Effect of carbon nanotubes on the global aging behavior of β-nucleated polypropylene random copolymers for absorbers of solar-thermal collectors

•Carbon nanotubes affect the semi-crystalline morphology (less β-phase content).•The material aging processes are more pronounced for PP formulations with CNTs.•Compared to carbon black modified grades a higher decay rate was ascertained.•Amount of black pigments should be kept at low levels (...

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