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Polymers
Special Issues
State-of-the-Art Polymer Science and Technology in Korea (2022,2023)
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State-of-the-Art Polymer Science and Technology in Korea (2022,2023)

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 7180

Special Issue Editors

Prof. Dr. Il Kim

E-Mail Website
Guest Editor
School of Chemical Engineering, Pusan National University, Busandaehag-ro 63-2, Busan 46241, Republic of Korea
Interests: polymer synthesis; polymerization catalysis; bionanotechnology; hyperbranched polymers; polypeptides; thermoplastic elastomers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hyeonseok Yoon

E-Mail Website
Guest Editor
1. School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
2. Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
Interests: conducting polymers; nanoparticles; composites; sensors; electrochemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Polymer Society of Korea was founded by 180 attendants on October 8, 1976. About 200 members participated in the first annual meeting to present 19 papers. As of today, the society consists of 4 local sections, an advisory council, 7 operation committees, and officers (including a president, a chief vice president, 5 vice presidents, 2 auditors, a managing director, a general director, 49 ordinary directors, and 22 operating directors). There are now 4,500 total members of the society. In 2019, more than 4,000 members participated in the biannual meetings and more than 2,000 papers were presented. The Polymer Society of Korea aims to contribute to the development and propagation of science and technology of polymer-related chemistry, physics, biology, and engineering; thereby, the Polymer Society of Korea aims to promote polymer science and the polymer industry. The field of polymer science represents one of the most active and multidisciplinary research areas in Korea. Material scientists, chemists, physicists, and engineers are committed to promoting the scientific and technological advancement of polymer materials through a variety of research and development efforts at the service of the Polymer Society of Korea. This field includes polymer synthesis, functional polymers, polymer processing/composites, polymer structures and properties, molecular electronics, biomedical polymers, colloid and molecular assembly, and elastomer and fiber technologies. Examples of the contributions of Korean research to the field of polymer science can be easily found throughout global top journals and conferences.

This Special Issue is devoted to the development of polymer science research in Korea. It seeks to compile original articles, review articles, and state-of-the-art research papers. Research topics which will be considered for publication include, but are not limited to, the following:

  • Polymer synthesis;
  • Functional polymers;
  • Polymer processing/composites;
  • Polymer structures and properties;
  • Molecular electronics;
  • Biomedical polymers;
  • Colloid and molecular assembly;
  • Elastomers and fibers.

The only restriction for this Special Issue is that the main part of the study has to have been conducted in Korea or by Korean researchers.

We are expecting that this Special Issue will reflect the state of polymeric research in Korea and offer the rest of the world a bright insight into the progress that is being achieved in this field in Korea. 

Prof. Dr. Il Kim
Prof. Dr. Hyeonseok Yoon
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 synthesis
  • functional polymers
  • polymer processing/composites
  • polymer structure and property
  • molecular electronics
  • biomedical polymers
  • colloid and molecular assembly
  • elastomers and fibers

Published Papers (4 papers)

