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This research aims to synthesize and characterize the properties of starch and starch/CMC-based bioplastics and to know the effect of sorbitol concentration on bioplastics produced. Characterization the bioplastics used SEM, FTIR and XRD as well as thickness, tensile strength, elongation at break, and resistant to water and acid. The result showed that synthesis of starch and starch-bioplastic success and the surface of bioplastics is uniform, except bioplastic from pure starch. Starch/CMC-based bioplastics is thinner (106.67 ± 5.13 μm), lower tensile strength (8.95 N), more easily degraded by water (33 hours) and acid (15 hours) but highest elongation at breaks (48.15%) than starch based-bioplastics. Sorbitol concentration is proportional to the level of elongation at break and the optimum concentration which added to starch-based bioplastic is 15 mL/20g starch.

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