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Development in Epoxy Polymers

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

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 924

Special Issue Editor


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Guest Editor
Laboratory of Organic Chemistry, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Ibn Tofail University, Kénitra, Morocco
Interests: polymer synthesis; epoxy polymers and their composites; epoxy nanocomposites; bio-based epoxy resins; application of epoxy polymers; degradation of epoxy polymers; environmental impact of epoxy polymers; toxicity of epoxy polymers; textiles dyes; polymers membranes; wastewaters

Special Issue Information

Dear Colleagues,

Epoxy polymers or polyepoxides are resins that are used in almost every aspect of everyday life; they have become necessary in the automotive, aeronautical, marine, paint, coating, adhesive, semiconductor encapsulant, composite, and construction industries. The diversity of their applications is based on the interesting properties they possess, such as chemical and mechanical resistance, toughness, and dimensional stability. Epoxy monomers feature three-membered rings consisting of an oxygen atom linked with single bonds to two adjacent carbon atoms.

Generally speaking, they have at least two epoxide functions, whereas single-function epoxide compounds are used as reactive diluents. This makes their development by researchers, scientists, and industrialists necessary to meet users’ needs.

This Special Issue will focus on the current state of renewable, recycled, and bio-based epoxy polymers, as well as their development, preparation, and characterization methods, epoxy polymer application and degradation, and environmental impact.

Chapters and articles are sought on the results of research regarding the design, development, characterization, application, and degradation of new epoxy polymers, namely polyester epoxies, epoxy resins and their composites, bio-based epoxy resins, epoxy nanocomposites, etc.

Dr. Mohamed Berradi
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

  • epoxy polymers
  • polyester epoxies
  • epoxy resins and their composites
  • formulation of new epoxy resins
  • bio-based epoxy resins
  • epoxy nanocomposites
  • application of epoxy polymers
  • degradation of epoxy polymers
  • environmental impact of epoxy polymers
  • toxicity of epoxy polymers

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Published Papers (1 paper)

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Research

14 pages, 3309 KiB  
Article
Self-Toughened Epoxy Resin via Hybridization of Structural Isomeric Curing Agents
by Woong Kwon, Jiyeon Cheon, Hei Je Jeong, Jong Sung Won, Byeong-Joo Kim, Man Young Lee, Seung Geol Lee and Euigyung Jeong
Polymers 2025, 17(5), 695; https://doi.org/10.3390/polym17050695 - 5 Mar 2025
Viewed by 666
Abstract
Fracture toughness is a key property of epoxy resins with a high glass transition temperature (Tg), used in carbon fiber/epoxy composites for aerospace applications. Conventional toughening methods rely on adding toughening agents, often compromising the processibility and thermal stability. This study [...] Read more.
Fracture toughness is a key property of epoxy resins with a high glass transition temperature (Tg), used in carbon fiber/epoxy composites for aerospace applications. Conventional toughening methods rely on adding toughening agents, often compromising the processibility and thermal stability. This study introduces a simple self-toughening approach that enhances the fracture toughness without sacrificing other properties by controlling the cured epoxy network structure. Tetraglycidyl 4,4′-diaminodiphenylmethane (TGDDM) epoxy resin was cured using mixtures of structural isomeric curing agents, 3,3′- and 4,4′-diaminodiphenyl sulfone (3,3′- and 4,4′-DDS), at ratios of 7:3, 5:5, and 3:7. The optimal 7:3 ratio produced a resin with 30% higher fracture toughness compared to TGDDM/3,3′-DDS and 100% higher than the TGDDM/4,4′-DDS system. The Tg of the self-toughened resin ranged from 241 to 266 °C, which was intermediate between the Tg values of the TGDDM/3,3′-DDS and TGDDM/4,4′-DDS systems. This improvement is attributed to the higher crosslink density and reduced free volume of the epoxy network. These findings demonstrate that simply mixing isomeric curing agents enables self-toughening, providing a practical and efficient strategy to enhance the performance of high-Tg epoxy resins in advanced composite applications. Full article
(This article belongs to the Special Issue Development in Epoxy Polymers)
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