Article
Polymer Science
Florian Rothenhaeusler, Holger Ruckdaeschel
Summary: The study focuses on the glass transition temperature, viscosity, and latency of bio-based epoxy resins cured with L-arginine in the presence of a urea-based accelerator. The results show that the epoxy resins with the accelerator have low viscosity and sufficient latency, making them suitable for use as matrix materials in fiber-reinforced polymer composites.
Article
Polymer Science
Florian Rothenhaeusler, Holger Ruckdaeschel
Summary: The mechanical properties of the new bio-based thermoset Argopox were studied, showing that it possesses performance levels similar to materials already used as matrices for fiber reinforced composites.
Article
Chemistry, Multidisciplinary
Hafezeh Nabipour, Xin Wang, Lei Song, Yuan Hu
Summary: The study focused on the development of a fully bio-based epoxy thermoset from syringaldehyde and furfurylamine, which exhibited high glass transition temperature, mechanical strength, intrinsic flame resistance, and antibacterial properties. This bio-based epoxy thermoset showed superior performance compared to petroleum-based epoxy thermosets, making it a promising green substitute for high performance applications in fire safety.
Article
Polymer Science
Florian Rothenhaeusler, Holger Ruckdaeschel
Summary: The potential of amino acids as bio-based curing agents for epoxy resins was investigated by studying the mechanical properties of diglycidyl ether of bisphenol a (DGEBA) cured with different amino acids. The results showed that the choice of curing agent significantly influenced the glass transition temperature, Young's modulus, tensile strength, and critical stress intensity factor of the thermosets. The cross-link density of DGEBA cured with amino acids was found to have a crucial influence on the thermo-mechanical properties of the thermosets.
Article
Chemistry, Physical
Radoslaw Busiak, Anna Masek, Aleksandra Wegier, Adam Rylski
Summary: The presented research focuses on the mechanochemical modification of a snap-cure epoxy resin with the addition of cellulose for the production of a controlled-degradation material with potential application in rail transport. Various tests were conducted to evaluate the properties and performance of the cellulose-filled epoxy resin composites. The results showed that the addition of cellulose did not significantly affect the properties of the composites. This research aligns with the industry's pursuit of eco-friendly solutions and materials with a positive impact on the environment.
Article
Engineering, Environmental
Zizhao Qian, Yuanxiang Xiao, Xujun Zhang, Qing Li, Lujie Wang, Feiya Fu, Hongyan Diao, Xiangdong Liu
Summary: This study reports a novel amidation route to tailor diphenolic acid (DPA) and produce high-performance epoxy resins. Compared to the traditional bisphenol A (BPA), the amide-modified DPA showed lower toxicity and exhibited autocatalytic effect during curing reactions. Dynamic mechanical analyses and tensile test results confirmed the outstanding thermo-mechanical properties of the amide-modified DPA-derived epoxy resins, which can be attributed to increased cross-linking density and enhanced hydrogen bonding. Additionally, the amide-modified DPA derivatives also showed potential as excellent interfaces between the resin and cotton fibers, making them suitable for bio-based composite materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Dan Qian, Jiahai Zhou, Jieyuan Zheng, Jun Cao, Jintao Wan, Hong Fan
Summary: In this study, a new silicone-modified trifunctional epoxy monomer SITEUP was synthesized and successfully improved the toughness of epoxy. The modified epoxy thermosets showed increased impact strength, flexural strength, thermal stability, and damping characteristics. In addition, SITEUP also improved the surface properties of epoxy materials.