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Research

12 pages, 1324 KiB  
Article
Biomass- and Carbon Dioxide-Derived Polyurethane Networks for Thermal Interface Material Applications
by Ji Won Jang, Inhwan Cha, Junhyeon Choi, Jungwoo Han, Joon Young Hwang, Il Gyu Cho, Seung Uk Son, Eun Joo Kang and Changsik Song
Polymers 2024, 16(2), 177; https://doi.org/10.3390/polym16020177 - 07 Jan 2024
Viewed by 919
Abstract
Recent environmental concerns have increased demand for renewable polymers and sustainable green resource usage, such as biomass-derived components and carbon dioxide (CO2). Herein, we present crosslinked polyurethanes (CPUs) fabricated from CO2- and biomass-derived monomers via a facile solvent-free ball [...] Read more.
Recent environmental concerns have increased demand for renewable polymers and sustainable green resource usage, such as biomass-derived components and carbon dioxide (CO2). Herein, we present crosslinked polyurethanes (CPUs) fabricated from CO2- and biomass-derived monomers via a facile solvent-free ball milling process. Furan-containing bis(cyclic carbonate)s were synthesized through CO2 fixation and further transformed to tetraols, denoted FCTs, by aminolysis and utilized in CPU synthesis. Highly dispersed polyurethane-based hybrid composites (CPU–Ag) were also manufactured using a similar ball milling process. Due to the malleability of the CPU matrix, enabled by transcarbamoylation (dynamic covalent chemistry), CPU-based composites are expected to present very low interfacial thermal resistance between the heat sink and heat source. The characteristics of the dynamic covalent bond (i.e., urethane exchange reaction) were confirmed by the results of dynamic mechanical thermal analysis and stress relaxation analysis. Importantly, the high thermal conductivity of the CPU-based hybrid material was confirmed using laser flash analysis (up to 51.1 W/m·K). Our mechanochemical approach enables the facile preparation of sustainable polymers and hybrid composites for functional application. Full article
(This article belongs to the Special Issue State-of-the-Art Polymer Science and Technology in Korea (2022,2023))
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20 pages, 5684 KiB  
Article
Sustainable Polycaprolactone Polyol-Based Thermoplastic Poly(ester ester) Elastomers Showing Superior Mechanical Properties and Biodegradability
by Jin-Hyeok Choi, Jeong-Jae Woo and Il Kim
Polymers 2023, 15(15), 3209; https://doi.org/10.3390/polym15153209 - 28 Jul 2023
Viewed by 1594
Abstract
Thermoplastic elastomers (TPEs) have attracted increasing attention for a wide variety of industrial and biomedical applications owing to their unique properties compared to those of traditional rubbers. To develop high-performance engineering TPEs and reduce the environmental pollution caused by plastic waste, α,ω-hydroxyl-terminated polycaprolactone [...] Read more.
Thermoplastic elastomers (TPEs) have attracted increasing attention for a wide variety of industrial and biomedical applications owing to their unique properties compared to those of traditional rubbers. To develop high-performance engineering TPEs and reduce the environmental pollution caused by plastic waste, α,ω-hydroxyl-terminated polycaprolactone (PCL) polyols with molecular weights of 1000–4200 g mol−1 and polydispersity index (Ð) of 1.30–1.88 are synthesized via the ring-opening polymerization of sustainable ε-caprolactone using a heterogeneous double metal cyanide catalyst. The resulting PCL polyols are employed as soft segments to produce thermoplastic poly(ester ester) elastomers and are compared to conventional thermoplastic poly(ether ester) elastomers prepared from polytetramethylene ether glycol (PTMEG). Notably, the PCL-based TPEs exhibit superior mechanical properties and biodegradability compared to PTMEG-based TPEs owing to their crystallinity and microphase separation behaviors. Accordingly, they have 39.7 MPa ultimate strength and 47.6% biodegradability, which are much higher than those of PTMEG-based TPEs (23.4 MPa ultimate strength and 24.3% biodegradability). The introduction of biodegradable PCLs demonstrates significant potential for producing biodegradable TPEs with better properties than polyether-derived elastomers. Full article
(This article belongs to the Special Issue State-of-the-Art Polymer Science and Technology in Korea (2022,2023))
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16 pages, 8236 KiB  
Article
Critical Role of Non-Halogenated Solvent Additives in Eco-Friendly and Efficient All-Polymer Solar Cells
by Saeah Kim, Huijeong Choi, Myeongjae Lee, Hyeseung Jung, Yukyung Shin, Seul Lee, Kyungkon Kim, Myung Hwa Kim, Kyungwon Kwak and BongSoo Kim
Polymers 2023, 15(6), 1354; https://doi.org/10.3390/polym15061354 - 08 Mar 2023
Cited by 3 | Viewed by 1728
Abstract
