Article
Polymer Science
Yufeng Lei, Anqiang Zhang, Yaling Lin
Summary: The utilization of reversible covalent bonds in constructing an interpenetrating covalent adaptable network has led to significant improvements in mechanical performance and high restoration efficiency. This work may open up new avenues for developing more sustainable high-performance polymer blends and IPNs with covalent reversible bonds.
Article
Materials Science, Composites
Md Najib Alam, Vineet Kumar, Chae-Ryeong Jo, Sang-Ryeoul Ryu, Dong-Joo Lee, Sang - Shin Park
Summary: This study explores the mechanical and magneto-mechanical properties of styrene butadiene rubber-based magnetorhelogical elastomers reinforced with carbonyl iron particles. The addition of nano carbon materials and an optimum amount of magnetic filler significantly improves the magnetic and mechanical properties, which is beneficial for high-energy smart damping systems.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Sergei A. Kostrov, Mitchell R. Maw, Sergei S. Sheiko, Elena Yu. Kramarenko
Summary: We introduce a novel class of magnetoactive thermoplastic elastomers (MATEs) based on A-g-B bottlebrush graft copolymers filled with magnetic carbonyl iron microparticles. These MATEs exhibit the ability to change their mechanical properties and magnetic response through particle rearrangement at enhanced temperatures under a magnetic field. This thermo-magnetic processing of MATEs enables the transformation into an anisotropic composite with improved elastic modulus, damping factor, and magnetorheological effect, which has significant implications for biomedical devices and soft robotics.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sergei A. Kostrov, Erfan Dashtimoghadam, Andrew N. Keith, Sergei S. Sheiko, Elena Yu Kramarenko
Summary: The magnetoactive elastomers (MAEs) based on bottlebrush polymer networks filled with carbonyl iron microparticles mimic the mechanical behavior of biological tissues and allow for contactless regulation by external magnetic fields. The magnetically aligned microparticles significantly increase shear modulus and transition from a viscoelastic to elastic regime. The solvent-free method of preparation provides advantages such as injection molding and uniform particle distribution within MAE composites, enabling new opportunities in the design of actuators and active vibration insulation systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Nima Alizadeh, David P. Thorne, Maria L. Auad, Asha-Dee N. Celestine
Summary: A carbon fiber/vinyl ester-polyurethane interpenetrating polymer network (IPN) laminate composite was successfully fabricated and characterized for the first time, showing improved damping response and lowered glass transition temperature with the addition of polyurethane. Although the IPN composite exhibited lower tensile properties compared to the vinyl ester composite, its flexural properties were comparable to the latter.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhiying Ren, Chengwei Li, Xiaoyuan Zheng, Tao Zhou, Hongbai Bai
Summary: In this study, a new type of interpenetrating metal entangled structure/silicone rubber composite (MES-SRC) is developed. Through dynamic mechanical tests and analysis, it is found that MES-SRC has higher bearing capacity and damping energy dissipation.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Thermodynamics
Ke Xu, Fan Jing, Ruikang Zhao, Chengsuang Wang, Qingjun Wang, Hongfeng Xie
Summary: Bio-based interpenetrating polymer networks (IPNs) with tunable thermal and mechanical properties were prepared using bio-based polyurethane (PU) and epoxy resin (EP) derived from plant oils. The composition of the IPNs affected the dynamic modulus, glass transition temperature, thermal stability, tensile strength, damping properties, and elongation at break. By adjusting the mass ratio of the plant oil-based EP to the soybean oil-based PU, the desired properties of the bio-based PU/EP IPNs can be achieved.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Rayan Chatterjee, Santidan Biswas, Victor V. Yashin, Michael Aizenberg, Joanna Aizenberg, Anna C. Balazs
Summary: Interpenetrating and random copolymer networks are important for various industrial applications. A theoretical model has been developed for the controlled growth of these networks, allowing for customization of their swelling and elastic properties through adjustments in monomer and crosslinker concentrations or chemical choices. This process can produce gels with a range of mechanical properties to meet the materials requirements of different applications.
