Ngb817526

The crystallinity and the crystallization temperature of the coated powders are determined by differential scanning calorimetry (DSC). For this purpose, a Polyma 214 (Netzsch, Selb, Germany) is used. The samples with a weight of 10 mg ± 0.1 mg are measured with covered aluminum pans type Concavus Lids (Al), NGB817526 (Netzsch, Germany) with dry nitrogen gas purging at 40 mL min⁻¹. As the melting temperature of the PP is at 186 °C, the temperature profile to measure the thermogram is as following: (1) Start at 20 °C, (2) heating to 200 °C by a gradient of 10 K min⁻¹, (3) isothermal step of 60° s, (4) cooling by a gradient of 10 K min⁻¹.

The thermal properties of the wet ground polymers were analysed by DSC (Polyma 214, Netzsch, Polyma 214, Selb, Bavaria, Germany). All samples (weight: 10 ± 0.1 mg) were placed in standard aluminum pans (concavus Lids (Al) NGB817526, Netzsch, Selb, Bavaria, Germany) with covers and measured in flushed dry nitrogen atmosphere. For dynamic measurements, the samples were heated and cooled from 20 °C to 260 °C at 10 K/min two times. For isothermal measurements, see Figure 3, the samples were heated up (100 K/min) to 260 °C (I) and tempered for 1 min to ensure complete melting of the sample (II). Next, the sample was quickly cooled down (−200 K/min) with no temperature dip to the isothermal temperature of 209 °C (III) and held there for 120 min (IV). Finally, the sample was heated up (10 K/min) to 260 °C (V) to evaluate the melting behaviour of the isothermally crystallised sample.