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Thermal and mechanical properties of poly(vinyl alcohol) plasticized with glycerol

Authors

  • Mahmood Mohsin,

    Corresponding author
    1. Department of Chemistry, United Arab Emirates University, P O Box 17551, Al Ain, United Arab Emirates
    • Department of Chemistry, United Arab Emirates University, P O Box 17551, Al Ain, United Arab Emirates
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  • Asiful Hossin,

    1. Department of Mechanical Engineering, United Arab Emirates University, P O Box 17555, Al Ain, United Arab Emirates
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  • Yousef Haik

    1. Department of Mechanical Engineering, United Arab Emirates University, P O Box 17555, Al Ain, United Arab Emirates
    2. Center for Research Excellence in Nanobiosciences, University of North Carolina at Greensboro, Greensboro, North Carolina, US
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Abstract

Thermomechanical behavior of membranes based on blends of poly(vinyl alcohol) (PVA) with different weight percentage (wt %) of glycerol has been studied. Solid-state PVA/Glycerol polymer membranes were prepared by a solution casting method. The films were studied for thermal characteristics by differential scanning calorimetry (DSC) and thermogravimetric analysis and for the mechanical properties including hardness and modulus by nanoindentation method. The dispersion of glycerol within the polymer matrix was examined using scanning electron microscopy. Fourier transform infrared spectroscopy was used to confirm the formation of hydrogen bonding between the plasticizer and PVA in their blends and also to provide information on compatibility and physical interactions between the glycerol and PVA. It was found that the thermal properties particularly the melting point (Tm) for PVA blends exhibit a reduced value proportional to the glycerol content. The hardness and elastic modulus were also found to decrease with an increase in plasticizer content. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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