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This work aims to analyze the influence of poly (ethylene glycol) (PEG) in the properties of chitosan (CS) / poly (vinyl alcohol) (PVA) blends. For this purpose, the CS / PVA films proportions 1: 1 and 2: 1 respectively, were prepared without and with 1% PEG and 2, relative to the total weight of the polymers by the solution method. Then the films were characterized by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and thermogravimetry (TG). It was observed that increasing PEG concentration promoted a greater interlayer spacing between the chains and the presence of PEG did not affect the melting temperatures of the blends. In comparative analysis, we had to blend the CS / PVA (1: 1) with 2% PEG was composition with improved thermal stability. Finally, it was shown that the presence of PEG influence the morphology and the thermal properties of the CS / PVA blends.

Influência do poli (etileno glicol) nas propriedades das blendas de quitosana/poli (alcool vinílico)