A method to evaluate both the growth rate and the number of spherulites effectively growing with time at constant temperature is shown for a polyoxymethylene copolymer (POMC). It consists in following the development of the crystallinity with time by differential scanning calorimetry and in estimating the maximum radial dimension of coalesced spherulites in the crystallized sample by scanning electron microscopy. The method is applicable to any linear polymer to obtain information on the nucleation and growth processes.
