Resumo

AMAYA-PINOS, Jorge. Thermo-mechanical study of the mixture of polylactic acid PLA obtained from potato starch with an aliphatic copolyester PBSA (polybutylene sucyanate adipate). Dyna rev.fac.nac.minas [online]. 2022, vol.89, n.221, pp.142-150.  Epub 14-Set-2022. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v89n221.98414.

The conservation of the environment has led to research some polysaccharides with the objective of obtain bioplastics that can be dosed with other polymers and to has better properties. In this research, carried out a thermomechanical study of a dosage between polylactic acid obtained from potato starch with a thermoplastic polymer aliphatic polyester type called adipate socianate polybutylene. They were made different mixtures and analyzes such as differential scanning, thermogravimetric, infrared spectroscopy, fluidity index, hardness "SHORE" and a mechanical thermo-dynamic; and based on the results obtained, was determined the type of processing that the dosage can undergo. The dosages stated was from 94.5% PLA with 5% PBSA to 20% PLA with 79.5% PBSA adding 0.5% crodamide as a lubricating agent. The results concluded that the bioplastic in general can be processed by extrusion and thermoforming, because the values of the melt index are relatively low.

Palavras-chave : dosages; bioplastic; polylactic acid; thermomechanical properties.

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