Microstructure of polyurethane ionomers derivatized with dodecylamine and polyethylene oxide in the hard segment
Article first published online: 10 MAR 2003
Copyright © 1994 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 52, Issue 4, pages 515–523, 25 April 1994
How to Cite
Santerre, J. P. and Brash, J. L. (1994), Microstructure of polyurethane ionomers derivatized with dodecylamine and polyethylene oxide in the hard segment. J. Appl. Polym. Sci., 52: 515–523. doi: 10.1002/app.1994.070520406
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 20 SEP 1993
- Manuscript Received: 29 MAR 1993
Segmented polyether-polyurethanes containing sulfonate groups in the hard segment were modified by the grafting of polyethylene oxide and C12 hydrocarbon chains. The grafts were attached via the sulfonate groups. The physical properties of the materials, including stress–strain behavior, thermal behavior, and water uptake were studied. Grafting was found to alter material behavior significantly. Both the alkyl and polyethylene oxide grafts appear to alter the packing of the hard segments in microdomains because the grafted materials, in contrast to their sulfonated precursor, do not exhibit a melting transition. However, the polyethylene oxide chains appear to interact with the hard segments, probably through hydrogen bonding. For the C12 grafted materials, differential scanning calorimetry showed that a third microphase, consisting largely of C12 chains, may be formed by annealing. Stress–strain and water uptake data support these interpretations. The grafted materials were found to absorb more water than the sulfonated precursor. Most of the water taken up by the C12 material appears to be bulk water whereas for the PEO materials the absorbed water behaves as if it is bound. © 1994 John Wiley & Sons, Inc.