Conductivity and dielectric behaviour studies of starch/PEO+x wt-%NH 4NO 3 polymer electrolyte

• Main Authors: K, Ramly, M.I.N., Isa, A.S.A, Khiar
• Format: Conference Paper
• Language: en_US
• Published: 2015
• Subjects: Conductivity; Dielectric; PEO; Polymer blending; Starch
• Online Access: http://ddms.usim.edu.my/handle/123456789/9169
• Institution: Universiti Sains Islam Malaysia

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.