Mass Remainder Analysis is a technique used for the characterization of copolymers samples. I used MALDI/TOF spectrometer for recognition of the composition of 2 copolymers samples, D2002 and PE4300. The spectra generated for each of the samples, was used for the identification of peaks and series that allow their description by considering their abundance and their m/z (mass to charge ratio). Through the filtering of the main peaks and handling their raw values, I did the calculation of the most important chemical composition properties for the copolymers samples. This last let me characterize them by means some of their properties, the identification of monomer units and their structure.