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Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins

In a circular economy, polymeric materials are used in multiple loops to manufacture products. Therefore, closed-loops are also envisaged for the mechanical recycling of plastics, in which plastic is used for products that are in turn collected and reprocessed again and again to make further product...

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Autores principales: Langwieser, Johanna, Schweighuber, Andrea, Felgel-Farnholz, Alexander, Marschik, Christian, Buchberger, Wolfgang, Fischer, Joerg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9231274/
https://www.ncbi.nlm.nih.gov/pubmed/35746005
http://dx.doi.org/10.3390/polym14122429
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author Langwieser, Johanna
Schweighuber, Andrea
Felgel-Farnholz, Alexander
Marschik, Christian
Buchberger, Wolfgang
Fischer, Joerg
author_facet Langwieser, Johanna
Schweighuber, Andrea
Felgel-Farnholz, Alexander
Marschik, Christian
Buchberger, Wolfgang
Fischer, Joerg
author_sort Langwieser, Johanna
collection PubMed
description In a circular economy, polymeric materials are used in multiple loops to manufacture products. Therefore, closed-loops are also envisaged for the mechanical recycling of plastics, in which plastic is used for products that are in turn collected and reprocessed again and again to make further products. However, this reprocessing involves degradation processes within the plastics, which become apparent through changes in the property profile of the material. In the present paper, the influence of multiple recycling loops on the material properties of four different polyolefins was analyzed. Two different closed-loop cycles with industrially sized processing machines were defined, and each polyolefin was processed and reprocessed within the predefined cycles. For the investigation of the effect of the respective loops, samples were taken after each loop. The samples were characterized by high-pressure liquid chromatography coupled to a quadru-pole time-of-flight MS, high-temperature gel permeation chromatography, melt flow rate measurements, infrared spectroscopy, differential thermal analysis, and tensile tests. With increasing number of processing loops, the tested polyolefins showed continuous material degradation, which resulted in significant changes in the property profiles.
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spelling pubmed-92312742022-06-25 Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins Langwieser, Johanna Schweighuber, Andrea Felgel-Farnholz, Alexander Marschik, Christian Buchberger, Wolfgang Fischer, Joerg Polymers (Basel) Article In a circular economy, polymeric materials are used in multiple loops to manufacture products. Therefore, closed-loops are also envisaged for the mechanical recycling of plastics, in which plastic is used for products that are in turn collected and reprocessed again and again to make further products. However, this reprocessing involves degradation processes within the plastics, which become apparent through changes in the property profile of the material. In the present paper, the influence of multiple recycling loops on the material properties of four different polyolefins was analyzed. Two different closed-loop cycles with industrially sized processing machines were defined, and each polyolefin was processed and reprocessed within the predefined cycles. For the investigation of the effect of the respective loops, samples were taken after each loop. The samples were characterized by high-pressure liquid chromatography coupled to a quadru-pole time-of-flight MS, high-temperature gel permeation chromatography, melt flow rate measurements, infrared spectroscopy, differential thermal analysis, and tensile tests. With increasing number of processing loops, the tested polyolefins showed continuous material degradation, which resulted in significant changes in the property profiles. MDPI 2022-06-15 /pmc/articles/PMC9231274/ /pubmed/35746005 http://dx.doi.org/10.3390/polym14122429 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Langwieser, Johanna
Schweighuber, Andrea
Felgel-Farnholz, Alexander
Marschik, Christian
Buchberger, Wolfgang
Fischer, Joerg
Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title_full Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title_fullStr Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title_full_unstemmed Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title_short Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins
title_sort determination of the influence of multiple closed recycling loops on the property profile of different polyolefins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9231274/
https://www.ncbi.nlm.nih.gov/pubmed/35746005
http://dx.doi.org/10.3390/polym14122429
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