Article
Materials Science, Composites
Krishnakant Bhole, Neerakallu D. Shivakumar, Shakti Singh Chauhan, Sanketh Tonannavar
Summary: This research focused on the preparation and characterization of cellulose nano fibers (CNF) extracted from bamboo pulp using the TEMPO oxidation method. The CNF was utilized as a binder in the production of biocomposites, showing promising mechanical properties. The study demonstrated that CNF extracted from bamboo pulp can serve as a viable sole binder in the production of biocomposites.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Markus Schwaiger, Katharina Resch-Fauster
Summary: This work describes the development and characterization of mechanical flexible epoxy resins based on epoxidized vegetable oils and sebacic acid. The effects of different oil types and epoxy equivalent weight on the thermo-mechanical and mechanical properties of the resin were investigated. The results showed that the EVO type had a strong effect on the properties of the resin, while the EEW had no significant effect.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Junji Wei, Yajun Duan, Hao Wang, Wanping Zhang
Summary: In this study, DPAE was modified with DPR and CE to improve its dielectric properties while maintaining good heat resistance and low dimensional stability. Compared to DPAE resin, both DPAE/DPR and DPAE/CE composites exhibited higher glass transition temperatures, lower dielectric constants, lower loss tangents, and good compatibility with the two resins. Moreover, CE resin showed better modification effect on the thermal and dielectric properties of DPAE.
Article
Polymer Science
Iuliana Bejenari, Roxana Dinu, Sarah Montes, Irina Volf, Alice Mija
Summary: This study focuses on developing sustainable biocomposites based on epoxy bioresin reinforced with hydrochar, a natural porous material. Testing seven formulations, it was found that hydrochar significantly influenced the reactivity, structure, thermal, and mechanical properties of the composites. Surprisingly, additions of hydrochar improved thermal stability and stiffness compared to neat epoxy resin.
Article
Chemistry, Physical
Piotr Szatkowski, Martyna Szatkowska, Jacek Gralewski, Leszek Czechowski, Slawomir Kedziora
Summary: This study presents different forms of cellulose and their impact on material properties. The use of plant additives in composites can improve mechanical properties, and the potential of nanoscale cellulose has attracted attention.
Article
Chemistry, Multidisciplinary
Xin Song, Ze-Peng Deng, Chun-Bo Li, Fei Song, Xiu-Li Wang, Li Chen, De-Ming Guo, Yu-Zhong Wang
Summary: This study reports the synthesis of a p-hydroxycinnamic acid-derived epoxy monomer (HCA-EP) and its curing with 4,4/-diaminodiphenylmethane (DDM) to prepare epoxy resins. The resulting HCA-EP-DDM resins exhibit higher glass transition temperature, impressive mechanical properties, and pass flammability tests. These findings provide a simple way to use p-hydroxycinnamic acid as a sustainable alternative to bisphenol A in constructing high-performance bio-based thermosets.
CHINESE CHEMICAL LETTERS
(2022)
Article
Polymer Science
Xuefeng Li, Haidan Lin, Hao Jiang, Yizhu Zhang, Binghui Liu, Yinan Sun, Chengji Zhao
Summary: This study prepared a series of sustainable epoxy resin/diatomite composites with synthetic bio-based matrix resin and silanized natural diatomite filler, showing significantly improved mechanical and thermal stability after the incorporation of diatomite.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Multidisciplinary
Chen Cheng, Yi Wang, Yanling Lu, Shaojie Li, Hua Li, Jun Yan, Shiguo Du
Summary: In this study, ammonium polyphosphate (APP) was surface-modified by bio-based arginine (Arg) to enhance its flame retardance for fire-safety epoxy resin (EP). The modified APP (Arg-APP) showed improved char-forming ability and flame retardance performance compared to pristine APP. The EP/Arg-APP composite exhibited superior flame retardance and mechanical properties, making it a promising material for fire safety applications.
Article
Polymer Science
Ryogo Kobayashi, Mitsuhiro Shibata
Summary: The commercial 20 wt% solid paste of microfibrillated aramid fibers (MFAs) containing water was treated with potassium hydroxide in dimethyl sulfoxide to produce aramid nanofibers (ANFs). Nanocomposites composed of a water-soluble nylon (A-90) and ANFs were prepared, showing that ANFs are finer than MFAs and exhibit superior mechanical properties in terms of tensile strength, modulus, and toughness.
