Article
Polymer Science
Paul van den Tempel, Emiel O. van der Boon, Jozef G. M. Winkelman, Antonina V. Krasnikova, Daniele Parisi, Peter J. Deuss, Francesco Picchioni, Ranjita K. Bose
Summary: The furan-maleimide Diels-Alder chemistry is a useful tool for designing thermo-reversible click networks. In this study, a new reaction in furan-maleimide click networks, called the Double-Diels-Alder reaction (DDA), was reported. This reaction forms extra linkages between Diels-Alder adducts and non-reacted furan groups, resulting in stronger materials but reducing thermal recycling efficiency. The study revealed that the DDA reaction can occur in both intramolecular and intermolecular fashion, and it exhibits reversibility like the regular Diels-Alder reaction. The importance of the DDA reaction in furan-maleimide click networks may be easily overlooked, leading to unexpected reactivity in these systems.
Article
Engineering, Environmental
Jin Li, Xia Long, Juexian Cao, Yong Hu
Summary: In this study, the authors achieved the in-situ label-free single-molecule detection of a thermal-reversible Diels-Alder reaction using scanning tunneling microscopy break junction technique. They found that external electric fields can selectively accelerate the forward reaction and stabilize the transition state dipole. The integration of reversible reactions into nanocircuits offers new opportunities for designing functional molecular-scale devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Shalini Parihar, Bharti Gaur
Summary: This article reports on the development of two bio-based thermo-reversible polymers derived from gum rosin. The introduction of thermo-reversible linkages and Diels-Alder bonds improves the durability and self-healing capabilities of the material.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Zhimin Chen, Jian Xie, Yuheng Fu, Xuelin Wang, Xiaolin Zhang, Shan Wang, Chuanxi Xiong, Shipeng Zhu
Summary: In this study, a lightweight and thermal conductive polymer composite based on epoxy resin and high graphitized pitch-based carbon fiber was developed. By introducing a Dies-Alder reaction to graft maleic anhydride onto carbon fiber, the surface activity of the fiber was improved, leading to a significantly increased thermal conductivity of the composite. This work demonstrates that grafting maleic anhydride via Diels-Alder reaction could be a feasible method for functionalizing carbon fiber for advanced thermal management applications.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Patrizio Raffa, Adamantia Kassi, Julian Gosschalk, Nicola Migliore, Lorenzo Massimo Polgar, Francesco Picchioni
Summary: A series of copolymers of styrene and furfuryl methacrylate with different molecular structures were synthesized via atom transfer radical polymerization and cross-linked with a bismaleimide using a thermally reversible Diels-Alder reaction to create self-healing materials. The study found that the furan/styrene ratio and molecular architecture significantly influenced the properties, and that the reversibility of the DA reaction was incomplete in solid-state for materials with high cross-linking density. This research provides important insights for designing thermally reversible materials used in self-healing thermosets, coatings, or adhesives.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Physical
Eugenio Amendola, Barbara Palmieri, Stefania Dello Iacono, Alfonso Martone
Summary: In this study, the possibility of using a self-healing epoxy as an organic coating for metallic substrates was investigated. The recovery performance of the epoxy was evaluated through morphological observation, spectroscopic analysis, and mechanical and nanoindentation tests. The barrier properties and anti-corrosion performance were assessed through electrochemical impedance spectroscopy (EIS). The results showed that the coating could be repaired and restored its original properties after proper thermal treatment, indicating promising applications in the field of corrosion-resistant protective coatings and adhesives.
Article
Chemistry, Organic
Shuheng Xu, Linwei Zeng, Sunliang Cui
Summary: The Diels-Alder (DA) reaction and hetero-Diels-Alder (HDA) reaction are powerful methods for constructing carbocycles and heterocycles. This study presents an integrated building block that combines both DA and HDA reactions, utilizing triazenyl dienes to undergo the DA reaction and the newly released alkene moiety and triazene to engage in the HDA reaction.
Article
Materials Science, Multidisciplinary
Sungmin Jung, Yoon Sang Kim, Han Gyeol Jang, Jong Hyuk Park, Min Park, Yong-Seok Choi, Jaewoo Kim
Summary: This article presents a microbead-type latent curing agent based on benzyl 2-methylimidazole (BMI) incorporated with thermally responsive Diels-Alder (DA) linkages, which can trigger an immediate curing reaction above a certain temperature. The latent curing agent has a long storage stability and provides better curing performance.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Lei Zhang, Zhi Li, Qing-Qing Bi, Lin-Yun Jiang, Xiao-Die Zhang, En Tang, Xue-Meng Cao, Hong-Fang Li, Jose Hobson, De-Yi Wang
Summary: A bio-based phosphaphenanthrene small-molecule reinforcer was proposed to improve the strength, toughness, and fire suppression of epoxy resin. By in-situ constructing a Diels-Alder network within the existing 3D network, the tensile and impact strength of epoxy were enhanced by 26.6% and 48.4%, respectively, without affecting transparency. The incorporation of the reinforcer also increased the glass transition temperature and enabled epoxy to achieve a UL-94 V-0 rating and a limiting oxygen index of 32.0%. Experimental and simulation investigations verified the concept of the in-situ formed Diels-Alder sacrificing network, which resulted in higher crosslinking density and a strong-weak dual network.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Polymer Science
Jinhao Sun, Bingtao Wang, Zhenghong Guo, Zhengping Fang, Juan Li
Summary: A flame retardant containing furan groups was synthesized and its compatibility and performance with epoxy resin were improved by adding a reactive compatibilizer.
