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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Veröffentlicht in:	Solar energy 2018-09, Vol.172, p.141-145
Hauptverfasser:	Wallner, Gernot M., Grabmann, Michael K., Klocker, Clemens, Buchberger, Wolfgang, Nitsche, David
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorbers Absorbers (materials) Accumulators Aging Air temperature Antioxidants Black carbon Carbon Carbon black Carbon nanotubes Copolymers High temperature Material degradation in hot air Morphology Nanotechnology Nanotubes Overheating Oxidation Polypropylene Polypropylene absorber material Solar collectors Solar energy Solar heating Solar thermal collectors Stiffness Thermal energy Thermal properties Thermodynamic properties
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Zusammenfassung:	•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 (
ISSN:	0038-092X 1471-1257
DOI:	10.1016/j.solener.2018.06.023