Biodegradability Study by FTIR and DSC of Polymers Films Based on Polypropylene and Cassava Starch

JUAN JIMÉNEZ

Orbital: The Electronic Journal of Chemistry

Universidade Federal de Mato Grosso

Lugar: Mato Grosso; Año: 2019

he polypropylene resistance to biological attacks is related to the lack of functional groups recognizable bymicrobial enzymatic systems. The incorporation of compatibilizing agents in polypropylene/starch blends favorsthe interactions of their components and can potentially induce the material degradation. In order to study thedegradation of polypropylene (PP)/cassava starch (S) blends, films were prepared with a compatibilizing agent(AC), constituted by polypropylene grafted with acrylamide (PP-g-AAm). The films were placed in an Erlenmeyerflask containing 100 ml of a basal mineral medium with microorganisms inoculated in a cellulose filter, taken froman effluent. The FTIR analyzes of the films with the AC agent showed significant differences in the absorptionbands, with respect to the control film. The asymmetric stretch signal of the grafted acrylamide that appeared at3292 cm -1 increased in intensity only in the inoculated blends. In addition, hydrolysis was evidenced by thestret