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Polymer Degradation and Aging: Mechanisms and Environmental Impacts

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Analysis and Characterization".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 1114

Editors


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Guest Editor
1. Laboratory of Chemistry and Technology of Polymers and Colors, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
2. Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
Interests: polymer chemistry; environmental analytical chemistry; micro- and nanoplastics; UV aging; additives leaching

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Guest Editor
Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
Interests: monomer synthesis; biobased (co)polymers; biobased (nano)additives; natural antioxidant additives; ageing behaviour

Special Issue Information

Dear Colleagues,

The performance, durability, and environmental fate of polymeric materials are profoundly influenced by degradation and aging processes. This Special Issue aims to gather cutting-edge research and comprehensive reviews on the mechanisms, kinetics, and implications of polymer degradation under various environmental and engineered conditions. Topics of interest include thermal, photo-oxidative, mechanical, chemical, and biological aging of polymers; mechanisms of biodegradation and biofragmentation; and the formation of micro- and nanoplastics as degradation byproducts. Studies addressing degradation in water and wastewater systems, analytical and methodological advances for characterizing aged or weathered polymers, and the environmental and health impacts of degraded polymer particles are also welcome. By integrating insights from materials science, polymer chemistry, and environmental science, this Special Issue seeks to promote a holistic understanding of polymer aging and guide the development of more sustainable polymeric materials and mitigation strategies.

Dr. Nina Maria Ainali
Dr. Alexandra Zamboulis
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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.

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Keywords

  • polymer degradation
  • aging processes
  • biodegradation
  • microplastics and nanoplastics
  • environmental aging
  • weathering mechanisms
  • analytical characterization
  • polymer stability
  • environmental fate
  • sustainable polymers

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Published Papers (1 paper)

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Research

25 pages, 3313 KB  
Article
Utilization of Sewage Sludge-Derived Biochar as a Functional UV Stabilizer in Recycled Poly(ethylene terephthalate) Nanocomposite Materials
by Nikolaos Pardalis, Lazaros Karagiannidis, Panagiotis A. Klonos, Eleftheria Maria Pechlivani, Rafail O. Ioannidis, Apostolos Kyritsis, Konstantinos Chrisafis and Dimitrios N. Bikiaris
Polymers 2026, 18(14), 1758; https://doi.org/10.3390/polym18141758 - 19 Jul 2026
Viewed by 527
Abstract
This work investigates the incorporation of sewage sludge-derived biochar (BC) into a recycled poly(ethylene terephthalate) (rPET) matrix at loadings ranging from 0.5 to 5% wt. in order to develop sustainable nanocomposite materials. The materials were comprehensively characterized using complementary structural, thermal, and morphological [...] Read more.
This work investigates the incorporation of sewage sludge-derived biochar (BC) into a recycled poly(ethylene terephthalate) (rPET) matrix at loadings ranging from 0.5 to 5% wt. in order to develop sustainable nanocomposite materials. The materials were comprehensively characterized using complementary structural, thermal, and morphological techniques to evaluate the effect of BC on the properties of the recycled polymer. XRD, DSC, and PLM analyses demonstrated that BC acts as a heterogeneous nucleating agent, without significantly altering the final crystalline fraction of rPET, while SEM observations confirmed the homogeneous dispersion of particles within the matrix. TGA and Py–GC/MS further indicated that BC moderates thermal degradation, reducing the relative formation of low-molecular-weight degradation products and promoting the retention of larger terephthalate-containing fragments. Accelerated UV irradiation experiments further demonstrated the protective role of BC against photo-induced degradation. Intrinsic viscosity (IV) measurements showed that BC-containing nanocomposites exhibited a smaller molecular-weight reduction after UV exposure compared to neat rPET, indicating reduced chain scission, while complementary DSC analyses confirmed improved preservation of thermal transitions after aging. Overall, sewage sludge-derived biochar is demonstrated to be a promising multifunctional additive for rPET, acting both as a nucleating agent and a UV stabilizer. This approach provides an alternative route for the valorization of two waste streams, contributing to enhanced materials in a circular economy framework. Full article
(This article belongs to the Special Issue Polymer Degradation and Aging: Mechanisms and Environmental Impacts)
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