Article
Polymer Science
Bin Du, Daodao Xue, Rubai Luo, Kenan Yang, Huailin Li, Shisheng Zhou
Summary: This paper mainly focuses on improving the properties of epoxy resin by utilizing carbon nanotubes (CNTs) for better dispersion and reinforcement in composites. The results show that the modified CNTs have better performance in the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
F. N. Alhabill, A. S. Vaughan, T. Andritsch
Summary: The study examines the interactions between amorphous silicon nitride (Si3N4) nanofiller and an epoxy resin matrix, revealing that the processing protocol details critically affect the ultimate properties of Si3N4/epoxy nanocomposites. By controlled calcination of Si3N4, it is possible to adjust the initial surface chemistry of nanoparticles and modify their reactivity with epoxy-containing moieties.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Engineering, Environmental
Jinghong Liu, Xiaoqing Zhang, Sihui Liu, Caihong Lei
Summary: It is found that allyl groups can reduce the viscosity and curing rate of epoxy monomers. After high-temperature treatment, the allyl-containing resin exhibits no significant drop in Td5% and Tg, and even increases these temperature values.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Lei He, Tao Chen, Yi Zhang, Lianrui Hu, Ting Wang, Rui Han, Jia-Lin He, Wei Luo, Zhi-Guo Liu, Jin-Ni Deng, Ming-Jun Chen
Summary: A bulky aromatic structure imide-DOPO derivative (BMP) successfully imparts flame retardancy and fluorescence simultaneously to epoxy resins. BMP, benefiting from space hindering and intermolecular interactions, maintains the glass transition temperature of the epoxy resin with minor impact on mechanical properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Na Teng, Jinyue Dai, Shuaipeng Wang, Xiaoling Liu, Jingyuan Hu, Xiaosu Yi, Xiaoqing Liu
Summary: A novel epoxy resin modifier, EHBFR, was designed and synthesized in this study, which effectively improved the fire safety and low-temperature impact strength of modified DGEBA without decreasing its T-g. The addition of EHBFR offers a promising strategy for constructing high-performance epoxy thermosets with excellent flame retardancy and enhanced properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Hongfeng Chen, Yan Li, Jue Cheng, Yanlong Luo, Qingsong Lian
Summary: This article investigates the toughening mechanism of binary DGEBA/D12 and ternary DGEBA/D12/C20 systems through experimental and molecular dynamics simulation. It is found that the compatibility between D12 and C20 allows C20 to self-assemble around the alkyl side chains of D12, and the soft alkyl chains and self-assembly effect simultaneously improve the strength, modulus, and toughness of the EPDA-2.5 system.
Article
Engineering, Environmental
Na Teng, Jinyue Dai, Shuaipeng Wang, Jingyuan Hu, Xiaoqing Liu
Summary: This study presents a successful approach to improve the flame retardancy, toughness, T-g, and strength of epoxy resins by incorporating a hyperbranched flame retardant. The modified epoxy resin shows excellent properties, indicating its potential for commercial applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Sergey Savotchenko, Ekaterina Kovaleva
Summary: Based on experimental investigations, a resin glass transition equation has been proposed, showing that the composition of epoxy resin-based composites affects the glass transition temperature. Different fillers, such as organosilicon PDMS-5 and nanodispersed pyrogenic silica HDK, can lead to varying degrees of increase in the glass transition temperature. The formulated equation provides a useful tool for predicting glass transition temperatures in polymer composites.
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
Qiuyue Ding, Ning Ding, Xiangfeng Chen, Wenyue Guo, Fahmi Zairi
Summary: This study investigates the effect of grain boundaries (GBs) on the mechanical properties of epoxy/graphene composites through molecular dynamics simulation. Ten GB models were constructed and comparisons were made. The results revealed significant effects of GBs on the tensile and compressive behaviors, glass transition temperature (T-g), and configurations of epoxy/graphene composites. The underlying mechanisms involve multi-factor coupling, including the tensile strength of reinforcements, interfacial interaction energy, and inflection degree of reinforcements, resulting in a diversity in the tensile yield strength of the composites.
