Article
Polymer Science
Angela Marotta, Noemi Faggio, Cosimo Brondi
Summary: This study investigates the curing mechanism of furan-based epoxy thermosets with methyl nadic anhydride. The curing kinetics were studied using differential scanning calorimetry, revealing that the total heat of reaction and activation energy of the epoxy resin are dependent on the system composition. Isothermal analysis showed that the order of reaction is not only temperature-dependent, but also composition-dependent.
Article
Multidisciplinary Sciences
Guangxin Lv, Chengtian Shen, Naisong Shan, Elynn Jensen, Xiaoru Li, Christopher M. Evans, David G. Cahill
Summary: The rapid development of high-performance computing and high-power electronics has increased the demand for highly thermal conductive polymers. Through studying the thermal conductivity of epoxy resins, the odd-even effects of the ethylene linker length on liquid crystalline order, mass density, and thermal conductivity were discovered. Controlling the linker length is an effective way to design thermally conductive polymers.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Polymer Science
Younggi Hong, Munju Goh
Summary: This paper reviews the impact of network structure on the thermal properties of epoxy resin (EP) and the feasibility of creating new functionalities by modifying the structure of EP. Liquid crystalline epoxy (LCE) is considered as a promising new material with wide applications in highly thermally conductive composite materials.
Article
Polymer Science
Xiao Zhong, Xutong Yang, Kunpeng Ruan, Junliang Zhang, Haitian Zhang, Junwei Gu
Summary: The integration of intrinsic thermal conductivity and intrinsic flame retardancy in epoxy resins, such as D-LCERDP, offers wider application prospects in the electrical and electronics industries, with improved thermal conductivity coefficients and flame retardancy properties compared to conventional epoxy resins like E-51.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Lorenzo Pezzana, Raffael Wolff, Giuseppe Melilli, Nathanael Guigo, Nicolas Sbirrazzuoli, Jurgen Stampfl, Robert Liska, Marco Sangermano
Summary: The introduction of Hot Lithography has opened up new possibilities for high viscous formulations in additive manufacturing. By increasing the temperature during the 3D printing process, the viscosity of the resin is reduced and higher curing kinetics and degree of conversion can be achieved. This allows for the printing of a wider range of epoxy-based formulations, including those that are not reactive enough at room temperature. Two bio-based epoxy monomers were investigated for their use in Hot Lithography 3D printing, and their performance was compared to a commercial fossil-based resin. The photocuring process and the thermo-mechanical properties of the final thermosets were thoroughly studied, and the potential for printing complex shapes was demonstrated.
Article
Materials Science, Multidisciplinary
Ahmed Al-Qatatsheh, Jitraporn Vongsvivut, Saulius Juodkazis, Nisa V. Salim, Nishar Hameed
Summary: The use of a coordinated silver (I) complex based on solvate ionic liquid in epoxy resins enables unprecedented electrical and thermomechanical properties. The aligned molecular structure achieved through electric field treatment results in high electrical conductivity, excellent energy storage properties, and rapid curing behavior. Quantum mechanics and synchrotron beamline techniques are utilized to optimize and investigate the properties of the system, paving the way for the next generation of thermoset polymers with multifunctional properties.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Polymer Science
Jinjin Dang, Junliang Zhang, Mukun Li, Lin Dang, Junwei Gu
Summary: A biphenyl liquid crystalline small molecule was synthesized and used as a co-curing agent to prepare highly thermally conductive liquid crystalline epoxy resins. The stacking of biphenyl mesogens promoted the formation of locally ordered regions, resulting in higher thermal conductivity and heat resistance.
Article
Environmental Sciences
Mingyu Ou, Richeng Lian, Jiahui Cui, Haocun Guan, Lei Liu, Chuanmei Jiao, Xilei Chen
Summary: A novel phosphorus-containing ionic liquid (TPP-PF6) was synthesized and used as a co-curing agent and highly effective flame retardant for epoxy resin (EP). The incorporation of TPP-PF6 improved the char formation of EP, inhibiting smoke release at high temperatures. EP/2.0TPP-PF6 achieved a UL-94 V-0 rating and a limiting oxygen index of 30.3% with only 2 wt% of TPP-PF6.
Article
Materials Science, Multidisciplinary
Hayun Jeong, Keon-Soo Jang
Summary: This study explored the catalytic effects of tin (Sn) in different epoxy systems and found that Sn exhibited catalytic effects in epoxy-anhydride and epoxy-diacid systems but not in epoxy-amine systems. These catalytic effects can be utilized to accelerate epoxy resin reactions and anticipate reaction conditions in various applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Huijuan Zhao, Huajun Duan, Junjun Zhang, Lu Chen, Chao Wan, Chenhao Zhang, Chentao Liu, Huiru Ma
Summary: A phosphorus-containing oligomer (BID) was designed and applied to improve the flame retardancy and mechanical properties of epoxy resin (EP). The results showed that the addition of BID significantly improved the flame retardancy and mechanical performance of EP/MeTHPA systems.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Agricultural Engineering
Maoping Lyu, Xiangyu Yang, Jing Li, Fei Xie, Hebo Shi, Xinhu Gong, Xusheng Huang, Dandi Fang, Chaoqun Zhang
Summary: Developing novel multifunctional polymeric materials from biomass to replace traditional electric encapsulation materials is significant for energy consumption and sustainable development. This study prepared bio-based epoxy thermosets from different epoxidized plant oils and investigated their properties and structure. Among them, soybean oil-based thermoset showed superior performance and was identified as a suitable candidate for encapsulation materials.
INDUSTRIAL CROPS AND PRODUCTS
(2024)
Article
Chemistry, Applied
Chenglong Yu, Zejun Xu, Xu Ma, Junheng Zhang, Sufang Chen, Menghe Miao, Hongxiang Chen, Daohong Zhang
Summary: EHPI-n polymers can significantly improve the performance of composite materials, including toughness, mechanical properties, heat resistance, and cold resistance, with great potential for various applications.
PROGRESS IN ORGANIC COATINGS
(2021)
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
Polymer Science
Jinghui Dong, Xiaoming Sang, Weihao Yin, Xinggang Chen
Summary: New fluorinated epoxy-phthalonitrile resins were prepared and showed improved thermal stability and dielectric properties, making them potentially useful in heat-resistant cables, chemical-resistant linings, electronic components, cladding materials, and weather-resistant films.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Composites
Lorena Saitta, Vishnu Prasad, Claudio Tosto, Neal Murphy, Alojz Ivankovic, Gianluca Cicala, Gennaro Scarselli
Summary: The study focuses on composite fabrication, characterization, and recyclability of biobased polymer resins reinforced with flax fiber. By selecting different biobased resins and evaluating their mechanical properties, an epoxy resin cured with a cleavable hardener is found to have the highest glass transition temperature, ensuring full recyclability. The study also demonstrates the possibility of separating and recovering fibers and resin from composite panels through a specific chemical process.
POLYMER COMPOSITES
(2022)
