Sodium Alginate and Poly(ethylene glycol) Blends: Thermal and Morphological Behaviors |
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| Authors: | T. M. Mruthyunjaya Swamy B. Ramaraj Siddaramaiah |
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| Affiliation: | 1. Department of Chemistry , Marimallappa's PU College , Seetha Vilasa Road, Mysore, India;2. Central Institute of Plastics Engineering and Technology , 437/A, Hebbal Industrial Area, Mysore, India;3. Department of Polymer Science and Technology , Sri Jayachamarajendra College of Engineering , Mysore, India |
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| Abstract: | Sodium alginate (SA) was blended with varying amounts of poly(ethylene glycol) (PEG) viz., 10, 20, 30, 40 and 50 wt % by using water as a solvent. The obtained SA/PEG blends have been characterized for thermal behavior by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) and surface morphology by scanning electron microscopic (SEM) methods. DSC analysis indicates the increase in glass transition temperature (Tg) of the blends with an increase in PEG content in the blend, which is due to chain entanglement. TGA results reveal the enhancement of thermal stability of SA/PEG blends in terms of the onset of degradation and percentage of weight loss. SEM photomicrographs shows the two phase morphology. This result indicates the immiscible nature of the SA/PEG blends. |
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| Keywords: | Sodium alginate poly(ethylene glycol) blends differential scanning calorimetry thermogravimetric analysis morphology |
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