol molecular weight is increased, the ionic aggregate number density decreases and the aggregate size increases. PPO-based ionomers form smaller and more regularly spaced aggregates than do PTMO- or PBD-based ionomers. The limited data suggest that the aggregate size decreases with increasing valency. For PTMO-based materials neutralized with zinc and cadmium, increasing the temperature increased the fraction of ionic groups dissolved in the polymer matrix, especially for the zinc-neutralized sample. The degree of phase separation for these two samples paralleled the modulus-temperature trend.

Original languageEnglish (US)
Pages (from-to)1213-1220
Number of pages8
Issue number7
StatePublished - Jul 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


  • aggregate dissociation temperature
  • ionomer
  • morphology
  • polyurethane ionomer
  • small-angle X-ray scattering


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