Estudo das propriedades e biodegradabilidade de blendas de poliéster/amido submetidas ao ataque microbiano

AUTOR(ES)

Vinhas, Glória M., Almeida, Yêda M. B. de, Lima, Maria Alice Gomes de Andrade, Santos, Lívia Almeida

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2007

RESUMO

This work deals with the biodegradation of blends of poly(beta-hydroxybutyrate)/starch and poly(beta-hydroxybutyrate-co-hydroxyvalerate)/starch. The blends were obtained by evaporation of the solvent in the mixture of the polymers in chloroform. Tests were carried out in presence of micro-organisms which acted as biodegradation agents. The blends were consumed as carbon substrate and the production of CO2 was evaluated in the process. In addition, the polyesters' mechanical properties were reduced by the incorporation of starch in its structure. (¹H) NMR and infrared spectroscopy detected some characteristic polyester degradation groups in the polyesters' chemical structure, thus confirming the alteration suffered by it.

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