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Recycling and Circularity of Polymeric Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Circular and Green Sustainable Polymer Science".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 2643

Special Issue Editors


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Guest Editor
Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, SE-41296 Gothenburg, Sweden
Interests: processing and properties of polymeric materials; cellulosic composites; bioplastics and mechanical recycling of thermoplastics

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Guest Editor
Department of Industrial and Materials Science, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
Interests: physical properties of polymeric materials; polymer physics; rheology; time-dependent mechanical properties of polymers

Special Issue Information

Dear Colleagues,

Extended and efficient use of polymeric materials has been of great interest in society for many decades, as can be seen in public media, in legislation and in academic efforts. Substantial scientific efforts have been devoted to discussions on possibilities and problems involved, such as with mechanical recycling of polymers. This Special Issue aims at a continued discussion on polymer recycling in general, both quantitative and qualitative aspects, towards a better understanding of both the context and the problems involved. We welcome all scientific contributions promoting a critical discussion on these topics!

Prof. Dr. Antal Boldizar
Prof. Dr. Mikael Rigdahl
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • recycling of plastics
  • resource efficiency
  • polymeric materials
  • degradation of polymers
  • recycling processes
  • properties of plastics waste

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Published Papers (1 paper)

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Research

22 pages, 16362 KiB  
Article
Effect of Surface Contamination on Near-Infrared Spectra of Biodegradable Plastics
by Namrata Mhaddolkar, Gerald Koinig, Daniel Vollprecht, Thomas Fruergaard Astrup and Alexia Tischberger-Aldrian
Polymers 2024, 16(16), 2343; https://doi.org/10.3390/polym16162343 - 19 Aug 2024
Cited by 2 | Viewed by 2226
Abstract
Proper waste sorting is crucial for biodegradable plastics (BDPs) recycling, whose global production is increasing dynamically. BDPs can be sorted using near-infrared (NIR) sorting, but little research is available about the effect of surface contamination on their NIR spectrum, which affects their sortability. [...] Read more.
Proper waste sorting is crucial for biodegradable plastics (BDPs) recycling, whose global production is increasing dynamically. BDPs can be sorted using near-infrared (NIR) sorting, but little research is available about the effect of surface contamination on their NIR spectrum, which affects their sortability. As BDPs are often heavily contaminated with food waste, understanding the effect of surface contamination is necessary. This paper reports on a study on the influence of artificially induced surface contamination using food waste and contamination from packaging waste, biowaste, and residual waste on the BDP spectra. In artificially contaminated samples, the absorption bands (ADs) changed due to the presence of moisture (1352–1424 nm) and fatty acids (1223 nm). In real-world contaminated samples, biowaste samples were most affected by contamination followed by residual waste, both having altered ADs at 1352–1424 nm (moisture). The packaging waste-contaminated sample spectra closely followed those of clean and washed samples, with a change in the intensity of ADs. Accordingly, two approaches could be followed in sorting: (i) affected wavelength ranges could be omitted, or (ii) contaminated samples could be used for optimizing the NIR database. Thus, surface contamination affected the spectra, and knowing the wavelength ranges containing this effect could be used to optimize the NIR database and improve BDP sorting. Full article
(This article belongs to the Special Issue Recycling and Circularity of Polymeric Materials)
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