Article
Polymer Science
Warunya Ussama, Mitsuhiro Shibata
Summary: The ring opening polymerization of ε-caprolactone and L-lactide in the presence of dipentaerythritol initiated the formation of hydroxy-terminated 6-armed star-shaped oligomers. The disulfide-containing polyester-urethane networks were successfully prepared and characterized through various analytical techniques. The highest healing efficiency was observed in the PN-LC31-DS1 film, indicating the potential of these materials for self-healing applications.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Kaito Sugane, Mitsuhiro Shibata
Summary: The self-healing polyurethane network films driven by cyclodextrin/adamantane host-guest interaction were prepared and investigated in terms of thermal, mechanical, and healing properties. The feed monomer ratios had significant effects on the properties of the films, with GCE content affecting Tg and tensile modulus, and NCO/OH ratio affecting Tg and tensile modulus. The healing efficiency of the films was influenced by the β-CD/AdOH ratio and NCO/OH ratio.
Article
Polymer Science
Kaito Sugane, Tomoyuki Mishima, Mitsuhiro Shibata
Summary: Curing sorbitol polyglycidyl ether (SPE) with biobased di- and tricarboxylic acids, with or without microfibrillated cellulose (MFC), can produce biobased epoxy nanocomposites or cured epoxy resins with improved glass transition temperature (T-g) and tensile properties. The addition of potassium persulfate (KPS) in the SPE/IA curing system effectively crosslinked the unsaturated C = C bonds in itaconic acid (IA), leading to the highest T-g, tensile strength, and tensile modulus in all the cured resins.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Kanami Yasuda, Yumena Takahashi, Kaito Sugane, Mitsuhiro Shibata
Summary: The study involved the synthesis of a polyaddition oligomer through an epoxy/amine nucleophilic ring-opening reaction, followed by prepolymerization with other compounds to produce cured products that exhibited certain flexural strength and strain under hot-pressing conditions.
Article
Polymer Science
Warunya Ussama, Mitsuhiro Shibata
Summary: Crosslinked polyester films with self-healing properties driven by disulfide metathesis were prepared using 1-methylimidazole-mediated thermal thiol-ene reaction. The ratio of PBSI/LP-3 had an influence on the properties of the crosslinked films, with higher ratios leading to increased 5% weight loss temperature, glass transition temperature, and tensile strength. All crosslinked films exhibited healing properties when hot-pressed, with PBSI/LP-3 films showing higher tensile strength recovery.
Article
Polymer Science
Mizuki Uzaki, Mitsuhiro Shibata
Summary: The study analyzed the properties of the cured products through FTIR, DSC, and DMA results, showing that the raw materials in the mixtures were almost completely consumed, and their performances varied under different conditions. The self-healing properties varied with temperature, with htTB13 and htTB23 exhibiting characteristics distinct from TB13 and TB23.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Polymer Science
Makoto Katoh, Mitsuhiro Shibata
Summary: This study investigates the polymer networks containing both Diels-Alder (DA) adduct moieties and disulfide bonds through the DA and thiol-maleimide reactions at various feed monomer ratios. The cured products exhibit the occurrence of DA and thiol-maleimide reactions, and self-healing abilities.
Article
Polymer Science
Takumi Sekiya, Mitsuhiro Shibata
Summary: Castor oil-based polyurethane network films incorporating cyclodextrin and adamantane units as host and guest components were successfully synthesized. These films exhibited higher glass transition temperatures and mechanical properties compared to network films lacking host or guest moieties. Additionally, all the polyurethane network films demonstrated healing properties at room temperature.
Article
Chemistry, Physical
Yoshitaka Miyamoto, Yumie Koshidaka, Katsutoshi Murase, Shoichiro Kanno, Hirofumi Noguchi, Kenji Miyado, Takeshi Ikeya, Satoshi Suzuki, Tohru Yagi, Naozumi Teramoto, Shuji Hayashi
Summary: Establishing a rapid in vitro evaluation system is crucial for drug development. In recent years, microfabrication technology has been used to create in vitro 3D culture models that mimic the functions of living tissues and organs. This study examined the morphology of various nanoparticles and evaluated the liver function of heterospheroids labeled with different nanoparticles.
Article
Polymer Science
Shinya Yano, Kei Yamaguchi, Mitsuhiro Shibata, Shinsuke Ifuku, Naozumi Teramoto
Summary: This study investigated the mechanical properties of fish collagen peptide (FCP) hydrogels reinforced with chitin nanofibers (CHNF). The addition of 0.6% CHNF significantly improved the compression and tensile strength of the hydrogel, as well as the cell compatibility. These findings suggest that M-FCP hydrogels reinforced with CHNF have potential applications as scaffolds and wound-dressing materials.
