Crystallization of β-nucleated iPP at processing-relevant cooling conditions was evaluated.
The investigation was performed using chip calorimetry and microfocus X-ray diffraction.
The cooling rate controls the crystallization temperature, and with that the crystal polymorph forming.
Critical cooling rates which trigger formation of α- or β-crystals in presence of γ-quinacridone were identified.
The effect of the content of γ-quinacridone in iPP was addressed.