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Polymers
Special Issues
Electrical and Magnetic Properties of Polymers and Polymer Composites
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Electrical and Magnetic Properties of Polymers and Polymer Composites

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

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 5896

Special Issue Editors

Prof. Dr. Javier González-Benito

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Guest Editor
Department of Materials Science and Engineering and Chemical Engineering, Instituto de Química y Materiales Álvaro Alonso Barba (IQMAA), Universidad Carlos III de Madrid, Leganés, 28911 Madrid, Spain
Interests: design, preparation, and characterization of polymer-based multifunctional materials with (i) special electrical properties and (ii) antibacterial activity; characterization of polymers and composite materials; use of fluorescent probes and labels to monitor physico-chemical changes at a molecular scale; atomic force microscopy: nanothermodeformation (linear coefficients of thermal expansion of polymer thin films), nanopiezodeformación; FTIR (middle and near range): structural, dynamics, and aging phenomena studies; solution blow spinning
Special Issues, Collections and Topics in MDPI journals
Dr. Dania Olmos

E-Mail Website
Guest Editor
Department of Materials Science and Engineering and Chemical Engineering, Instituto de Químicay Materiales Álvaro Alonso Barba (IQMAA), Universidad Carlos III de Madrid, 28911 Leganés, Spain
Interests: nanocomposites; polymers; polymer nanocomposites; interphases and interfaces; characterization techniques
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

At present, more and more plastic materials with special electric and magnetic properties are being revealed as smart alternatives of other, more conventional materials such as ceramics or metals. In general, the reason for that lies behind the fact that these polymer-based materials are more versatile as they can generally be processed more easily, are lighter and, in many cases, provide other properties related to their resistance to chemical and physical attacks. Apart from polymers with intrinsic electric properties (conductive polymers such as polyacetylene or polypyrrole, electroactive polymers such as poly(vinylidene fluoride) and its copolymers), or intrinsic magnetic properties (new complex polymer building blocks which can lead to the formation of super-paramagnetic materials), polymer matrix composite materials may offer a wider range of properties depending not only on the nature of the fillers used but also on the composition. Attending the particular properties provided by polymer-based materials, the new world that can be opened in terms of applications is evident when special electrical and magnetic properties are required: sensors, actuators, thermistors, high k materials for supercapacitors, printed electronic circuits, and materials for energy harvesting and electromagnetic shielding applications, among others. For all this, this Special Issue is aimed at the preparation and characterization of new polymers and polymer-based materials with electric or magnetic properties.

Prof. Javier González-Benito
Dr. Dania Olmos
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

  • Electroactive polymers
  • Magnetic polymers
  • Conducting polymers
  • Electroluminescent polymers
  • Polymer nanocomposites

Published Papers (3 papers)

