Determination of Order-Disorder Transition of Polystyrene-block-poly(n-pentyl methacrylate) Copolymer by Temperature-dependent FTIR Spectroscopy

ORAL

Abstract

The lower disorder-to-order transition (LDOT) and the upper order-to-disorder transition (UODT) temperatures of polystyrene-block-poly(n-pentyl methacrylate) (PS-PnPMA) were measured by temperature-dependent Fourier transform infrared (FTIR) spectra with principal component analysis (PCA) and two-dimensional (2D) correlation spectroscopy. These two transitions are determined from sudden changes of the intensity (A) at specific wavelength as a function of temperature. We found that when the first derivative of A with respective to temperature (dA/dT) is plotted against temperature, the maximum in dA/dT at all wavelengths was observed at these two transitions.

*This work was supported by Creative Research Initiative Program supported by KOSEF

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Authors

  • Jin Kon Kim

    • POSTECH
    • Pohang University of Science and Technology

  • Hye J. Kim

    • Dept. of Chemical Engineering, Pohang U. of Science and Technology

  • Young M. Jung

  • Seung B. Kim

    • Dept. of Chemistry, Pohang U. of Science and Technology

  • Du Yeol Ryu

  • Kristopher Lavery

  • Thomas P. Russell

    • UMASS Amherst
    • University of Massachusetts, Amherst
    • Polymer Science and Engineering Department, University of Massachusetts, Amherst
    • University of Massachusetts-Amherst, Department of Polymer Sciece and Engineering
    • U. of Massachusetts
    • University of Massachusetts
    • Dept. of Polymer Science and Engineering, University of Massachusetts, Amherst
    • University of Massachusetts-Amherst
    • Dept. of Polymer Science and Eng. UMASS - Amherst
    • Polymer Sci. Eng. Univ. of Mass at Amherst