Article
Polymer Science
Zhiyong Liu, Zhiguo Song, Benrong Lv, Zumin Qiu
Summary: This study successfully prepared adhesives with high bonding strength, reassembly ability, and self-healing capabilities by combining epoxidized soybean oil (ESO) with Diels-Alder bonds. These adhesives exhibited good solvent resistance and mechanical properties and could be recycled without significant changes in properties.
Article
Polymer Science
Daniela Ionita, Mariana Cristea, Constantin Gaina, Mihaela Silion, Bogdan C. Simionescu
Summary: This study reveals the retroDA reaction of anthracene-maleimide Diels-Alder adduct in anthracene modified polyester resins through thermal analysis. At high temperatures, maleimide homopolymerizes and reacts with allyl groups, resulting in the absence of thermal DA reaction.
Article
Polymer Science
Cheng-Yu Chen, Wei-Cheng Chen, Mohamed Gamal Mohamed, Zih-Yu Chen, Shiao-Wei Kuo
Summary: This work synthesizes a new bifunctional furan derivative (PDMS-FBZ) and prepares a main chain-type copolymer PDMS-DABZ-DDSQ through a Diels-Alder cycloaddition. The copolymer shows high flexibility and high thermal stability, and has a low surface free energy due to the well-dispersed inorganic PDMS and DDSQ units.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Guanghao Huang, Cyrille Kouklovsky, Aurelien de la Torre
Summary: The first enantioselective total synthesis of (+)-lucidumone is described, involving key steps such as an enantioselective inverse-electron-demand Diels-Alder cycloaddition and C-O bond formation. The synthesis is scalable and produced over one gram of natural product in one batch.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Goteti Dhanaraju, B. Satish Ben, Raj Kumar Pittala
Summary: The study successfully developed a self-healing Bm-MWCNT/DA-epoxy nanocomposite with validated reinforcement and repair effects, achieving significant improvements in crack healing efficiency and mechanical properties.
Article
Polymer Science
Ming-Xuan Li, Min-Zhi Rong, Ming-Qiu Zhang
Summary: This study presents an innovative solution based on mechanochemically initiated reversible cascading variation of metal-ligand complexations, which autonomously increases the crosslinking density of metallopolymer networks and blocks stress-induced tiny fracture precursors from growing, fundamentally enhancing the durability of polymers in service.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Hua Xiao, Ze Ping Zhang, Zi Xin Huang, Min Zhi Rong, Ming Qiu Zhang
Summary: The study successfully achieved the conflicting goals of high thermal conductivity and high flexibility in composites by using dihydromyricetin and high molecular weight acrylate copolymer as surface modifiers and adhesive in the preparation of boron nitride paper, allowing for the production of flexible electronic components with excellent thermal conductivity and tensile properties.
COMPOSITES COMMUNICATIONS
(2021)
Article
Polymer Science
Yang You, Min Zhi Rong, Ming Qiu Zhang
Summary: This study proposes a novel strategy for preparing reversibly interlocked networks with enhanced mechanical properties by introducing in situ inter-macromolecular ionic interactions. Through a proof-of-concept transparent interlocked network composed of immiscible polymer chains, it is shown that the interlocking architecture and inter-macromolecular ionic interactions mutually promote each other, leading to the increase in strength, toughness, and creep resistance of the interlocked networks through multilevel energy consumption mechanisms. The inclusion of reversible Diels-Alder bonds and Schiff base allows for self-healing and reprocessable properties in the networks, potentially leading to the development of new polymeric materials with advanced multifunctionality.
