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Comparative SAXS, DSC and FT-IR Spectra of Polyurethane Coatings Filled with Hexagonal and Sword-like Zinc Oxide

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Abstract

The loading and morphology of zinc oxide (ZnO) affect the bonding and segmentation in commercial polyurethane (PU) coatings. By virtue of surface modification, hexagonal ZnO microprisms can be uniformly dispersed in PU matrix even at a loading as high as 25 wt%. However, the disruption of ZnO fillers can be observed with the suppression of characteristic PU absorption bands in Fourier transform infrared (FT-IR) spectra and the enthalpy reduction in differential scanning calorimetry (DSC) thermograms. The morphological effect is highlighted by the significant changes in DSC and FT-IR spectra when hexagonal ZnO is substituted with the sword-like counterpart. The results suggest that more sword-like ZnO can be loaded in PU coatings with a less disruption in bonding and segmentation.

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Authors and Affiliations

  1. Magnet Laboratory, School of Science, Walailak University, Nakhon Si Thammarat, Thailand

    Chitnarong Sirisathitkul & Thanida Chareonsuk

  2. Department of Physics, Faculty of Science, Thaksin University, Phatthalung, Thailand

    Chat Pholnak

  3. Thailand Center of Excellence in Physics, CHE, 328 Si Ayutthaya Rd., Bangkok, Thailand

    Pornsak Panchawirat

  4. Synchrotron Light Research Institute, Nakhon Ratchasima, Thailand

    Supagorn Rugmai

Authors
  1. Chitnarong Sirisathitkul
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  2. Chat Pholnak
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  3. Thanida Chareonsuk
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  4. Pornsak Panchawirat
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  5. Supagorn Rugmai
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Correspondence to Chitnarong Sirisathitkul.

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Sirisathitkul, C., Pholnak, C., Chareonsuk, T. et al. Comparative SAXS, DSC and FT-IR Spectra of Polyurethane Coatings Filled with Hexagonal and Sword-like Zinc Oxide. Arab J Sci Eng 41, 2339–2344 (2016). https://doi.org/10.1007/s13369-015-1948-7

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  • DOI: https://doi.org/10.1007/s13369-015-1948-7

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