Aging of polypropylene random copolymers studied by NMR relaxometry
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DOI: 10.1016/j.polymer.2021.124102
Abstract: Abstract The aging behavior of a series of polypropylene random copolymer (PP-RCP) reactor powder samples was studied by NMR relaxometry, a.k.a. Industrial Magnetic Resonance (IMR). The samples, which had been stored for two years since… read more here.
Keywords: studied nmr; aging polypropylene; polypropylene random; nmr relaxometry ... See more keywords
Study of the Long-Term Aging of Polypropylene-Made Disposable Surgical Masks and Filtering Facepiece Respirators
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DOI: 10.3390/polym15041001
Abstract: The main purpose of this work is to contribute to understanding the mechanism of oxidation of the polymeric components of common disposable masks used during the COVID-19 pandemic to offer the chemical basis to understand… read more here.
Keywords: long term; oxidation; term aging; study long ... See more keywords