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Polymers
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Advanced Epoxy-Based Materials, 5th Edition
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Advanced Epoxy-Based Materials, 5th Edition

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

Deadline for manuscript submissions: 31 August 2025 | Viewed by 2812

Special Issue Editor

Prof. Dr. Keon-Soo Jang

E-Mail Website1 Website2
Guest Editor
Department of Polymer Engineering, School of Chemical and Materials Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong 18323, Republic of Korea
Interests: functional epoxy resins for electronics packaging; extrusion; polymer composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Epoxy resins are utilized extensively in electronic applications due to their beneficial properties, such as excellent adhesion, low shrinkage, low dielectric constant, and outstanding mechanical and thermal properties. Advanced epoxy-based materials may include metal/epoxy, carbon-based fillers/epoxy, inorganic materials/epoxy, epoxy/polymeric materials, and fiber-reinforced epoxy composites. Advanced epoxy-based materials offer an extensive range of applications, such as adhesives for electronic devices, bio-based epoxy resins, paints/coatings, wind turbine composites, automotive/aerospace composites, and other adhesives for numerous applications. This Special Issue is highly motivated by the scope of utilization of advanced epoxy-based materials and will pay significant attention to novel synthetic methods, compositions, functionalization/modification, structure–property relationships, and biomedical and energy applications.

Considering your prominent contributions to this field, I would like to cordially invite you to submit an article to this Special Issue. This Special Issue will publish full research papers, communications, and review articles. I would like to compile a collection of comprehensive reviews from leading experts and up-to-date research from notable groups in the community.

Manuscripts can be submitted now or up until the deadline, and will be published on an ongoing basis. I would greatly appreciate your contribution to this Special Issue.

Prof. Dr. Keon-Soo Jang
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

  • thermoset polymers
  • epoxy composites
  • nanocomposites
  • synthesis
  • functionalization
  • characterization
  • electronic packaging
  • automotive
  • aerospace

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Related Special Issues

Published Papers (3 papers)

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Research

24 pages, 4250 KiB  
Article
Interactions and Curing Dynamics Between UV-Triggered Epoxy Acrylate Binder, Curing Agents and Photoinitiators
by Ji-min Choi, Sang Jang and Keon-Soo Jang
Polymers 2025, 17(9), 1252; https://doi.org/10.3390/polym17091252 - 4 May 2025
Viewed by 323
Abstract
This study investigated the interaction between UV-triggered curing binders and photoinitiators, focusing on their thermal, mechanical, and morphological properties. Using epoxy acrylate as the matrix and three potential photoinitiators with varying phosphorus contents, UV curing systems were fabricated and analyzed. 2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP), 2,4,6-trimethyl [...] Read more.
This study investigated the interaction between UV-triggered curing binders and photoinitiators, focusing on their thermal, mechanical, and morphological properties. Using epoxy acrylate as the matrix and three potential photoinitiators with varying phosphorus contents, UV curing systems were fabricated and analyzed. 2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP), 2,4,6-trimethyl benzoyl diphenyl phosphine oxide (TPO), and their mixture were utilized as photoinitiators. We observed that the curing process significantly reduced residual double bonds within the first 5 s of UV irradiation time. The glass transition temperature (Tg) increased with curing time due to enhanced network density. For instance, in the MyA–TPO formulation, Tg of the cured sample tended to increase to 67.3 °C for 3 s to 79.8 °C for 15 s. Mechanical analysis revealed that HMPP facilitated the formation of robust network structures. Notably, the MyA–HMPP formulation exhibited a tensile strength of 63 MPa and a Young’s modulus of 21 MPa, indicating excellent mechanical strength. SEM imaging confirmed these findings, illustrating distinct fracture morphologies that correlated with mechanical performance. These results provide insights into optimizing UV-curable materials for applications requiring high precision and durability. In particular, the combination of high Tg, superior tensile strength, and uniform fracture morphology indicates excellent thermal stability, mechanical integrity, and crack resistance—critical requirements in semiconductor packaging. These properties, along with rapid UV curing, support the suitability of the proposed systems for advanced applications such as system-in-package (SiP) and 3D integration. Full article
(This article belongs to the Special Issue Advanced Epoxy-Based Materials, 5th Edition)
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13 pages, 7145 KiB  
Article
Mechanical Performance of Cellulose Nanocrystal and Bioceramic-Based Composites for Surgical Training
by Hee-Chang Jeon and Young-Seong Kim
Polymers 2024, 16(19), 2849; https://doi.org/10.3390/polym16192849 - 9 Oct 2024
Cited by 1 | Viewed by 1088
Abstract
This study evaluated the mechanical performance of a cellulose nanocrystal (CNC)-based composite, consisting of hydroxyapatite and natural fibers, mimicking the mechanical properties of real bone. The effect of natural nanofibers on the cutting force of the composite was evaluated for suitability in surgical [...] Read more.
This study evaluated the mechanical performance of a cellulose nanocrystal (CNC)-based composite, consisting of hydroxyapatite and natural fibers, mimicking the mechanical properties of real bone. The effect of natural nanofibers on the cutting force of the composite was evaluated for suitability in surgical training. Although hydroxyapatite has been extensively studied in bone-related applications, the exploration of epoxy-based composites incorporating both hydroxyapatite and CNC represents a novel approach. The evaluation involved a load cell with an oscillating saw. The uniform distribution of CNCs within the composite was assessed using 3D X-ray imaging. The cutting force was found to be 4.005 ± 0.5469 N at a feed rate of 0.5 mm/s, comparable to that required when cutting real bone with the osteon at 90°. The 90-degree orientation of the osteon aligns with the cutting direction of the oscillating saw when performing knee replacements on the tibia and femur bones. The addition of CNCs resulted in changes in fracture toughness, leading to increased material fragmentation and surface irregularities. Furthermore, the change in the cutting force with depth was similar to that of real bone. The developed composite material enables bone-cutting surgeries using bioceramics and natural fibers without the risks associated with cadavers or synthetic fibers. Mold-based computed tomography data allows for the creation of various bone forms, enhancing skill development for surgeons. Full article
(This article belongs to the Special Issue Advanced Epoxy-Based Materials, 5th Edition)
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Graphical abstract

