Temperature-dependent dynamic mechanical analysis-Fourier transform infrared study of a poly(ester urethane) copolymer


Journal Article

Variable temperature dynamic mechanical analysis (DMA) and Fourier transform infrared spectroscopy (FTIR) have been combined and applied to rheooptical (DMA-FTIR) studies of thin films of a poly(ester urethane). In this study, dynamic infrared linear dichroism (DIRLD) measurements have been carried out at 25, -5, and -30 °C with the step-scan FTIR modulation/demodulation technique. The changes in both the in-phase and quadrature spectra as a function of temperature reveal different responses for the various functional groups as a function of temperature. In particular, as the temperature is lowered, the dynamic responses of structurally different carbonyl groups (hydrogen-bonded, free, urethane, ester) are clearly differentiated. The changes in dynamic response are related to changes in the hydrogen bonding interactions in this polymer as well as to distinction between different molecular-level microenvironments.

Full Text

Duke Authors

Cited Authors

  • Wang, H; Aubuchon, SR; Thompson, DG; Osborn, JC; Marsh, AL; Nichols, WR; Schoonover, JR; Palmer, RA

Published Date

  • November 5, 2002

Published In

Volume / Issue

  • 35 / 23

Start / End Page

  • 8794 - 8801

International Standard Serial Number (ISSN)

  • 0024-9297

Digital Object Identifier (DOI)

  • 10.1021/ma012135a

Citation Source

  • Scopus