Relevant bibliographies by topics / Electrically conductive thermoplastic composites

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Electrically conductive thermoplastic composites'

Author: Grafiati
Published: 25 May 2024

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Journal articles on the topic "Electrically conductive thermoplastic composites"

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Kim, Namsoo Peter. "3D-Printed Conductive Carbon-Infused Thermoplastic Polyurethane." Polymers 12, no. 6 (May 27, 2020): 1224. http://dx.doi.org/10.3390/polym12061224.

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3D printable, flexible, and conductive composites are prepared by incorporating a thermoplastic elastomer and electrically conductive carbon fillers. The advantageous printability, workability, chemical resistance, electrical conductivity, and biocompatibility components allowed for an enabling of 3D-printed electronics, electromagnetic interference (EMI) shielding, static elimination, and biomedical sensors. Carbon-infused thermoplastic polyurethane (C/TPU) composites have been demonstrated to possess right-strained sensing abilities and are the candidate in fields such as smart textiles and biomedical sensing. Flexible and conductive composites were prepared by a mechanical blending of biocompatible TPU and carbons. 3D structures that exhibit mechanical flexibility and electric conductivity were successfully printed. Three different types of C/TPU composites, carbon nanotube (CNT), carbon black (CCB), and graphite (G) were prepared with differentiating sizes and composition of filaments. The conductivity of TPU/CNT and TPU/CCB composite filaments increased rapidly when the loading amount of carbon fillers exceeded the filtration threshold of 8%–10% weight. Biocompatible G did not form a conductive pathway in the TPU; resistance to indentation deformation of the TPU matrix was maintained by weight by 40%. Adding a carbon material to the TPU improved the mechanical properties of the composites, and carbon fillers could improve electrical conductivity without losing biocompatibility. For the practical use of the manufactured filaments, optimal printing parameters were determined, and an FDM printing condition was adjusted. Through this process, a variety of soft 3D-printed C/TPU structures exhibiting flexible and robust features were built and tested to investigate the performance of the possible application of 3D-printed electronics and medical scaffolds.
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Akonda, Mahmudul H., Carl A. Lawrence, and Hassan M. EL-Dessouky. "Electrically conductive recycled carbon fibre-reinforced thermoplastic composites." Journal of Thermoplastic Composite Materials 28, no. 11 (November 21, 2013): 1550–63. http://dx.doi.org/10.1177/0892705713513294.

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Probst, Henriette, Konrad Katzer, Andreas Nocke, Rico Hickmann, Martina Zimmermann, and Chokri Cherif. "Melt Spinning of Highly Stretchable, Electrically Conductive Filament Yarns." Polymers 13, no. 4 (February 16, 2021): 590. http://dx.doi.org/10.3390/polym13040590.

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Electrically conductive fibers are required for various applications in modern textile technology, e.g., the manufacturing of smart textiles and fiber composite systems with textile-based sensor and actuator systems. According to the state of the art, fine copper wires, carbon rovings, or metallized filament yarns, which offer very good electrical conductivity but low mechanical elongation capabilities, are primarily used for this purpose. However, for applications requiring highly flexible textile structures, as, for example, in the case of wearable smart textiles and fiber elastomer composites, the development of electrically conductive, elastic yarns is of great importance. Therefore, highly stretchable thermoplastic polyurethane (TPU) was compounded with electrically conductive carbon nanotubes (CNTs) and subsequently melt spun. The melt spinning technology had to be modified for the processing of highly viscous TPU–CNT compounds with fill levels of up to 6 wt.% CNT. The optimal configuration was achieved at a CNT content of 5 wt.%, providing an electrical resistance of 110 Ωcm and an elongation at break of 400%.
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Grellmann, Henriette, Mathis Bruns, Felix Michael Lohse, Iris Kruppke, Andreas Nocke, and Chokri Cherif. "Development of an Elastic, Electrically Conductive Coating for TPU Filaments." Materials 14, no. 23 (November 24, 2021): 7158. http://dx.doi.org/10.3390/ma14237158.

