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Polymers
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Mechanical and Dynamic Characterization of Polymeric Composites II
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Mechanical and Dynamic Characterization of Polymeric Composites II

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

Deadline for manuscript submissions: 30 June 2024 | Viewed by 4301

Special Issue Editors

Dr. Mei-Chen Lin

E-Mail Website
Guest Editor
Department of Biomedical Engineering, College of Biomedical Engineering, China Medical University, Taichung 40447, Taiwan
Interests: fiber and functional textiles; polymer matrix composite materials; artificial medical materials; nanocomposites
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Limin Bao

E-Mail Website
Guest Editor
Interdisciplinary Graduate School of Science and Technology, Shinshu University, Nagano Prefecture 390-8621, Japan
Interests: green composite materials; carbon fiber composite materials; mechanical properties of composite materials (stretching, puncture and three-point bending, etc.); mechanical analysis simulation systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Further to the success of the Special Issue of Polymers “Mechanical and Dynamic Characterization of Polymeric Composites”, we are delighted to reopen the Special Issue, now entitled “Mechanical and Dynamic Characterization of Polymeric Composites II”.

The development of composite materials, which could be made of thermosetting or thermoplastic polymers after reinforcement, is diversified because they are used in many applications and exhibit strong performance. This Special Issue on “Mechanical and Dynamic Characterization of Polymeric Composites” is mainly in the fields of composite materials engineering and scientific studies. Innovative research based on the various mechanical properties of composite materials and dynamic analysis is invited. The research content of the studies includes purpose and innovation, material production and processing, reinforcement methods, and the theory of composite materials combined with multiple materials. We look forward to making breakthroughs in the field of composite materials and profound discussions and gains on the mechanical properties, processing methods, and application discussions of composite materials.

Dr. Mei-Chen Lin
Prof. Dr. Limin Bao
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 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

  • polymer matrix
  • composite materials
  • mechanical
  • dynamic analysis
  • strength
  • fiber
  • modulus
  • resin
  • nanocomposites
  • fabrication
  • manufacture

Published Papers (4 papers)

