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Effects of UV Stabilizers on Polypropylene Outdoors

Laboratory of Advanced Polymers and Optimized Materials (LAPOM), Department of Materials Science and Engineering, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA
Department of Civil Engineering, Faculty of Engineering, Bartin University, 74100 Bartin, Turkey
Authors to whom correspondence should be addressed.
Materials 2020, 13(7), 1626;
Received: 16 February 2020 / Revised: 12 March 2020 / Accepted: 17 March 2020 / Published: 1 April 2020
Hindered amine light stabilizers (HALSs) and nano ZnO were used to stabilize polypropylene (PP) film-based formulations that were exposed to ultraviolet (UV) light for different lengths of time, simulating the harsh outdoor weather of Dallas, Texas, USA. UV doses applied in our laboratory are 121 times larger than the UV dose provided by the sunlight in Texas. 15 different compositions were studied. Tensile behavior, UV transmittance, thermal stability (by thermogravimetric analysis) and dynamic friction of the so exposed PP-based films were determined. Scanning electron micrographs of fracture surfaces were obtained. Nano-ZnO-containing stabilizers impart strong UV resistance to our films. The combination of HALSs and nano-ZnO stabilizers makes the PP films harder—which is important for some PP applications, such as toy manufacturing. View Full-Text
Keywords: Polypropylene; polymer thermal stability; UV stabilizer; light stabilizer; Nano-ZnO; coatings Polypropylene; polymer thermal stability; UV stabilizer; light stabilizer; Nano-ZnO; coatings
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Brostow, W.; Lu, X.; Gencel, O.; Osmanson, A.T. Effects of UV Stabilizers on Polypropylene Outdoors. Materials 2020, 13, 1626.

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