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Electrically conductive filaments are used in a wide variety of applications, for example, in smart textiles and soft robotics. Filaments that conduct electricity are required for the transmission of energy and information, but up until now, most electrically conductive fibers, filaments and wires offer low mechanical elongation. Therefore, they are not well suited for the implementation into elastomeric composites and textiles that are worn close to the human body and have to follow a wide range of movements. In order to overcome this issue, the presented study aims at the development of electrically conductive and elastic filaments based on a coating process suited for multifilament yarns made of thermoplastic polyurethane (TPU). The coating solution contains TPU, carbon nanotubes (CNT) and N-Methyl-2-pyrrolidone (NMP) with varied concentrations of solids and electrically conductive particles. After applying the coating to TPU multifilament yarns, the mechanical and electrical properties are analyzed. A special focus is given to the electromechanical behavior of the coated yarns under mechanical strain loading. It is determined that the electrical conductivity is maintained even at elongations of up to 100%.
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Araya-Hermosilla, Esteban, Alice Giannetti, Guilherme Macedo R. Lima, Felipe Orozco, Francesco Picchioni, Virgilio Mattoli, Ranjita K. Bose, and Andrea Pucci. "Thermally Switchable Electrically Conductive Thermoset rGO/PK Self-Healing Composites." Polymers 13, no. 3 (January 21, 2021): 339. http://dx.doi.org/10.3390/polym13030339.

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Among smart materials, self-healing is one of the most studied properties. A self-healing polymer can repair the cracks that occurred in the structure of the material. Polyketones, which are high-performance thermoplastic polymers, are a suitable material for a self-healing mechanism: a furanic pendant moiety can be introduced into the backbone and used as a diene for a temperature reversible Diels-Alder reaction with bismaleimide. The Diels-Alder adduct is formed at around 50 °C and broken at about 120 °C, giving an intrinsic, stimuli-responsive self-healing material triggered by temperature variations. Also, reduced graphene oxide (rGO) is added to the polymer matrix (1.6–7 wt%), giving a reversible OFF-ON electrically conductive polymer network. Remarkably, the electrical conductivity is activated when reaching temperatures higher than 100 °C, thus suggesting applications as electronic switches based on self-healing soft devices.
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Cabrera, Eusebio Duarte, Seunghyun Ko, Xilian Ouyang, Elliott Straus, L. James Lee, and Jose M. Castro. "Technical feasibility of a new approach to electromagnetic interference (EMI) shielding of injection molded parts using in-mold coated (IMC) nanopaper." Journal of Polymer Engineering 34, no. 8 (October 1, 2014): 739–46. http://dx.doi.org/10.1515/polyeng-2014-0053.

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Abstract Electromagnetic interference (EMI) is a disturbance that affects an electrical circuit due to electromagnetic radiation emitted from an external source. EMI may induce malfunction of equipment, interference with telecommunications and degradation up to total loss of data. EMI shielding refers to the reflection and/or adsorption of electromagnetic radiation by a highly electrically conductive material, usually metal, or polymer composites filled with conductive fillers. However, metal coatings tend to corrode and acceptable EMI shielding levels are difficult to achieve using conductive fillers in a thermoplastic matrix. This study presents a new approach to EMI shielding of plastic parts using in-mold coated (IMC) nanoparticle thin films or nanopapers to create a highly conductive top layer. EMI shielding effectiveness (SE) and electrical conductivity were measured.
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Aloqalaa, Ziyad. "Electrically Conductive Fused Deposition Modeling Filaments: Current Status and Medical Applications." Crystals 12, no. 8 (July 28, 2022): 1055. http://dx.doi.org/10.3390/cryst12081055.