Article
Polymer Science
Shogo Kitagawa, Masahiro Ozawa, Mitsuhiro Shibata
Summary: Cured products with different compositions were successfully prepared by pre-polymerization and compression molding, and the occurrence of the reaction was confirmed by Fourier-transform infrared spectroscopy. Increasing the content of aliphatic polyether diamine resulted in a decrease in the glass transition temperature and mechanical strength of the cured products, with the BMIEDS-based ones showing lower performance than BMIPDS-based ones. BMIEDS-APDS-JA and BMIESD-JA exhibited self-healing properties, while BMIPDS-based products did not.
Editorial Material
Polymer Science
Shin-ichi Yusa, Naozumi Teramoto
Article
Polymer Science
Yoshiyuki Honma, Kaito Sugane, Mitsuhiro Shibata
Summary: The effects of PEGMA feed amount on the properties of photocured CAP films incorporating host-guest units were investigated. The results showed that the tan delta peak temperatures, tensile strengths, and moduli of the network films changed with increasing PEGMA content. Except for the film with the lowest PEGMA fraction, all films exhibited self-healing properties at room temperature. The CAP film with a CD-GMA:AdC-GMA:PEGMA molar ratio of 1:1:10 exhibited the highest healing efficiency and could heal at least three times.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Mustafa Kalay, Abidin Esidir, Mahmut Ruzi, N. Burak Kiremitler, Mustafa Serdar Onses
Summary: This study proposes stable and addressable polymer PUFs, utilizing a cross-linkable polymer system, which demonstrates high stochastic characteristics and low-cost production. The performance of the polymer features is evaluated through various analyses, and direct image authentication is achieved using feature matching algorithms.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jingyu Jin, Guoqiang Lu, Jun Nie, Xiaoqun Zhu
Summary: Photopolymerization technology is limited in the fields of food packaging and biomedicine due to the high migration of small molecules from photoinitiators. In this study, a polymerizable 2-vinyl thioxanthone (ETX) was synthesized to improve the migration stability of photoinitiators. Macromolecular photoinitiators (PPI1, PPI2) were also prepared to further reduce migration. The results showed that the ETX/TEOA system had higher initiation performance and PPI2 displayed favorable initiation ability. Additionally, the migration of ETX, PPI1, and PPI2 in photocured film was significantly reduced. These low-migration photoinitiators have potential applications in the fields of food packaging and biological materials.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Weijie Li, Jun Nie, Yingying Zhao, Xiaoqun Zhu
Summary: This study focuses on the development of high-performance, low-migration photoinitiators. A polymerizable photoinitiator (VBP) was synthesized by introducing an ethylene group into benzophenone, and three different molecular weight single-component photoinitiators (PVBN1-3) were synthesized based on VBP. The results show that these new photoinitiators have stronger absorption ability compared to benzophenone and significantly reduce the migration of initiators and co-initiators, addressing the safety concerns caused by migration.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Seira Morimune-Moriya, Yuki Iwahashi, Mitsuru Nakamura, Daisuke Ogawa, Keiji Nakamura
Summary: This study investigates the effect of plasma treatment on carbon nanotubes (CNTs) and the structure/properties of polyimide (PI) nanocomposites with ultra-low content of CNTs. The results show that plasma treatment introduces isocyanate groups on the surface of CNTs and enhances the interfacial interaction between PI and treated CNTs. This leads to a significant improvement in the mechanical properties of the nanocomposites, with even a small addition of treated CNTs showing a substantial increase in Young's modulus, tensile strength and toughness.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuanlong Li, Chaojie Chen, Guoqing Cui, Li Liu, Chao Zhou, Guangfeng Wu
Summary: In this study, a novel ion-conducting hydrogel was fabricated using a straightforward approach. The hydrogel showed excellent tensile properties and high toughness due to physical interactions and covalent binding. Additionally, the introduction of hydroxyethyl cellulose and lithium chloride improved the biocompatibility, mechanical properties, electrical conductivity, and frost resistance of the hydrogel, demonstrating its potential for cold climate applications.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Dengwei Yan, Jinxian Yang, Xuejun Pan, Xiaozheng Duan, Lianwei Li, Mo Zhu
