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The objective of this study was to evaluate the tannin extraction potential taken from the bark of Acacia dealbata.This tannins were extracted with water at 90°C.An extraction yield of 17.2% solids with a Stiasny number of 82% was obtained from the bark extract of Acacia dealbata.The structure was studied by Fourier transform infrared spectroscopy (FTIR).The thermal behavior of tannins was studied by DSC and a glass-transition temperature (T g ) of 116,77°C was determined.The thermal stability of tannins was studied by TGA.At 196.91°C the decomposition is 3.7% and the maximum of the weight loss rate (DTG) of the degradation was 257.77°C.The curing with formaldehyde showed an exotherm reaction in the range of 100-120°C, which is similar to tannins of other species.
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LISPERGUER et al. (2016) studied this question.