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Infrared spectra of (a) native starch and gel polymer electrolyte containing 1.4 g (E3) and 1.6 g (E4) of bare starch; (b) native starch and cross-linked starches A1, A2, and A3; (c) electrolytes E3, EC1, EC2, EC3 prepared using bare starch and cross-linked starch A1, A2, and A3, respectively.