Summary: The influence of backbone length on grafting efficiency during the graft-onto reaction process was investigated. It was found that the polydispersity effect of backbone length does not affect the final grafting efficiency, indicating that the local dynamics of chain segments dominate the graft-onto process.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Zhaoyi Luo, Xianjie Pan, Fanqi Liu, Quanxi Yi, Yanning Zeng, Yunhua Chen, Chaoyang Wang
Summary: This study provides a method to prepare high-performance epoxy materials with good malleability and thermal stability. The materials have self-healing and welding capabilities, thanks to the addition of specific chemical bonds and network structures. They exhibit mechanical properties comparable to commercial epoxy resins and show great potential for sustainable industrial development.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Chaoji Xiong, Hao Wang, Lihua Deng, Kun Liang, Chunhua Wu, Wei Wu, Qian Chen
Summary: In this study, four polyamides were synthesized and their adsorption performances for Hg2+ in aqueous systems were investigated. The polyamides exhibited high adsorption capacities and excellent reusability, with the involvement of sulfur, nitrogen, and oxygen in the chemical adsorption process of Hg2+.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Siim Laanesoo, Olivier Bonjour, Rauno Sedrik, Iris Tamsalu, Patric Jannasch, Lauri Vares
Summary: The insertion of rigid aliphatic or aromatic building blocks in polymer structures is an effective way to synthesize high -Tg polymer materials. In this study, a series of isosorbide-2-aryl carboxylate-5-methacrylate monomers (ArIMAs) were synthesized by functionalizing isosorbide 5-methacrylate with various aromatic lignin-inspired esters. These monomers were polymerized to obtain high molecular-weight poly(aryl carboxylate isosorbide methacrylates) (PArIMAs). The resulting polymers showed high glass transition temperatures and thermal stability, making them suitable for use as high-performance plastics and coatings.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuqian Wu, Weijie Xu, Jianliang Li, Zhangfeng Zhong, Liqing Huang, Shengke Li, Huaping Tan
Summary: This study investigates the improvement of degradation and drug release characteristics of dynamic Schiff base-mediated natural polysaccharide hydrogels using tannic acid (TA), leading to enhanced stability and functionality.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Xi Zhang, Xiangli Kong, Xin Zhou, Yiyan Gao, Yibo Sun, Guanghui Gao, Wei Liu, Kai Shi
Summary: Conductive hydrogels have great development prospects in flexible strain sensors, but long-term direct contact with human skin can cause bacterial infection. A hydrogel with antibacterial, biocompatibility, and toughness was designed and manufactured using a freeze-thaw method. The hydrogel maintains tensile properties and fatigue resistance at low temperatures and is resistant to bacteria. Therefore, hydrogel sensors can be used to monitor human movements.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Wei Zhang, Jiangang Yu, Mingyang Wu, Rui Li, Anqiang Zhang, Yaling Lin
Summary: In this study, polyacrylamide containing quaternary ammonium salts (PAM-X) were synthesized and found to effectively inhibit soil-borne pathogenic fungi while maintaining the balance of microbial population in soil. PAM-X also showed low toxicity to earthworms and fish, providing a new method for the prevention and control of soil-borne fungal diseases.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jiawen He, Haojie Yu, Li Wang, Jian Yang, Yanhui Zhang, Wenbing Huang, Chenguang Ouyang
Summary: This review discusses the use of polymeric hydrogels for atmospheric water harvesting (AWH), including the mechanism of water sorption, fabrication methods, and strategies for optimizing the structure of hydrogels. The extended applications of hygroscopic photothermal hydrogels, such as agricultural irrigation and dehumidification, are also explored. The challenges and prospects of using polymeric hydrogels for AWH are summarized.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Ying Du, Shuaishuai Lu, Yuanna Sun, Qingshan Li, Xinhai He
Summary: This study introduces a method to improve the performance of hydrogels by incorporating proline, resulting in hydrogels with excellent stretchability, high conductivity, and long-term stability. The hydrogel remains flexible and conductive even at ultra-low temperatures.
EUROPEAN POLYMER JOURNAL
(2024)