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Fused Deposition Modeling (FDM) is one of the most popular three dimensional (3D) printing techniques especially among researchers. Recently, FDM has been widely developed and improved in many areas. One of these improvements is the introduction of electrically conductive filaments. In general, conductive filaments are usually made of conductive polymer composites. These composites consist of a thermoplastic material blended with carbon-based materials. The quantity of commercially available conductive filaments has grown significantly in recent years. This paper presents a sample of currently available conductive filaments (eight filaments were chosen). These samples were compared by measuring resistance value and highlighting resulted defects of each sample. Additionally, this paper searched and reviewed articles that used conductive FDM filaments in medical applications. These articles were collected and summarized in terms of name of filaments were used, the specific function of the printed conductive object, and name of the printer used to print the conductive object. In conclusion, the main purpose of this project is to facilitate the work of future medical researchers who would like to use commercially available conductive FDM filaments.
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Gul, Jahan Zeb, Memoon Sajid, and Kyung Hyun Choi. "Retracted Article: 3D printed highly flexible strain sensor based on TPU–graphene composite for feedback from high speed robotic applications." Journal of Materials Chemistry C 7, no. 16 (2019): 4692–701. http://dx.doi.org/10.1039/c8tc03423k.

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A novel, highly flexible and electrically resistive-type strain sensor with a special three-dimensional conductive network was 3D printed using a composite of conductive graphene pellets and flexible thermoplastic polyurethane (TPU) pellets.
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Kaynan, Ozge, Alptekin Yıldız, Yunus Emre Bozkurt, Elif Ozden Yenigun, and Hulya Cebeci. "Electrically conductive high-performance thermoplastic filaments for fused filament fabrication." Composite Structures 237 (April 2020): 111930. http://dx.doi.org/10.1016/j.compstruct.2020.111930.

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Dils, Werft, Walter, Zwanzig, von Krshiwoblozki, and Schneider-Ramelow. "Investigation of the Mechanical and Electrical Properties of Elastic Textile/Polymer Composites for Stretchable Electronics at Quasi-Static or Cyclic Mechanical Loads." Materials 12, no. 21 (November 1, 2019): 3599. http://dx.doi.org/10.3390/ma12213599.

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In the last decade, interest in stretchable electronic systems that can be bent or shaped three-dimensionally has increased. The application of these systems is that they differentiate between two states and derive there from the requirements for the materials used: once formed, but static or permanently flexible. For this purpose, new materials that exceed the limited mechanical properties of thin metal layers as the typical printed circuit board conductor materials have recently gained the interest of research. In this work, novel electrically conductive textiles were used as conductor materials for stretchable circuit boards. Three different fabrics (woven, knitted and nonwoven) made of silver-plated polyamide fibers were investigated for their mechanical and electrical behavior under quasi-static and cyclic mechanical loads with simultaneous monitoring of the electrical resistance. Thereto, the electrically conductive textiles were embedded into a thermoplastic polyurethane dielectric matrix and structured by laser cutting into stretchable conductors. Based on the characterization of the mechanical and electrical material behavior, a life expectancy was derived. The results are compared with previously investigated stretchable circuit boards based on thermoplastic elastomer and meander-shaped conductor tracks made of copper foils. The microstructural changes in the material caused by the applied mechanical loads were analyzed and are discussed in detail to provide a deep understanding of failure mechanisms.
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Dissertations / Theses on the topic "Electrically conductive thermoplastic composites"

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Karst, Adèle. "Synthèse de particules conductrices à base de PEDOT et mise en œuvre de composites thermoplastiques par extrusion." Electronic Thesis or Diss., Strasbourg, 2023. http://www.theses.fr/2023STRAE030.

