Conductivity and dielectric behaviour studies of starch/PEO+x wt-%NH 4NO 3 polymer electrolyte
Polymer blending is used to overcome the disadvantage of pure starch film, and in the present study, starch has been blended with poly(ethylene oxide) (PEO). The X-ray diffraction study shows that starch/PEO with a ratio of 7 : 3 exhibits the least amount of crystallinity, and this was chosen in the...
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| Main Authors: | , , |
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| Format: | Conference Paper |
| Language: | en_US |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://ddms.usim.edu.my/handle/123456789/9169 |
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| Institution: | Universiti Sains Islam Malaysia |
| Language: | en_US |
| Summary: | Polymer blending is used to overcome the disadvantage of pure starch film, and in the present study, starch has been blended with poly(ethylene oxide) (PEO). The X-ray diffraction study shows that starch/PEO with a ratio of 7 : 3 exhibits the least amount of crystallinity, and this was chosen in the preparation of polymer electrolyte. Films of starch/PEO blends were then prepared via solution casting technique, and their properties with different amounts of ammonium nitrate NH 4NO 3 were compared. The highest conductivity at room temperature of ̃2•81±0• 46×10 7 S cm -21 was achieved with the addition of 35 wt-%NH 4NO 3. Dielectric data were analysed using complex permittivity and complex electrical modulus for the sample with the highest ionic conductivity. The relaxation time τ for these samples was determined, and the plot shows that t decreases with conductivity of the complexes. The presence of peaks in the imaginary plots shows that the starch/ PEO electrolyte system is an ionic conductor. © W. S. Maney & Son Ltd. 2011. |
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