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Polymers
Special Issues
Dynamic Covalent Polymers: Synthesis, Characterization, and Applications
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Dynamic Covalent Polymers: Synthesis, Characterization, and Applications

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

Deadline for manuscript submissions: closed (15 March 2024) | Viewed by 3837

Special Issue Editor

Prof. Dr. Toshihiko Matsumoto

E-Mail Website1 Website2
Guest Editor
Department of Industrial Chemistry, Graduate School of Engineering, Tokyo Polytechnic University, Atsugi, Kanagawa 243-0297, Japan
Interests: dynamic covalent chemistry; macrocycles; self-healing polymers; vitrimers; advanced polyimides for opto-electric devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Dynamic covalent bonds are ubiquitous in nature, and they are continuously being utilized in biotic settings to provide a wide range of functions, such as protein folding by reversible disulfide bonds and dynamic imine-based human vision. In the last decade, the application of dynamic covalent chemistry in the fields of polymeric materials and macrocyclic molecules has become the topic of an increasing number of studies. This is attributable to the fact that polymers containing dynamic functions possess a structure that affords recyclability, reprocessability, and peculiar self-healing properties inconceivable in traditional polymer networks. This Special Issue covers developments in the synthesis, characterization, and applications of dynamic covalent macrocycles and polymers.

Prof. Dr. Toshihiko Matsumoto
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.

Keywords

  • dynamic covalent networks
  • reversible covalent polymers
  • dynamic covalent macrocycles
  • vitrimers
  • reprocessability
  • chemical recyclability
  • self-healing

Published Papers (3 papers)

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Research

11 pages, 2809 KiB  
Article
Rapid Reassembly, Biomass-Derived Adhesive Based on Soybean Oil and Diels–Alder Bonds
by Zhiyong Liu, Zhiguo Song, Benrong Lv and Zumin Qiu
Polymers 2023, 15(22), 4428; https://doi.org/10.3390/polym15224428 - 16 Nov 2023
Cited by 1 | Viewed by 659
Abstract
Synthetic adhesives play a crucial role in holding together solid materials through interfacial interactions. Thermoplastic and thermosetting adhesives are important types of synthetic adhesives, with thermoplastic adhesives being reassemblable and thermosetting adhesives exhibiting high adhesive strength and creep resistance. However, there is a [...] Read more.
Synthetic adhesives play a crucial role in holding together solid materials through interfacial interactions. Thermoplastic and thermosetting adhesives are important types of synthetic adhesives, with thermoplastic adhesives being reassemblable and thermosetting adhesives exhibiting high adhesive strength and creep resistance. However, there is a need to combine the advantages of both types and develop high bonding strength, reassemblable adhesives. Here, epoxidized soybean oil (ESO) was used to prepare adhesive networks and Diels–Alder bonds were incorporated to enhance reassembly ability. The ESO was functionalized with furyl groups and cross-linked via the reaction between furyl and imide groups to involve the Diels–Alder bonds. The resulting adhesive exhibited good solvent resistance and mechanical properties, which could be regulated by adjusting the quantity of cross-linker. The prepared adhesives also demonstrated self-healing capabilities, as the scratch on the surface gradually diminished with heating. Additionally, the adhesives showed the ability to undergo recycling without significant changes in properties. The prepared adhesives exhibited hydrophilicity and the flow characteristics during reassembly were characterized by a decrease in torque. This study provides a promising approach for the development of synthetic adhesives with reassembly ability, which has important implications for the field of bonding. Full article
(This article belongs to the Special Issue Dynamic Covalent Polymers: Synthesis, Characterization, and Applications)
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17 pages, 6074 KiB  
Article
Highly Efficient One-Pot Synthesis of Hexakis(m-phenyleneimine) Macrocyle Cm6 and the Thermostimulated Self-Healing Property through Dynamic Covalent Chemistry
by Toshihiko Matsumoto
Polymers 2023, 15(17), 3542; https://doi.org/10.3390/polym15173542 - 25 Aug 2023
Cited by 1 | Viewed by 1101
Abstract
Highly efficient one-pot synthesis of hexakis(m-phenyleneimine) macrocycle Cm6 from acetalprotected AB-type monomer, m-aminobenzaldehyde diethylacetal, was successfully achieved based on imine dynamic covalent chemistry and precipitation-driven cyclization. The structure of Cm6 in the solid state was determined using CP/MAS NMR, X-ray [...] Read more.
Highly efficient one-pot synthesis of hexakis(m-phenyleneimine) macrocycle Cm6 from acetalprotected AB-type monomer, m-aminobenzaldehyde diethylacetal, was successfully achieved based on imine dynamic covalent chemistry and precipitation-driven cyclization. The structure of Cm6 in the solid state was determined using CP/MAS NMR, X-ray single crystallographic analysis, and WAXD. Macrocycle Cm6 is composed of six phenylene and imine bonds facing the same direction, with nitrogen atoms arranged on the outside of the ring, and has a chair conformation, as predicted from DFT calculation. The macrocycle forms π-stacked columnar aggregates and hexagonally closest-packed structure. The cyclization process was investigated using MALDI-TOF MS and NMR. A mechanism of precipitation-driven cyclization based on imine dynamic covalent chemistry and π-stacked columnar aggregation is proposed. Both the nature of imine linkage and the shape anisotropy of the macrocycle played an important role in the single one-pot synthesis. The water-mediated mutual conversion between macrocycle Cm6 and linear oligomers driven by thermal stimulation was analyzed using MALDI-TOF MS and GPC methods. Macrocycle Cm6 with a dynamic covalent imine bond exhibited self-healing properties when stimulated using heat. Full article
(This article belongs to the Special Issue Dynamic Covalent Polymers: Synthesis, Characterization, and Applications)
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16 pages, 4813 KiB  
Article
Innovative Device and Procedure for In Situ Quantification of the Self-Healing Ability and Kinetics of Self-Healing of Polymeric Materials
by Yuliet Paez-Amieva, Jaime Carpena-Montesinos and José Miguel Martín-Martínez
Polymers 2023, 15(9), 2152; https://doi.org/10.3390/polym15092152 - 30 Apr 2023
Cited by 2 | Viewed by 1749
Abstract
A new device and procedure for the in situ quantification of the extent of the self-healing and the kinetics of self-healing of polymeric materials were proposed. The device consisted of flowing an inert gas below the sample placed in a hermetically closed chamber. [...] Read more.
A new device and procedure for the in situ quantification of the extent of the self-healing and the kinetics of self-healing of polymeric materials were proposed. The device consisted of flowing an inert gas below the sample placed in a hermetically closed chamber. When the sample was perforated/damaged, the gas passed through the hole made in the polymeric material and the gas flow rate declined as the self-healing was produced. Once the gas flow rate stopped, the self-healing was completed. The proposed method was simple, quick, and reproducible, and several in situ self-healing experiments at different temperatures could be performed in the same sample. As a proof of concept, the new device and method have been used for measuring the self-healing ability of different polyurethanes. Full article
(This article belongs to the Special Issue Dynamic Covalent Polymers: Synthesis, Characterization, and Applications)
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