Publications [#233677] of Richard A. Palmer

Journal Articles

  1. Schoonover, JR; Steckle Jr, WP; Johnston, CT; Wang, Y; Gillikin, AM; Palmer, RA, "“Humidity-Dependent Dynamic Infrared Linear Dichroism of a Poly(Ester Urethane)”", Spectrochemica Acta Part A. Molecular and Biomolecular Spectroscopy, 2007, 67(1), 208-213 [Gateway.cgi], [doi].
    (last updated on 2024/11/19)

    Abstract:
    Fourier transform infrared techniques, infrared difference spectroscopy and dynamic infrared linear dichroism (DIRLD), have been utilized to explore the effects of humidity and water absorption on a poly(ester urethane). An environmental infrared microbalance cell was used to measure the infrared spectra as a function of humidity and accompanying weight change for the absorption-desorption processes. The infrared difference data indicate that exposure to humidity affects the hydrogen-bonding interactions in the polymer. Dynamic infrared linear dichroism studies in tensile deformation mode as a function of humidity demonstrate how changes in water content affect the orientational response of functional groups. Complex behavior as a function of humidity for functional groups involved in hydrogen bonding indicates that water absorbed by the polymer affects the micro-environments near these functional groups.