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Research

16 pages, 6097 KiB  
Article
Effect of Graphene/Spherical Graphite Ratio on the Properties of PLA/TPU Composites
by Zenghui Yang, Haihua Wu, Renjing Zhang, Kaixin Deng, Yan Li, Zhi Liu, Qiang Zhong and Yi Kang
Polymers 2022, 14(13), 2538; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14132538 - 22 Jun 2022
Cited by 13 | Viewed by 1559
Abstract
Wave-absorbing materials are developing in the direction of “light weight, wide frequency band, thin layer and high strength”, and it is difficult to achieve the synergy between wave-absorbing performance and mechanical properties when graphene absorbent is compounded with a single resin matrix. In [...] Read more.
Wave-absorbing materials are developing in the direction of “light weight, wide frequency band, thin layer and high strength”, and it is difficult to achieve the synergy between wave-absorbing performance and mechanical properties when graphene absorbent is compounded with a single resin matrix. In this paper, based on the preparation of a new composite absorbing wire with a graphene (GR)/spherical graphite (SG) double absorbent and polylactic acid (PLA)/thermoplastic polyurethane (TPU) double matrix, we proposed a new method to prepare samples for testing the electromagnetic parameters and tensile strength by fused deposition modeling (FDM). Furthermore, the effect of SG/GR ratio on the microwave absorbing properties and mechanical properties of PLA/TPU composites was specifically studied. It was found that when the ratio of SG/GR was small (0:5, 1:4), the dielectric loss (interfacial polarization loss, dipole polarization loss, conductivity loss) and attenuation ability of the composites were stronger, and the impedance matching was better. When the SG/GR ratio was large (5:0, 4:1), the composites had high strength and toughness. When the ratio of SG/GR was moderate (2:3, 3:2), it could retain the absorbing and mechanical properties of the absorbing materials. On the one hand, the SG and PLA/TPU matrix formed an “island structure”, which improves the dispersion of GR; on the other hand, the GR and PLA/TPU matrix formed a “core-shell structure”, which promotes polarization and multiple scattering. Full article
(This article belongs to the Special Issue Electrical and Magnetic Properties of Polymers and Polymer Composites)
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11 pages, 10576 KiB  
Article
Tactile Sensing Using Magnetic Foam
by Gildas Diguet, Joerg Froemel, Masanori Muroyama and Koichi Ohtaka
Polymers 2022, 14(4), 834; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14040834 - 21 Feb 2022
Cited by 5 | Viewed by 1755
Abstract
For biomedical applications, smart materials that are used as sensors or actuators have to match some criteria, especially bio-compatibility and softness. Smart polymers are candidates that fulfill these two criteria. A sensitivity to compression is created by adding magnetic particles to a compressible [...] Read more.
For biomedical applications, smart materials that are used as sensors or actuators have to match some criteria, especially bio-compatibility and softness. Smart polymers are candidates that fulfill these two criteria. A sensitivity to compression is created by adding magnetic particles to a compressible foam polymer. A foam-based composite is fabricated for its small Poisson’s ratio, which enables significant compression, up to 50%. This large compression induces a change in its magnetic properties, which can be detected using coils. By setting the sensing coils as a compact array of 3 × 3, the sensor successfully detected and localized an applied deformation. Full article
(This article belongs to the Special Issue Electrical and Magnetic Properties of Polymers and Polymer Composites)
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11 pages, 3760 KiB  
Article
Highly Enhancing Electrical, Thermal, and Mechanical Properties of Polypropylene/Graphite Intercalation Compound Composites by In Situ Expansion during Melt Mixing
by Zhifeng Wang, Jun Tong, Wei Li, Haichen Zhang, Manfeng Hu, Haichu Chen and Hui He
Polymers 2021, 13(18), 3095; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13183095 - 14 Sep 2021
Cited by 7 | Viewed by 1731
Abstract
Polypropylene/graphite intercalation compound (PP/GIC) composites are prepared via melt mixing at three different temperatures (180, 200, and 220 °C). The dispersion of GICs in the composites is clearly improved due to the increased interlamellar spacing caused by in situ expansion of GICs at [...] Read more.
Polypropylene/graphite intercalation compound (PP/GIC) composites are prepared via melt mixing at three different temperatures (180, 200, and 220 °C). The dispersion of GICs in the composites is clearly improved due to the increased interlamellar spacing caused by in situ expansion of GICs at higher temperatures, which facilitates the intercalation of PP molecular chains into the GIC galleries. As a result, the PP/GIC composite with 10 wt% GICs prepared at 220 °C (PG220) presents a dielectric constant of about 1.3 × 108 at 103 Hz, which is about six orders higher than that of the composite prepared at 180 °C (PG180). Moreover, the thermal conductivity of the PG220 sample (0.63 Wm−1K−1) is 61.5% higher than that of the PG180 sample. The well-dispersed GICs accelerates the crystallization of PP by increasing the nucleation point and enhances the thermal stability of the composites. The PG220 sample shows a Young’s modulus that is about 21.2% higher than that of the PG180 samples. The results provide an efficient approach for fabricating polymer/GIC composites without complex exfoliation and dispersion processes. Full article
(This article belongs to the Special Issue Electrical and Magnetic Properties of Polymers and Polymer Composites)
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