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Les matériaux polymères conducteurs électriques font partie des matériaux polymères fonctionnels à haute valeur ajoutée pour de multiples applications émergentes, en particulier dans le domaine de l’électronique souple. De nombreuses applications industrielles intéressantes existent comme le chauffage par effet Joule ou l’isolation/blindage électromagnétique. A l’heure actuelle, cette dynamique s’étend au secteur de la plasturgie via les technologies émergentes de la fabrication additive et de la plastronique. Cependant, de nombreux verrous concernant les polymères conducteurs actuellement disponibles doivent être levés. Récemment, le PEDOT a permis d’atteindre des niveaux de conductivité électrique proche des métaux (env. 5000 S/cm). Cependant, le PEDOT est un polymère infusible et ne peut donc pas être mis en œuvre facilement par les techniques conventionnelles de l’industrie de la plasturgie. Pour contourner cet inconvénient, la stratégie mise en œuvre a été d’utiliser le PEDOT comme charge conductrice organique en le dispersant dans une matrice thermoplastique par extrusion pour obtenir des composites thermoplastiques conducteurs
Electrically conductive polymer materials are among the functional polymer materials with high added value for many emerging applications, particularly in the field of flexible electronics. There are many interesting industrial applications, such as Joule heating and electromagnetic insulation/shielding. This dynamic is now being extended to the plastics processing sector via the emerging technologies of additive manufacturing and plastronics. However, there are still a number of obstacles to be overcome when it comes to the conductive polymers currently available. Recently, PEDOT has made it possible to achieve electrical conductivity levels close to those of metals (around 5000 S/cm). However, PEDOT is an infusible polymer and cannot therefore be processed easily using conventional techniques in the plastics processing industry. To overcome this drawback, the strategy implemented was to use PEDOT as an organic conductive filler by dispersing it in a thermoplastic matrix using extrusion to obtain conductive thermoplastic composites
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Rhodes, Susan M. "Electrically Conductive Polymer Composites." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1194556747.

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Tsotra, Panagiota. "Electrically conductive epoxy matrix composites /." Kaiserslautern : IVW, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015387627&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Agar, Joshua Carl. "Highly conductive stretchable electrically conductive composites for electronic and radio frequency devices." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44875.

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The electronics industry is shifting its emphasis from reducing transistor size and operational frequency to increasing device integration, reducing form factor and increasing the interface of electronics with their surroundings. This new emphasis has created increased demands on the electronic package. To accomplish the goals to increase device integration and interfaces will undoubtedly require new materials with increased functionality both electrically and mechanically. This thesis focuses on developing new interconnect and printable conductive materials capable of providing power, ground and signal transmission with enhanced electrical performance and mechanical flexibility and robustness. More specifically, we develop: 1.) A new understanding of the conduction mechanism in electrically conductive composites (ECC). 2.) Develop highly conductive stretchable silicone ECC (S-ECC) via in-situ nanoparticle formation and sintering. 3.) Fabricate and test stretchable radio frequency devices based on S-ECC. 4.) Develop techniques and processes necessary to fabricate a stretchable package for stretchable electronic and radio frequency devices. In this thesis we provide convincing evidence that conduction in ECC occurs predominantly through secondary charge transport mechanism (tunneling, hopping). Furthermore, we develop a stretchable silicone-based ECC which, through the incorporation of a special additive, can form and sinter nanoparticles on the surface of the metallic conductive fillers. This sintering process decreases the contact resistance and enhances conductivity of the composite. The conductive composite developed has the best reported conductivity, stretchability and reliability. Using this S-ECC we fabricate a stretchable microstrip line with good performance up to 6 GHz and a stretchable antenna with good return loss and bandwidth. The work presented provides a foundation to create high performance stretchable electronic packages and radio frequency devices for curvilinear spaces. Future development of these technologies will enable the fabrication of ultra-low stress large area interconnects, reconfigurable antennas and other electronic and RF devices where the ability to flex and stretch provides additional functionality impossible using conventional rigid electronics.
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Weber, Mark 1964. "The processing and properties of electrically conductive fiber composites." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40279.

