The polymer has important characteristics that directly influence the properties of the final product such as melting temperature, crystallinity, malleability and flexibility . One of these properties is the number-average molecular weight (Mn) and weight-average molecular weight (Mw). The first one is calculated by adding the molar masses of all chains generated throughout the process and dividing it by the total number of chains. The latter is calculated in a similar way, the focus, however, is found in the mass of the polymeric chains themselves, which makes the molar mass of each fraction contribute in a weighted way to the result.