Holograms were captured by a CCD camera (1024 x 1024 pixels, 30 fps) with magnification 10x (objective NA = 0.3; FOV = max 660 µm; no immersion). The lateral resolution was 0.1 µm and the axial resolution was below 1 nm. Data were analyzed using the Koala software of Lyncée Tec. Prior to measurement, samples were placed between two microscope slides, heated to about 20 °C above melting temperature, and cooled to room temperature. The samples were a few µm thick between the slides 2.8 Thermal properties. Thermal studies were performed using differential scanning calorimetry (DSC). Measurements were performed on a polymer powder sealed in hermetic aluminum pans using a TA Instruments DSC Q2500 Discovery differential scanning calorimeter in the heating-coolingheating cycles with the standard rate of 10 °C/min. The measurements were conducted over the temperature range of -90 to 200 °C under a nitrogen atmosphere. The glass transition temperatures (Tg) were taken as a midpoint of the transition during a second heating stage. The melting temperature (Tm) and the crystallization temperature (Tc) were verified as the maximum of the endothermic or exothermic peaks at the DSC thermographs, respectively. Furthermore, the enthalpy of melting (∆Hm) and crystallization (∆Hc) were established by the integration of the normalized area of the peaks related to a stated transition. The total crystalline phase content (Xc,tot) and crystalline phase content in the hard segments (Xc,h) were calculated using equations ( ) and (3), respectively.