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The electrical and mechanical properties of electrically conductive fiber composites were measured and related to composite microstructure. Samples were manufactured by compression molding, extrusion, and injection molding to determine the effect of processing method on fiber length and orientation. A strong correlation between the processing-induced fiber-phase microstructure and the measured properties is found. The results are highly dependent on the type of conductive fiber. Computer-generated flow-field models are able to illustrate the thermal and flow processes which affect microstructure. A simple orientation model gives good qualitative agreement with experimental observations in injection molded composites.
Two models for predicting volume resistivity are proposed. One model assumes that the fibers are aligned end-to-end, and the effect of fiber orientation and concentration is obtained. The results agree qualitatively with experimental data, and give a lower bound or resistivity. More realistic fiber-fiber contacts are considered in the second model. The resistivity is expressed in terms of the area of contact, and orientation, length, and concentration of the fibers. Model predictions are in excellent agreement with experimental results.
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MOURA, DOS SANTOS ROSANE. "Development of a Novel Electrically Conductive Flame Retardant Bio-based Thermoplastic Polyurethane." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2589612.

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The central topic of this thesis was the design and development of a bi-functional thermoplastic polyurethane (TPU) composite, which is halogen-free bio-based flame retardant (UL94-V0) with an electrical resistivity ≤ 1000 Ω.cm and a filler load that does not exceed 25 wt.%. In order to reach this goal, the experimental activities were divided into the following tasks: (a) materials pre-selection, (b) design of experiment (DOE), (c) materials compounding, (d) specimens preparation (injection moulding), and (e) materials characterization (electrical resistivity tests, flammability tests, and microstructure analysis). In other words, the main tasks were identifying the ingredients (in a first stage) and defining the optimal proportions of additives (in a second stage) capable of simultaneously conferring to the polymer of interest the most desirable values of flame retardancy (as high as possible) and electrical resistivity (as low as possible); followed by the material preparation (third stage) and the material characterization (forth stage). The materials (flame retardants and electrically conductive additives) used in the development of this novel formulation were pre-selected mainly based on bibliographical studies. Then, the experimental activities and the analysis of the test results allowed to identify positive and negative effects among the components of the formulation such as synergistic effects among flame retardants on the improvement of the fire resistant performance. The obtained final formulation accomplished the desired target values of flame retardancy (V0 compliant) and electrical resistivity (≤1000 Ω.cm). It was compared to commercial products from the companies RTP, BASF and LUBRIZOL, which are used in the same field of application. The material developed during this work showed a lower electrical resistivity than these commercially available products while being bio-based and V0 (UL-94 test) at the same time. In addition, an innovative online acquisition apparatus for monitoring the surface growth of flame retardant protective layers was designed and developed during this thesis, which provided a deep insight of the dynamic behaviour of a phosphorous-based flame retarded material. The measurement of the surface protective layer growth rate provided a better understanding of the behaviour of the flame retardant systems, correlating the speed of the chemical reaction with the performances of the material.
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Tsotra, Panagotia [Verfasser], and Klaus [Akademischer Betreuer] Friedrich. "Electrically Conductive Epoxy Matrix Composites / Panagotia Tsotra ; Betreuer: Klaus Friedrich." Kaiserslautern : Technische Universität Kaiserslautern, 2004. http://d-nb.info/1179776925/34.

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Li, Zhuo. "Rational design of electrically conductive polymer composites for electronic packaging." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53454.

