Thermal and microstructural characterization of biodegradable films prepared by extrusion–calendering process

摘要: Abstract Native starch (corn, potato and waxy corn) phosphorylated corn blended with bagasse fiber glycerol were used for the preparation of biodegradable films. The processing extrusion variables were: feed moisture FM (18.25–20.5%), content FC (0–10%) type TS (native or phosphorylated). analysis infrared spectroscopy showed OH C–O bands at 2750–3250 550–1000 cm−1, related to plasticizer–starch interactions. Films processed without revealed peaks low intensity associated plastizicing starch. Differential scanning calorimeter displayed some changes in calorific capacity that could be attributed molecular excitations mobility polymeric chains (Tg) a range temperature between 40 80 °C. dynamic mechanical analyses presented decrease loss modulus lower than 100 °C more structural bonds indicating film flexibility. thermal microstructural characterization films appropriate functional properties development packing materials flexible containers bag.