Article
Polymer Science
Raquel Gimenez, Berna Serrano, Veronica San-Miguel, Juan Carlos Cabanelas
Summary: This review provides an overview of the recent progress in MXene/epoxy nanocomposites development and the contribution of nanofillers to the enhancement of properties. The application of MXene as a nanofiller in epoxy resins is discussed, highlighting its potential in protective coatings, electromagnetic-interference shielding, and composites. The challenges in this field are also discussed.
Article
Chemistry, Physical
Mohammed Mostafa Adnan, Arpenik Kroyan, Chaman Srivastava, Sotirios Grammatikos, Julia Glaum, Marit-Helen Glomm Ese, Sondre Kvalvag Schnell, Mari-Ann Einarsrud
Summary: Both experimental and molecular dynamics simulation study demonstrated that the thermomechanical properties of epoxy can be improved by incorporating well-dispersed SiO2 nanoparticles. The dispersion models of SiO2 include dispersed individual molecules and spherical nanoparticles, which both showed consistent thermodynamic and thermomechanical properties with experimental results. The interaction between different parts of the polymer chains and SiO2 was observed within the epoxy at a distance of 3-5 nm, depending on the particle size. The findings from both models were validated against experimental results, such as glass transition temperature and tensile elastic mechanical properties, indicating their suitability for predicting thermomechanical and physicochemical properties of epoxy-SiO2 nanocomposites.
Article
Polymer Science
Changhai Zhang, Zeyang Liu, Tiandong Zhang, Xubin Wang, Chao Yin, Xianli Liu, Qingguo Chi
Summary: In this study, tetrafunctional epoxy resin AG70 and phenolic epoxy resin F51 were blended in different proportions to investigate the microstructure and electrical/thermal properties of the epoxy resin blends. The results demonstrated that a blending ratio of 5:5 achieved a high glass transition temperature of 213.3 degrees C and an electric breakdown of 206.1 kV/mm, indicating excellent overall performances with great potential for applications in the electronic and microelectronic industries.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Hao Wang, Jun Yuan, Yadong Wang, Yiming Ma, Shisheng Lyu, Zongmin Zhu
Summary: A phosphorus-containing triazole derivative named TBO was synthesized and incorporated into the epoxy framework to enhance the flame retardance of epoxy resin. The modified epoxy composites showed improved mechanical properties and glass transition temperature, indicating potential applications.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Ilya Tarasov, Anastasiya Oboishchikova, Roman S. Borisov, Vyacheslav V. Kireev, Igor S. Sirotin
Summary: In this study, a simplified one-step method for the synthesis of phosphazene-based epoxy resins was developed, and bisphenol F was used to decrease viscosity. The cured resins showed high mechanical properties and glass transition temperature, making them suitable for use as resin components in composite materials, adhesives, and paints.
Article
Polymer Science
Ketly Pontes, Tamara Indrusiak, Bluma G. Soares
Summary: The conductive blends of PVDF-co-HFP/PAni were prepared by in situ polymerization and dry blending approach, showing that samples prepared in H2O/toluene medium exhibited better performance. Different preparation methods and material compositions have significant effects on conductivity and electromagnetic interference shielding effectiveness.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Tamara Indrusiak, Iaci M. Pereira, Ana P. Heitmann, Jeferson G. Silva, Angelo M. L. Denadai, Bluma G. Soares
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Engineering, Mechanical
L. R. Orlandini, I. R. Henriques, D. A. Castello, L. A. Borges, B. G. Soares
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2020)
Article
Chemistry, Applied
Loan F. Calheiros Souto, Bluma G. Soares
PROGRESS IN ORGANIC COATINGS
(2020)
Article
Materials Science, Multidisciplinary
Bluma G. Soares, Mayara R. S. Nascimento, Adriane S. Sena, Tamara Indrusiak, Loan F. C. Souto, Ketly Pontes
Article
Materials Science, Multidisciplinary
Mayara C. Bertolini, Silvia D. A. S. Ramoa, Claudia Merlini, Guilherme M. O. Barra, Bluma G. Soares, Alessandro Pegoretti
FRONTIERS IN MATERIALS
(2020)
Article
Chemistry, Physical
Ruan R. Henriques, Bluma G. Soares
Summary: This study discusses the performance of sepiolite modified with phosphonium-based ionic liquids as anti-corrosive pigment for epoxy resin coatings, showing enhanced corrosion resistance and outstanding barrier properties provided by the modified sepiolite with ionic liquids for epoxy resins.
