VASILICA POPESCU, GABRIEL POPESCU, IRINA CRINA ANCA SANDU HIGHLIGHTING A COTTON GRAFTING PROCESS USING THE SPECTRAL SUBTRACTION METHOD AND STATISTICAL ANALYSIS Spectral subtraction method was used to prove the grafting onto cotton fabrics of some derivatives of glyoxal with monochlorotriazinyl-b-cyclodextrin (MCT-b-CD). Glyoxal was initially brought in contact with HCl. The formed compound was brought in contact with MCT-b-CD, in presence of NaOH as catalyst. The resulted product was applied on cotton samples using the pad-dry-cure technology. The presence of MCT-b-CD on the final samples was confirmed by a spectroscopic analysis (spectral subtraction method) and the phenolphthalein test. Spectral subtraction method notifies any change between two (or more) FT-IR spectra. This method is very useful when the analyzed spectra are very similar and the classic FT-IR analysis fails to clearly highlight what is different between those 2 spectra, because the overlays are illegible. The grafting effects were confirmed by the increases of take-up degrees and wrinkle recovery angles (WRA). The WRA results were statistic analyzed with the standard deviation SD, the standard error of the mean (SEM) and the coefficient of variation (CV). The taking-up degrees considerably increased as compared to the reference samples, and the WRA values depend on the length and the flexibility of the product grafted on cotton.