Article
Materials Science, Composites
Hua Xiao, Zi Xin Huang, Ze Ping Zhang, Min Zhi Rong, Ming Qiu Zhang
Summary: A facile strategy for effectively constructing in-plane and through-plane thermal conduction paths in polyimide (PI) and its flexible copper clad laminates (FCCLs) was reported by incorporation of hexagonal boron nitride (h-BN) in a controlled manner. The specific sea-island architecture allowed the preparation of highly thermally conductive flexible PI film and its FCCLs at relatively lower total boron nitride loading. The results of the current work may open a new avenue for promoting the practical application of thermally conductive PI based FCCLs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Juan Ye, Guanghong Lin, Ziqian Lin, Haoyu Deng, Junjie Huang, Hongping Xiang, Min Zhi Rong, Ming Qiu Zhang
Summary: In this study, a UV-irradiation/thermo dual-induced self-healing polyurethane elastomer was successfully prepared by tuning the UV irradiation intensity, photoinitiator dosage, and content of disulfide compound (SS-MA). This elastomer exhibited high tensile strength and good self-healing capability, making it suitable for applications in smart coatings and other fields.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Polymer Science
Zhi Rong Ou, Wei Li Peng, Min Zhi Rong, Ming Qiu Zhang
Summary: A novel strategy utilizing reversible boronic ester bonds and imine bonds has been proposed for controllable depolymerization and recovery of polymer blends. Through the preparation of reversibly interlocked polymer networks (RILNs) from two preformed crosslinked polymers, a cascading effect between boronic ester bonds and imine bonds is enabled, allowing controlled depolymerization and recovery.
Article
Polymer Science
Shujun Tan, Yao Wu, Yang Hou, Haoyu Deng, Xiaoxuan Liu, Shoujuan Wang, Hongping Xiang, Minzhi Rong, Mingqiu Zhang
Summary: This study focuses on improving the toughness of 3D printing resin by modifying waste nitrile rubber powders (WNRP). The results show that this strategy significantly enhances the toughness of the resin while reducing waste.
Article
Polymer Science
Jingqi Ji, Shiwen Huang, Shumei Liu, Yanchao Yuan, Jianqing Zhao, Shijie Zhang
Summary: This study synthesized a novel biobased waterborne epoxy resin with flame retardancy and antibacterial ability, and investigated its application in coatings.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Multidisciplinary
Y. You, M. R. Fu, M. Z. Rong, M. Q. Zhang
Summary: By interlocking thermoresponsive and ultraviolet-responsive networks, the material can have both reversibility and dimensional stability, as well as improved creep resistance. The photo-reversible switch mechanism of the ultraviolet-responsive network allows for repeated releasing and reimposing of constraints on the neighboring thermoresponsive network.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Wan Ting Dai, Zhen Hua Xie, Yu Bin Ke, Yang You, Min Zhi Rong, Ming Qiu Zhang, Chun Yong He, Han Qiu Jiang, Hua Yang
Summary: The significantly improved mechanical properties of reversibly interlocked polymer networks (ILNs) originate from their unique interlocked structure. The study reveals that ILNs can maintain homogeneity and dissipate more mechanical energy through internal friction after stretching. These findings provide guidance for the rational design of high-performance multicomponent polymer materials.
MATERIALS TODAY PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Yanan Huang, Guiqing Dang, Min Zhu, Longfei Fan, Minzhi Rong, Mingqiu Zhang
Summary: Reversible shape memory polymers with a broad melting temperature range were developed to overcome the limitation of existing polymers. The polymers were able to memorize multiple temporary shapes through a thermal programming process. By selectively activating partial melting and recrystallization at different temperatures, the polymers demonstrated reversible triple, quadruple, and quintuple shape memory effects. This research may have significant implications for the application of reversible shape memory polymers.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Composites
Yi Xi Song, Wei Zeng, Min Zhi Rong, Ming Qiu Zhang
Summary: A sunlight self-healing thermoelectric generator that harvests energy from the human body is reported in this work. The self-healing capacity is achieved by using a self-healing polyurethane, and the thermoelectric component is composed of an organic-inorganic composite. The composite film exhibits improved thermoelectric performance and both p-type and n-type films have high healing efficiencies.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Wan Ting Dai, Jiawen Hou, Fenfen Wang, Yang You, Pingchuan Sun, Min Zhi Rong, Ming Qiu Zhang
Summary: Reversibly interlocked polymer networks (RILNs) are formed through topological rearrangement of two cross-linked polymers with reversible covalent bonds. This study employs solid-state nuclear magnetic resonance spectroscopy to investigate the microstructures of RILNs, revealing that macromolecular chains from different subnetworks interlace on the molecular level. The findings provide insights into the authentic microstructures of RILNs and aid in the design of new RILNs.
Article
Chemistry, Multidisciplinary
Guang Sheng Cao, Ze Ping Zhang, Min Zhi Rong, Ming Qiu Zhang
Summary: A novel approach to prepare high-performance continuous regenerated keratin fibers with wool-like structure using cortical cells and linear keratin from wool waste as reinforcement and adhesive was proposed. The regenerated fibers exhibited similar mechanical properties, thermal stability, dyeing property, moisture absorption capability, and antistatic resistance to wool, while containing a low amount of synthetic chemicals.
Article
Chemistry, Multidisciplinary
Sheng Jie Yuan, Zhong Quan Peng, Min Zhi Rong, Ming Qiu Zhang
Summary: A novel strategy based on interlocked polymer networks is proposed to enhance the thermal conduction of liquid crystalline epoxy. The interlocked networks show significantly increased thermal conductivity compared to the parent single-LCE networks. The technology developed in this study has remarkable potential for future applications.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.