INFLUÊNCIA DE ALGUNS PARÂMETROS NOS RESULTADOS DE ANÁLISES TÉRMICAS DO ÁLCOOL POLIVINÍLICO.

The present work seeks to demonstrate through a series of experiments such as the parameters heating rate, type of stand and physical form of the sample, can influence the qualitative and quantitative aspects of the results of the thermal analyzes of TGA and DSC. To do this, polyvinyl alcohol, a synthetic polymer was used as a model and its thermal behavior was discussed by the results obtained by the thermogravimetric (TGA) and DSC curves, showing the effect of the alteration of each parameter, such as the displacement at the temperature at which the thermal events occur in the TGA curves, related to the alteration of the physical form of the sample; the intensification of the DSC peaks due to the increase of the heating rate, the change in the heat flow by changing the stand and masking some events such as the glass transition temperature. [ABSTRACT FROM AUTHOR]