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Research

15 pages, 14264 KiB  
Article
The Synergistic Effect of Carbon Black/Carbon Nanotube Hybrid Fillers on the Physical and Mechanical Properties of EPDM Composites after Exposure to High-Pressure Hydrogen Gas
by Hyunmin Kang, Jongwoo Bae, Jinhyok Lee, Yumi Yun, Sangkoo Jeon, Nakkwan Chung, Jaekap Jung, Unbong Baek, Jihun Lee, Yewon Kim and Myungchan Choi
Polymers 2024, 16(8), 1065; https://doi.org/10.3390/polym16081065 - 11 Apr 2024
Viewed by 345
Abstract
This study investigated the synergistic effect of carbon black/multi-wall carbon nanotube (CB/MWCNT) hybrid fillers on the physical and mechanical properties of Ethylene propylene diene rubber (EPDM) composites after exposure to high-pressure hydrogen gas. The EPDM/CB/CNT hybrid composites were prepared by using the EPDM/MWCNT [...] Read more.
This study investigated the synergistic effect of carbon black/multi-wall carbon nanotube (CB/MWCNT) hybrid fillers on the physical and mechanical properties of Ethylene propylene diene rubber (EPDM) composites after exposure to high-pressure hydrogen gas. The EPDM/CB/CNT hybrid composites were prepared by using the EPDM/MWCNT master batch (MB) with 10 phr CNTs to enhance the dispersion of CNTs in hybrid composites. The investigation included a detailed analysis of cure characteristics, crosslink density, Payne effect, mechanical properties, and hydrogen permeation properties. After exposure to 96.3 MPa hydrogen gas, the hydrogen uptake and the change in volume and mechanical properties of the composites were assessed. We found that as the MWCNT volume fraction in fillers increased, the crosslink density, filler–filler interaction, and modulus of hybrid composites increased. The hydrogen uptake and the solubility of the composites decreased with an increasing MWCNT volume fraction in fillers. Moreover, after exposure to hydrogen gas, the change in volume and mechanical properties exhibited a diminishing trend with a higher MWCNT volume fraction. We conclude that the hybridization of CB and CNTs formed strong filler–filler networks in hybrid composites, consequently reinforcing the EPDM composites and enhancing the barrier properties of hydrogen gas. Full article
(This article belongs to the Special Issue Mechanical and Dynamic Characterization of Polymeric Composites II)
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12 pages, 10225 KiB  
Article
Tensile and Interfacial Mechanical Properties for Single Aramid III Fibers under Dynamic Loading
by Fu Liu, Fangfang Li, Xuelei Li, Haobin Tian and Xudong Lei
Polymers 2024, 16(6), 804; https://doi.org/10.3390/polym16060804 - 13 Mar 2024
Viewed by 504
Abstract
In this study, the traditional mini split Hopkinson tension bar (SHTB) was enhanced for the dynamic mechanical performance testing of single fiber/resin interface of composites. Single Aramid III fibers were modified using a polyamine modification treatment. Quasi-static and dynamic tensile tests of modified [...] Read more.
In this study, the traditional mini split Hopkinson tension bar (SHTB) was enhanced for the dynamic mechanical performance testing of single fiber/resin interface of composites. Single Aramid III fibers were modified using a polyamine modification treatment. Quasi-static and dynamic tensile tests of modified single Aramid III fibers were conducted using an electronic tensile testing machine and mini SHTB. The test results indicated that the surface modification employing the Catechol-Tetraethylenepentamine (Cat-TEPA) approach had a negligible effect on the tensile mechanical properties of single Aramid III fibers. The microdroplet method was introduced to measure the dynamic interfacial shear strength (IFSS) of Aramid III fiber/waterborne polyurethane resin using a mini SHTB. The dynamic shear test results revealed an increase in the dynamic shear strength of the modified Aramid III fiber/resin interface from 36.16 MPa to 41.51 MPa. Furthermore, the Scanning Electron Microscope (SEM) photography of the modified single Aramid III fiber after debonding exhibited regular grid structures on the debonding area, which can prevent debonding between the single fiber and the microdroplet, thereby enhancing interfacial shear performance. Full article
(This article belongs to the Special Issue Mechanical and Dynamic Characterization of Polymeric Composites II)
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21 pages, 9867 KiB  
Article
Role of Bio-Based and Fossil-Based Reactive Diluents in Epoxy Coatings with Amine and Phenalkamine Crosslinker
by Pieter Samyn, Joey Bosmans and Patrick Cosemans
Polymers 2023, 15(19), 3856; https://doi.org/10.3390/polym15193856 - 22 Sep 2023
Cited by 1 | Viewed by 1105
Abstract
The properties of epoxy can be adapted depending on the selection of bio-based diluents and crosslinkers to balance the appropriate viscosity for processing and the resulting mechanical properties for coating applications. This work presents a comprehensive study on the structure–property relationships for epoxy [...] Read more.
The properties of epoxy can be adapted depending on the selection of bio-based diluents and crosslinkers to balance the appropriate viscosity for processing and the resulting mechanical properties for coating applications. This work presents a comprehensive study on the structure–property relationships for epoxy coatings with various diluents of mono-, di-, and bio-based trifunctional glycidyl ethers or bio-based epoxidized soybean oil added in appropriate concentration ranges, in combination with a traditional fossil-based amine or bio-based phenalkamine crosslinker. The viscosity of epoxy resins was already reduced for diluents with simple linear molecular configurations at low concentrations, while higher concentrations of more complex multifunctional diluents were needed for a similar viscosity reduction. The curing kinetics were evaluated through the fitting of data from differential scanning calorimetry to an Arrhenius equation, yielding the lowest activation energies for difunctional diluents in parallel with a balance between viscosity and reactivity. While the variations in curing kinetics with a change in diluent were minor, the phenalkamine crosslinkers resulted in a stronger decrease in activation energy. For cured epoxy resins, the glass transition temperature was determined as an intrinsic parameter that was further related to the mechanical coating performance. Considerable effects of the diluents on coating properties were investigated, mostly showing a reduction in abrasive wear for trifunctional diluents in parallel with the variations in hardness and ductility. The high hydrophobicity for coatings with diluents remained after wear and provided good protection. In conclusion, the coating performance could be related to the intrinsic mechanical properties independently of the fossil- or bio-based origin of diluents and crosslinkers, while additional lubricating properties are presented for vegetable oil diluents. Full article
(This article belongs to the Special Issue Mechanical and Dynamic Characterization of Polymeric Composites II)
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28 pages, 11506 KiB  
Article
Polyamide 11 Composites Reinforced with Diatomite Biofiller—Mechanical, Rheological and Crystallization Properties
by Marta Dobrosielska, Renata Dobrucka, Dariusz Brząkalski, Paulina Kozera, Agnieszka Martyła, Ewa Gabriel, Krzysztof J. Kurzydłowski and Robert E. Przekop
Polymers 2023, 15(6), 1563; https://doi.org/10.3390/polym15061563 - 21 Mar 2023
Cited by 1 | Viewed by 1438
Abstract
Amorphic diatomaceous earth is derived from natural sources, and polyamide 11 (PA11) is produced from materials of natural origin. Both of these materials show a low harmfulness to the environment and a reduced carbon footprint. This is why the combination of these two [...] Read more.
Amorphic diatomaceous earth is derived from natural sources, and polyamide 11 (PA11) is produced from materials of natural origin. Both of these materials show a low harmfulness to the environment and a reduced carbon footprint. This is why the combination of these two constituents is beneficial not only to improve the physicochemical and mechanical properties of polyamide 11 but also to produce a biocomposite. For the purpose of this paper, the test biocomposite was produced by combining polyamide 11, as well as basic and pre-fractionated diatomaceous earth, which had been subjected to silanization. The produced composites were used to carry out rheological (melt flow rate-MFR), mechanical (tensile strength, bending strength, impact strength), crystallographic (X-ray Diffraction-XRD), thermal and thermo-mechanical (differential scanning calorimetry–DSC, dynamic mechanical thermal analysis–DMTA) analyses, as well as a study of hydrophobic–hydrophilic properties of the material surface (wetting angle) and imaging of the surface of the composites and the fractured specimens. The tests showed that the additive 3-aminopropyltriethoxysilane (APTES) acted as an agent that improved the elasticity of composites and the melt flow rate. In addition, the produced composites showed a hydrophilic surface profile compared to pure polylactide and polyamide 11. Full article
(This article belongs to the Special Issue Mechanical and Dynamic Characterization of Polymeric Composites II)
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