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Temperature dependence of hydrogen bond in Fe-OCAP/polyurethane blends

Authors

  • Yang Ti,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
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  • Dajun Chen

    Corresponding author
    • State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
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Correspondence to: D. Chen (E-mail: cdj@dhu.edu.cn)

ABSTRACT

Fourier transform infrared (FTIR) thermal analysis was utilized to study the temperature dependence of hydrogen bond in Fe-octacarboxyl acid phthalocyanine (Fe-OCAP)/polyurethane (PU) blends. Two regions in the FTIR spectra were concerned to investigate the difference of the degree of hydrogen bond in the samples: the [BOND]NH stretching region (3210–3460 cm−1) and carbonyl stretching region (1680–1760 cm−1). It was found that the average strength of hydrogen bond in the modified samples was stronger than that in pure PU. With increasing Fe-OCAP content, the hydrogen bonded [BOND]NH and carbonyl groups were increased, while with increasing temperature they decreased. The equilibrium between free and hydrogen bonded carbonyl groups was discussed. The dissociation enthalpy for hydrogen bonded carbonyl of the samples was increased with increasing Fe-OCAP content. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2265–2271, 2013

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