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Starch plastic films made ​​from cassava stem starch by using glycerol as plasticizer and acetic acid as a catalyst gelatinized at 75 °C for 15 minutes. Starch weight, water volume, glycerol volume, and acetic acid volume w ere varied. T he variation conditions of 3 ml of acetic acid volume (3:10 w/w) and 2 ml of glycerol volume (1:4 w/w) gave t he best of tensile strength and elongation at break analysis . While at water volume variation, the tensile strength value is inversely proportional to the elongation at break. In FTIR analysis found that α-1,6 glycosidic (1010 cm -1 ) spectrum disappears as the effect of acetic acid presence, while the spectrum of α-1,4 glycosidic, COH, C=O, and OH shifted as the plasticization effect.

KAJIAN AWAL PEMBUATAN FILM PLASTIK (BAHAN PLASTIK PENGEMAS) DARI PATI BATANG UBI KAYU