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Thermal and morphological properties of SA/HPMC blends

Authors

  • T. M. Mruthyunjaya Swamy,

    1. Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore 570006, Karnataka, India
    2. Marimallappa College, Mysore 570024, India
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  • B. Ramaraj,

    1. Research and Development Department, Central Institute of Plastics Engineering and Technology, Mysore 570016, Karnataka, India
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  • Siddaramaiah

    Corresponding author
    1. Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore 570006, Karnataka, India
    • Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore 570006, Karnataka, India
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Abstract

Sodium alginate (SA) was blended with varying amounts of hydroxypropyl methylcellulose (HPMC) viz., 10, 20, and 30 wt % by solution casting process. Thus, the obtained blends were characterized by using different analytical techniques such as differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microcopy (SEM). FTIR studies reveal the hydrogen bond formation between hydroxyl groups of SA and HPMC polymer chains. DSC analysis shows single glass transition temperature (Tg) for SA/HPMC blends indicating compatibility and physical interaction between SA and HPMC polymer chains. TGA analysis indicates variation of thermal stability of SA with change in compositions of HPMC. SEM studies reveal uniform distribution of second phase in the blends. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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