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Polymers
Special Issues
Advances in Polymer Recycling
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Advances in Polymer Recycling

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

Deadline for manuscript submissions: closed (10 April 2023) | Viewed by 4951

Special Issue Editor

Dr. Sylvie Dagréou

E-Mail Website
Guest Editor
Centre National de la Recherche Scientifique, Universite de Pau et des Pays de l’Adour, E2S UPPA, IPREM, Pau, France
Interests: recycling of polymers and composites; filled polymers; melt processing, structure - rheological properties relationship; modelling of viscoelastic properties

Special Issue Information

Dear Colleagues,

At a time when the regulatory framework for plastic waste management is becoming stricter, and with a growing awareness of the environmental risks associated with plastic pollution, the research effort on the recycling of polymer-based materials is increasing.

The present Special Issue of Polymers aims to gather cutting-edge reviews and original research papers on recent advances in polymer and polymer-based materials recycling, including (but not limited to):

  • Chemical recycling (solvent purification, depolymerization, gasification, pyrolysis, etc.);
  • Recycling of non-packaging waste (textile, sports goods, construction materials, etc.);
  • Identification and elimination of additives and disruptors in waste flows;
  • Recycling of elastomers;
  • Recycling of composites.

Dr. Sylvie Dagréou
Guest Editor

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.

Published Papers (2 papers)

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Research

11 pages, 21545 KiB  
Article
PET Waste Recycling into BTX Fraction Using In Situ Obtained Nickel Phosphide
by Maria Golubeva, Mariyam Mukhtarova, Alexey Sadovnikov and Anton Maximov
Polymers 2023, 15(10), 2248; https://doi.org/10.3390/polym15102248 - 10 May 2023
Cited by 4 | Viewed by 1923
Abstract
The annual production of plastic waste is a serious ecological problem as it causes substantial pollution of the environment. Polyethylene terephthalate, a material usually found in disposable plastic bottles, is one of the most popular material used for packaging in the world. In [...] Read more.
The annual production of plastic waste is a serious ecological problem as it causes substantial pollution of the environment. Polyethylene terephthalate, a material usually found in disposable plastic bottles, is one of the most popular material used for packaging in the world. In this paper, it is proposed to recycle polyethylene terephthalate waste bottles into benzene-toluene-xylene fraction using a heterogeneous nickel phosphide catalyst formed in situ during the polyethylene terephthalate recycling process. The catalyst obtained was characterized using powder X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy techniques. The catalyst was shown to contain a Ni2P phase. Its activity was studied in a temperature range of 250–400 °C and a H2 pressure range of 5–9 MPa. The highest selectivity for benzene-toluene-xylene fraction was 93% at quantitative conversion. Full article
(This article belongs to the Special Issue Advances in Polymer Recycling)
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17 pages, 4767 KiB  
Article
Corn Cob Char as Catalyst Support for Developing Carbon Nanotubes from Waste Polypropylene Plastics: Comparison of Activation Techniques
by Helen U. Modekwe, Kapil Moothi, Michael O. Daramola and Messai A. Mamo
Polymers 2022, 14(14), 2898; https://doi.org/10.3390/polym14142898 - 16 Jul 2022
Cited by 5 | Viewed by 2558
Abstract
The future and continuity of nanomaterials are heavily dependent on their availability and affordability. This could be achieved when cheap materials are actively employed as starting materials for nanomaterials synthesis. In this study, waste corn cob char was used as support during the [...] Read more.
The future and continuity of nanomaterials are heavily dependent on their availability and affordability. This could be achieved when cheap materials are actively employed as starting materials for nanomaterials synthesis. In this study, waste corn cob char was used as support during the preparation of the NiMo catalyst, and the effect of different char-activating techniques on the microstructure, yield and quality of carbon nanotubes (CNTs) obtained from waste polypropylene (PP) plastics using the chemical vapor deposition (CVD) technique was investigated. Properties of the catalysts and obtained nanomaterials were evaluated by XRD, SEM, N2 physisorption experiment, FTIR, Raman spectroscopy and TEM. Results showed improved surface properties of the NiMo catalyst supported on chemically (NiMo/ACX) and physically activated char (NiMo/ACT) compared to the NiMo catalyst supported on non-activated char (NiMo/AC0). High-quality CNTs were deposited over NiMo/ACT compared to NiMo/ACX and NiMo/AC0. It was also observed that different activation methods resulted in the formation of CNTs of different microstructures and yield. Optimum yield (470.0 mg CNTs/g catalyst) was obtained with NiMo/AC0, while NiMo/ACT gave the least product yield (70.0 mg CNTs/g catalyst) of the as-produced nanomaterials. Based on the results of the analysis, it was concluded that utilizing a cheap pyrogenic product of waste corn cob as a catalyst support in a bimetallic NiMo catalyst could offer a promising approach to mass producing CNTs and as a low-cost alternative in CNTs production from waste plastics. Full article
(This article belongs to the Special Issue Advances in Polymer Recycling)
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