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vol.58 número4ELECTROOXIDATION OF 2,4,6-TRICHLOROPHENOL ON GLASSY CARBON ELECTRODES MODIFIED WITH COMPOSITE Ni(OH)2-Co(OH)2 FILMSPOLYETHYLENE GLYCOL EFFECT ON THE TRANSIENT AND STEADY STATE PHASES OF P-NITROPHENYLTRIMETHYL ACETATE HYDROLYSIS CATALYZED BY α-CHYMOTRYPSIN índice de autoresíndice de materiabúsqueda de artículos
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Journal of the Chilean Chemical Society

versión On-line ISSN 0717-9707

Resumen

GATICA, NICOLÁS; SOTO, LESLIE; MORAGA, CONSTANZA  y  VERGARA, LORETO. BLENDS OF POLY(N-VINYL-2-PYRROLIDONE) AND DIHYDRIC PHENOLS: THERMAL AND INFRARED SPECTROSCOPIC STUDIES. PART IV. J. Chil. Chem. Soc. [online]. 2013, vol.58, n.4, pp.2048-2052. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072013000400032.

The blending behaviour of binary systems formed by the polymer component poly(N-vinyl-2-pyrrolidone) (PVP) and the low molecular weight compounds 4,4'-biphenol (44BP) and 2,2'-biphenol (22BP) was studied. The blends were characterized in the entire composition range by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM). Both, the glass transition temperature (Tg) and the melting point (Tm) of the pure components were affected as a consequence of the blending process. It was observed miscibility between the components in both blends and a higher interaction degree in the blend containing 44BP. FTIR analysis detected the hydrogen bonding as intermolecular interaction responsible of the observed miscibility, by means of the variation in the wave number corresponding to the stretching vibration of PVP carbonyl group. TGA and SEM analyses provided coherent and complementary results with both DSC and FTIR.

Palabras clave : Polymer blends; poly (N-vinyl-2-pyrrolidone); 4,4'-biphenol; 2,2'-biphenol; hydrogen bond; low molecular weight compounds.

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