16 pages, 2608 KiB  
Article
Size Effects in Climatic Aging of Epoxy Basalt Fiber Reinforcement Bar
by Anna A. Gavrilieva, Oleg V. Startsev, Mikhail P. Lebedev, Anatoly S. Krotov, Anatoly K. Kychkin and Irina G. Lukachevskaya
Polymers 2024, 16(18), 2550; https://doi.org/10.3390/polym16182550 - 10 Sep 2024
Cited by 1 | Viewed by 826
Abstract
The purpose of this study was to obtain information on the influence of the size factor on the climatic aging of circular fiber plastics produced by pultrusion. The kinetics of moisture transfer was obtained in humidification and drying modes at 60 °C in [...] Read more.
The purpose of this study was to obtain information on the influence of the size factor on the climatic aging of circular fiber plastics produced by pultrusion. The kinetics of moisture transfer was obtained in humidification and drying modes at 60 °C in samples of epoxy basalt fiber reinforcement bars: after 28 months of exposure in the extremely cold climate of Yakutsk and 30 months of exposure in the moderately warm climate of Gelendzhik. It was shown that the 2D Langmuir model adequately describes the kinetics. The diffusion coefficients in the reinforcement direction for bars with diameters of 6, 8, 10, 16 and 20 mm turned out to be significantly higher than in the radial direction. To clarify the aging mechanism of the bars and the tensile, compressive and bending strength, the coefficient of linear thermal expansion and the glass transition temperature of the epoxy matrix of the bars with a diameter of 6, 8 and 10 mm after 51 months of exposure in Yakutsk and 54 months of exposure in Gelendzhik were measured. It was shown that after climatic exposure, the deformability of the bars decreased with increasing diameter of the bar; the glass transition temperature increased more significantly in the bar with a smaller diameter. In 6 mm diameter bars, the compressive and bending strength limits decreased by 10–25 % due to the plasticizing effect of moisture. With the same depth of moisture penetration into the volume of the samples, its effect on the strength of thin bars was significant, and for thick bars, it was insignificant. An increase in the glass transition temperature by 6 °C, associated with the additional curing of the polymer matrix, occurred in the surface layer of the epoxy basalt fiber reinforcement bars and was revealed in bars with a smaller diameter. Full article
(This article belongs to the Special Issue Advanced Epoxy-Based Materials, 5th Edition)
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