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Open AccessArticle

Mass Spectrometry Reveals Molecular Structure of Polyhydroxyalkanoates Attained by Bioconversion of Oxidized Polypropylene Waste Fragments

1
Wolverhampton School of Biology, Chemistry and Forensic Science, Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton WV1 1LY, UK
2
Laboratorio Materiali Polimerici Ecocompatibili (LMPE), via Nuova, 44/a, Segromigno in Monte, 55018 Capannori (LU), Italy
3
Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-800 Zabrze, Poland
4
Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology, 44-100 Gliwice, Poland
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(10), 1580; https://doi.org/10.3390/polym11101580
Received: 14 August 2019 / Revised: 18 September 2019 / Accepted: 25 September 2019 / Published: 27 September 2019
(This article belongs to the Special Issue Polymer Mass Spectrometry)
This study investigated the molecular structure of the polyhydroxyalkanoate (PHA) produced via a microbiological shake flask experiment utilizing oxidized polypropylene (PP) waste as an additional carbon source. The bacterial strain Cupriavidus necator H16 was selected as it is non-pathogenic, genetically stable, robust, and one of the best known producers of PHA. Making use of PHA oligomers, formed by controlled moderate-temperature degradation induced by carboxylate moieties, by examination of both the parent and fragmentation ions, the ESI-MS/MS analysis revealed the 3-hydroxybutyrate and randomly distributed 3-hydroxyvalerate as well as 3-hydroxyhexanoate repeat units. Thus, the bioconversion of PP solid waste to a value-added product such as PHA tert-polymer was demonstrated. View Full-Text
Keywords: electrospray ionization dual mass spectrometry (ESI-MS/MS); polyhydroxyalkanoate (PHA); polypropylene (PP); prodegraded; Cupriavidus necator; coral reef; bioplastics; recycling electrospray ionization dual mass spectrometry (ESI-MS/MS); polyhydroxyalkanoate (PHA); polypropylene (PP); prodegraded; Cupriavidus necator; coral reef; bioplastics; recycling
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Johnston, B.; Radecka, I.; Chiellini, E.; Barsi, D.; Ilieva, V.I.; Sikorska, W.; Musioł, M.; Zięba, M.; Chaber, P.; Marek, A.A.; Mendrek, B.; Ekere, A.I.; Adamus, G.; Kowalczuk, M. Mass Spectrometry Reveals Molecular Structure of Polyhydroxyalkanoates Attained by Bioconversion of Oxidized Polypropylene Waste Fragments. Polymers 2019, 11, 1580.

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