INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Effect of the storage time in the performance of thermoplastic starch films
Autor/es:
VERA ALVAREZ; LEANDRO LUDUEÑA; PAULA GUARÀS
Lugar:
Mar del Plata
Reunión:
Simposio; XVI Latin-American Polymer Symposium (SLAP 2018), XIV Iberoamerican Polymer Congress (CIP 2018); 2018
Institución organizadora:
Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA)
Resumen:
Petrochemical based polymers, have been increasingly used as packaging materials, owing to relatively low cost and mechanical and vapor/oxygen barrier properties that fulfill the requirements of this application. For some applications such as thin films in contact with food recycling is impractical and economically not convenient. This situation and the non-biodegradable characteristic of these materials, has caused a major environmental problem regarding the disposal of waste. Currently there is a growing interest in the use of biodegradable polymers with functionalities and processabilities comparable to traditional petrochemical-based polymers.Used of starch as a raw material for the manufacturing of biodegradable products has been studied intensively in recent times, with clear indications of the advantages and limitations imposed by the used of this raw material. Due the hydrophilic nature of starch, products are sensitive to changes of ambient humidity and have poor mechanical properties. If stored under controlled conditions, mechanical properties have been observed to change, and were found that be correlated with changes in crystallinity. The aim of this work is to develop a twin screw extrusion process at pilot plant scale to prepare TPS films with optimized mechanical properties and water vapor absorption for packaging applications. The physical/chemical structure, mechanical/thermal properties and water absorption of TPS during storage at 25 °C and 50% of relative humidity (RH) for a period between 0-9 months will be analyzed.