Organic solar cells (OSCs) demonstrating high power conversion efficiencies have been mostly fabricated using halogenated solvents, which are highly toxic and harmful to humans and the environment. Recently, non-halogenated solvents have emerged as a potential alternative. However, there has been limited success in [...] Read more.
Organic solar cells (OSCs) demonstrating high power conversion efficiencies have been mostly fabricated using halogenated solvents, which are highly toxic and harmful to humans and the environment. Recently, non-halogenated solvents have emerged as a potential alternative. However, there has been limited success in attaining an optimal morphology when non-halogenated solvents (typically o-xylene (XY)) were used. To address this issue, we studied the dependence of the photovoltaic properties of all-polymer solar cells (APSCs) on various high-boiling-point non-halogenated additives. We synthesized PTB7-Th and PNDI2HD-T polymers that are soluble in XY and fabricated PTB7-Th:PNDI2HD-T-based APSCs using XY with five additives: 1,2,4-trimethylbenzene (TMB), indane (IN), tetralin (TN), diphenyl ether (DPE), and dibenzyl ether (DBE). The photovoltaic performance was determined in the following order: XY + IN < XY + TMB < XY + DBE ≤ XY only < XY + DPE < XY + TN. Interestingly, all APSCs processed with an XY solvent system had better photovoltaic properties than APSCs processed with chloroform solution containing 1,8-diiodooctane (CF + DIO). The key reasons for these differences were unraveled using transient photovoltage and two-dimensional grazing incidence X-ray diffraction experiments. The charge lifetimes of APSCs based on XY + TN and XY + DPE were the longest, and their long lifetime was strongly associated with the polymer blend film morphology; the polymer domain sizes were in the nanoscale range, and the blend film surfaces were smoother, as the PTB7-Th polymer domains assumed an untangled, evenly distributed, and internetworked morphology. Our results demonstrate that the use of an additive with an optimal boiling point facilitates the development of polymer blends with a favorable morphology and can contribute to the widespread use of eco-friendly APSCs. Full article
(This article belongs to the Special Issue State-of-the-Art Polymer Science and Technology in Korea (2022,2023))
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10 pages, 4194 KiB  
Article
Highly Flexible Triboelectric Nanogenerator Using Porous Carbon Nanotube Composites
by Jaehee Shin, Sungho Ji, Hanchul Cho and Jinhyoung Park
Polymers 2023, 15(5), 1135; https://doi.org/10.3390/polym15051135 - 24 Feb 2023
Cited by 4 | Viewed by 2006
Abstract
The rapid development of portable and wearable electronic devices has led researchers to actively study triboelectric nanogenerators (TENGs) that can provide self-powering capabilities. In this study, we propose a highly flexible and stretchable sponge-type TENG, named flexible conductive sponge triboelectric nanogenerator (FCS-TENG), which [...] Read more.
The rapid development of portable and wearable electronic devices has led researchers to actively study triboelectric nanogenerators (TENGs) that can provide self-powering capabilities. In this study, we propose a highly flexible and stretchable sponge-type TENG, named flexible conductive sponge triboelectric nanogenerator (FCS-TENG), which consists of a porous structure manufactured by inserting carbon nanotubes (CNTs) into silicon rubber using sugar particles. Nanocomposite fabrication processes, such as template-directed CVD and ice freeze casting methods for fabricating porous structures, are very complex and costly. However, the nanocomposite manufacturing process of flexible conductive sponge triboelectric nanogenerators is simple and inexpensive. In the tribo-negative CNT/silicone rubber nanocomposite, the CNTs act as electrodes, increasing the contact area between the two triboelectric materials, increasing the charge density, and improving charge transfer between the two phases. Measurements of the performance of flexible conductive sponge triboelectric nanogenerators using an oscilloscope and a linear motor, under a driving force of 2–7 N, show that it generates an output voltage of up to 1120 V and a current of 25.6 µA. In addition, by using different weight percentages of carbon nanotubes (CNTs), it is shown that the output power increases with the weight percentage of carbon nanotubes (CNTs). The flexible conductive sponge triboelectric nanogenerator not only exhibits good performance and mechanical robustness but can also be directly used in light-emitting diodes connected in series. Furthermore, its output remains extremely stable even after 1000 bending cycles in an ambient environment. In sum, the results demonstrate that flexible conductive sponge triboelectric nanogenerators can effectively power small electronics and contribute to large-scale energy harvesting. Full article
(This article belongs to the Special Issue State-of-the-Art Polymer Science and Technology in Korea (2022,2023))
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