APPLIED CLAY SCIENCE
(2021)
Article
Polymer Science
Alessandra de Alencar Padua Gabino, Bluma Guenther Soares, Adriana Anjos Silva
Summary: Electrically conductive thermoplastic vulcanizates based on polypropylene/nitrile rubber blends loaded with multiwalled carbon nanotubes were prepared by dynamic vulcanization. Two different mixing sequences were used to incorporate the CNT, both of which favored the location of CNT inside the PP phase and achieved low percolation threshold and good conductivity performance. The TPV samples prepared by both methods showed an overall electromagnetic attenuation of around 70% in the X-band frequency range.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Camila Mouta Caldas, Bluma Guenther Soares, Tamara Indrusiak, Guilherme Mariz Oliveira Barra
Summary: By modifying PMMA nanocomposites and incorporating GNP with different fluorinated ionic liquids, composites with high thermal stability and conductivity can be obtained, showing excellent absorption properties in terms of microwave absorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Characterization & Testing
Juliana M. Farias da Silva, Bluma G. Soares
Summary: Epoxidized cardanol-based prepolymer (ECP) from cashew nut shell liquid (CNSL) was successfully utilized as a biobased compatibilizer/chain extender for PLA/PBAT blends, improving mechanical, dynamic-mechanical and thermal properties, and offering new possibilities for cost-effective biobased and/or biodegradable materials for food packaging applications.
Article
Materials Science, Multidisciplinary
Isabela Pinto Ferreira, Alex da Silva Sirqueira, Taiane Andre dos Santos, Monica Feijo Naccache, Bluma Guenther Soares
Summary: Research on bio-plasticizers in polymer blends is strategically important. The bio-plasticizer CNSL was found to improve mechanical properties of EVA and SBS blends, as well as influencing creep and recovery behavior. The concentration of the bio-plasticizer significantly correlated with rheological test results, leading to an increase in the elastic phase.
JOURNAL OF ELASTOMERS AND PLASTICS
(2021)
Article
Polymer Science
Bluma Guenther Soares, Adriana A. Silva, Veronica D. Lima, Deborah N. Barros, Sebastien Livi
Summary: A novel toughened epoxy system cured with anhydride-based hardener was successfully prepared by incorporating nonpolar liquid polybutadiene functionalized with isocyanate groups. The resulting ER-PB-ER triblock copolymer displayed cocontinuous-like morphology and led to a significant improvement in toughness and impact resistance, while also increasing the glass transition temperature of the system. The excellent physic-mechanical performance was attributed to the unique morphology achieved through the addition of the modified polybutadiene.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Reinaldo Yoshio Morita, Juliana Regina Kloss, Ronilson Vasconcelos Barbosa, Bluma Guenther Soares, Luis Carlos Oliveira da Silva, Ana Lucia Nazareth da Silva
POLIMEROS-CIENCIA E TECNOLOGIA
(2020)
Article
Materials Science, Multidisciplinary
Monica O. Penna, Adriana A. Silva, Francisca F. do Rosario, Sergio De Souza Camargo Jr, Bluma G. Soares
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Thuanny Almeida Moraes, Maria Julia Farroco, Ketly Pontes, Magda Fontes Bittencourt, Bluma Guenter Soares, Fernando Gomes Souza Jr
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.
