Effect of cation local structure on the physical properties of sulphonated polyurethane ionomers based on toluene diisocyanate

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

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

A series of sulphonated polyurethane ionomers based on poly(tetramethylene oxide) of molecular weight 1000, neutralized with Ca2+, Ni2+, Zn2+, Cd2+, Cs+ and Eu3+ were examined by extended X-ray absorption fine structure (EXAFS) spectroscopy. The degree of local order shown by EXAFS correlates inversely with the strain at which stress crystallization begins, indicating that the cohesiveness of the ionic aggregates controls the large-strain behaviour of the materials by suppressing ion-hopping. Upon hydration, the materials lose their mechanical strength. The local structure in the Ca2+-neutralized material is insensitive to hydration, while that in the Ni2+-neutralized material changes dramatically.

Original languageEnglish (US)
Pages (from-to)1221-1226
Number of pages6
JournalPolymer
Volume30
Issue number7
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

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