Special Issue "Dynamic Chemistry in Polymer Science"

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

Deadline for manuscript submissions: 31 October 2019.

Special Issue Editors

Guest Editor
Dr. Fernando Ruipérez Website E-Mail
POLYMAT, University of the Basque Country UPV/EHU
Interests: computational chemistry; self-healing materials; dynamic chemistry; non-covalent interactions; reaction mechanisms; excited states
Guest Editor
Dr. Jon M. Matxain Website E-Mail
University of the Basque Country UPV/EHU and Donostia International Physics Center (DIPC)
Interests: theoretical chemistry; reaction mechanisms; excited states; self-healing materials; inorganic nanomaterials; polymer–nanomaterial interfaces

Special Issue Information

Dear Colleagues,

Dynamic chemistry plays an essential role in polymer science and engineering. The introduction of dynamic covalent and non-covalent bonds in polymer networks has yielded to the development of new materials with unique properties ascribed to the nature of the dynamic bond, such as reprocessing, recycling, controllable degradation, self-healing, and responsive capacity, to cite some. Research efforts carried out in this area will provide, in the near future, materials with smart functionalities that may enable the addressing of some 21st century challenges, such as energy and sustainability.

This Special Issue aims to provide an update on recent progress in developing materials using covalent and non-covalent reversible chemistries, including computational and experimental research works. Both original and review articles are welcome.

Dr. Fernando Ruipérez
Dr. Jon M. Matxain
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 papers will be 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 monthly 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 1500 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

  • Reversible chemistry
  • Covalent and non-covalent dynamic bonds
  • Responsive materials
  • Self-healing materials
  • Vitrimers
  • Computational chemistry

Published Papers (2 papers)

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Research

Open AccessArticle
Recyclable Self-Healing Polyurethane Cross-Linked by Alkyl Diselenide with Enhanced Mechanical Properties
Polymers 2019, 11(5), 773; https://doi.org/10.3390/polym11050773 - 01 May 2019
Abstract
Dynamic structures containing polymers can behave as thermosets at room temperature while maintaining good mechanical properties, showing good reprocessability, repairability, and recyclability. In this work, alkyl diselenide is effectively used as a dynamic cross-linker for the design of self-healing poly(urea–urethane) elastomers, which show [...] Read more.
Dynamic structures containing polymers can behave as thermosets at room temperature while maintaining good mechanical properties, showing good reprocessability, repairability, and recyclability. In this work, alkyl diselenide is effectively used as a dynamic cross-linker for the design of self-healing poly(urea–urethane) elastomers, which show quantitative healing efficiency at room temperature, without the need for any catalysts or external interventions. Due to the combined action of the urea bond and amide bond, the material has better mechanical properties. We also compared the self-healing effect of alkyl diselenide-based polyurethanes and alkyl disulfide-based polyurethanes. The alkyl diselenide has been incorporated into polyurethane networks using a para-substituted amine diphenyl alkyl diselenide. The resulting materials not only exhibit faster self-healing properties than the corresponding disulfide-based materials, but also show the ability to be processed at temperatures as low as 60 °C. Full article
(This article belongs to the Special Issue Dynamic Chemistry in Polymer Science)
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Open AccessArticle
Thermal Healing, Reshaping and Ecofriendly Recycling of Epoxy Resin Crosslinked with Schiff Base of Vanillin and Hexane-1,6-Diamine
Polymers 2019, 11(2), 293; https://doi.org/10.3390/polym11020293 - 10 Feb 2019
Cited by 1
Abstract
A bio-derived dihydroxylimine hardener, Van2HMDA, for the curing of epoxy resin was prepared from vanillin (Van) and hexamethylene-1,6-diamine (HMDA) by Schiff base formation. The epoxy resin of diglycidyl ether of bisphenol A was cured with Van2HMDA in the presence of the catalyst, 2-ethyl-4-methylimidazole [...] Read more.
A bio-derived dihydroxylimine hardener, Van2HMDA, for the curing of epoxy resin was prepared from vanillin (Van) and hexamethylene-1,6-diamine (HMDA) by Schiff base formation. The epoxy resin of diglycidyl ether of bisphenol A was cured with Van2HMDA in the presence of the catalyst, 2-ethyl-4-methylimidazole (EMI). The crosslinked epoxy resin showed thermal-healing properties at elevated temperatures. Moreover, the crosslinked epoxy resin can be reshaped by heating via imine metathesis of the hardener units. The imine metathesis of Van2HMDA was confirmed experimentally. Stress-relaxation properties of the epoxy resin crosslinked with Van2HMDA were investigated, and the activation energy obtained from Arrhenius plots of the relaxation times was 44 kJ/mol. The imine bonds in the epoxy polymer matrix did not undergo hydrolysis after immersing in water at room temperature for one week. However, in the presence of acid, the crosslinked polymer was easily decomposed due to the hydrolysis of imine bonds. The hydrolysis of imine bonds was used for the ecofriendly recycling of crosslinked polymer. It is inferred that thermal-healing, reshaping, and reprocessing properties can be implemented in the various crosslinked epoxy resins with the bio-derived dihydroxylimine hardener, albeit the recycled epoxy resin is of inevitably lower quality than the original material. Full article
(This article belongs to the Special Issue Dynamic Chemistry in Polymer Science)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title:       Self-healing Polyurethane Cross-linked by Alkyl Diselenide with Enhanced Mechanical Properties
Authors:  Jian Zhu, et al. (Soochow University, Suzhou, China)

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