Article
Polymer Science
Guojiang Liao, Wenzheng Zhang, Qingna Zeng, Xiangfeng Peng, Wanjun Wu, Shuai Liu, Bin Lan, Yixiong Zhang
Summary: Magnetorheological elastomer (MRE), a type of smart material, can have its mechanical properties controlled quickly and reversibly by an external magnetic field. This study investigated the influence of gamma radiation on the damping property of MRE. It was found that gamma radiation does not affect the variation trend of the loss factor of MRE with increasing strain amplitude or magnetic flux density, but it does affect the variation trend of the maximum change of the loss factor induced by strain or magnetic field.
Article
Polymer Science
Davey C. Hoekstra, Michael G. Debije, Albert P. H. J. Schenning
Summary: This study reports the formation of triple-shape-memory liquid crystalline-interpenetrating polymer network (LC-IPN) actuators based on a hybrid acrylate-oxetane LC mixture. Polymer films with two distinct glass-transition temperatures are created through the orthogonal polymerization of oxetane and acrylate liquid crystals, allowing for one-way triple-shape-memory actuation and two-way bending actuation with a broad temperature window. The results demonstrate the combination of shape memory polymers with liquid crystal-based soft actuators, showcasing advanced stimuli-responsive properties.
Article
Materials Science, Multidisciplinary
Xuewei Huang, Li Li, Xiaohui Ruan
Summary: Magnetorheological Elastomers (MREs) are smart materials that can modulate their mechanical properties by changing external magnetic fields. A four-parameter mechanical model was established to analyze the effects of magnetic fields, loading frequency, and strain amplitude on the properties of MRE materials. The model was validated through experimental testing, and a stiffness-controllable energy dissipator based on MRE materials was designed and evaluated.
FRONTIERS IN MATERIALS
(2023)
Article
Polymer Science
Tyler R. Heyl, Jeremy M. Beebe, Shane Mangold, Anthony J. Silvaroli, Dongchan Ahn, Kenneth R. Shull, Muzhou Wang
Summary: Compatibilization is a strategy to combine immiscible polymers without macrophase separation, resulting in mechanically strengthened materials. In this study, we investigate the relationship between local modulus and composition in poly(dimethylsiloxane)/poly(methyl methacrylate) interpenetrating network elastomers using nanomechanical mapping and single-molecule localization microscopy. We reveal differences in both modulus and composition between individual phase-separated PMMA domains and propose a two-stage phase separation mechanism to explain the observed behaviors. The combination of nanomechanical mapping and single-molecule localization microscopy provides a level of microstructural understanding that has not been previously achieved.
Article
Engineering, Electrical & Electronic
Josu Fernandez Maestu, Ander Garcia Diez, Carmen R. Tubio, Ainara Gomez, Joanes Berasategui, Pedro Costa, M. Mounir Bou-Ali, Jon Gutierrez Etxebarria, Senentxu Lanceros-Mendez
Summary: Advances in the development of magnetorheological elastomers (MREs) with self-sensing characteristics are reported in this study. Conductive fillers were added to increase the applicability of MREs. The SEBS matrix with embedded Fe3O4 nanoparticles as magnetically responsive materials and MWCNT as conductive fillers were used to prepare multifunctional MREs. The addition of MWCNT improved the mechanical, electrical, magnetorheological, and piezoresistive properties of the composites, making them suitable for self-sensing deformation in magnetorheological actuators.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Applied
Murat Sen, Orhan Soydas, Davut Aksut
Summary: This study investigated the effects of curing system on the properties of poly(epichlorohydrin) (CO) and poly (epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) (GECO) elastomers, as well as their blends. Different curing agents, ethylene thiourea (ETU) and 2,4,6-Trimercapto-s-triazine (TMT), were used to study their effects on damping behavior. Blends of homopolymer and terpolymer of epichlorohydrin were created to determine the impact of blending on damping properties. It was found that using TMT instead of ETU improved mechanical properties without changing damping behavior. Blending the homopolymer and terpolymer allowed for elastomers with high damping properties at moderate temperatures.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Engineering, Electrical & Electronic
Winnie M. Kiarie, Kinjal Gandha, David C. Jiles
Summary: The temperature-dependent magnetic properties of magnetorheological elastomers (MREs) were investigated. The magnetization curves of these materials overlap for different measured temperature values, but the saturation magnetization decreases with increasing temperature, while the differential susceptibility exhibits different trends. The magnetization response of these materials is only slightly sensitive to temperature changes, and it is highly dependent on particle loading fractions and particle orientation.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