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Electrically conductive polymer composites, i.e. polymers filled with conductive fillers, may display a broad range of electrical properties. A rational design of fillers, filler surface chemistry and filler loading can tune the electrical properties of the composites to meet the requirements of specific applications. In this dissertation, two studies were discussed. In the first study, highly conductive composites with electrical conductivity close to that of pure metals were developed as environmentally-friendly alternatives to tin/lead solder in electronic packaging. Conventional conductive composites with silver fillers have an electrical conductivity 1~2 orders of magnitude lower than that of pure, even at filler loadings as high as 80-90 wt.%. It is found that the low conductivity of the polymer composites mainly results from the thin layer of insulating lubricant on commercial silver flakes. In this work, by modifying the functional groups in polymer backbones, the lubricant layer on silver could be chemically reduced in-situ to generate silver nanoparticles. Furthermore, these nanoparticles could sinter to form metallurgical bonds during the curing of the polymer matrix. This resulted in a significant electrical conductivity enhancement up to 10 times, without sacrificing the processability of the composite or adding extraneous steps. This method was also applied to develop highly flexible/stretchable conductors as building block for flexible/stretchable electronics. In the second study, a moderately conductive carbon/polymer composite was developed for use in sensors to monitor the thermal aging of insulation components in nuclear power plants. During thermal aging, the polymer matrix of this composite shrank while the carbon fillers remained intact, leading to a slight increase in filler loading and a substantial decrease in the resistivity of the sensors. The resistivity change was used to correlate with the aging time and to predict the need for maintenance of the insulation component according to Arrhenius’ equation. This aging sensor realized real-time, non-destructive monitoring capability for the aging of the target insulation component for the first time.
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Kim, Woo-Jin. "Design of electrically and thermally conductive polymer composites for electronic packaging /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/7055.

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Barakati, Amir. "Dynamic interactions of electromagnetic and mechanical fields in electrically conductive anisotropic composites." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3562.

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Recent advances in manufacturing of multifunctional materials have provided opportunities to develop structures that possess superior mechanical properties with other concurrent capabilities such as sensing, self-healing, electromagnetic and heat functionality. The idea is to fabricate components that can integrate multiple capabilities in order to develop lighter and more efficient structures. In this regard, due to their combined structural and electrical functionalities, electrically conductive carbon fiber reinforced polymer (CFRP) matrix composites have been used in a wide variety of applications in most of which they are exposed to unwanted impact-like mechanical loads. Experimental data have suggested that the application of an electromagnetic field at the moment of the impact can significantly reduce the damage in CFRP composites. However, the observations still need to be investigated carefully for practical applications. Furthermore, as the nature of the interactions between the electro-magneto-thermo-mechanical fields is very complicated, no analytical solutions can be found in the literature for the problem. In the present thesis, the effects of coupling between the electromagnetic and mechanical fields in electrically conductive anisotropic composite plates are studied. In particular, carbon fiber polymer matrix (CFRP) composites subjected to an impact-like mechanical load, pulsed electric current, and immersed in the magnetic field of constant magnitude are considered. The analysis is based on simultaneous solving of the system of nonlinear partial differential equations, including equations of motion and Maxwell's equations. Physics-based hypotheses for electro-magneto-mechanical coupling in transversely isotropic composite plates and dimension reduction solution procedures for the nonlinear system of the governing equations have been used to reduce the three-dimensional system to a two-dimensional (2D) form. A numerical solution procedure for the resulting 2D nonlinear mixed system of hyperbolic and parabolic partial differential equations has been developed, which consists of a sequential application of time and spatial integrations and quasilinearization. Extensive computational analysis of the response of the CFRP composite plates subjected to concurrent applications of different electromagnetic and mechanical loads has been conducted. The results of this work verify the results of the previous experimental studies on the subject and yield some suggestions for the characteristics of the electromagnetic load to create an optimum impact response of the composite.
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Books on the topic "Electrically conductive thermoplastic composites"

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Khan, Anish, Mohammad Jawaid, Aftab Aslam Parwaz Khan, and Abdullah M. Asiri, eds. Electrically Conductive Polymer and Polymer Composites. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.

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Asiri, Abdullah M., Mohammad Jawaid, Anish Khan, and Aftab Aslam Parwaz Khan. Electrically Conductive Polymers and Polymer Composites: From Synthesis to Biomedical Applications. Wiley & Sons, Incorporated, John, 2017.

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Asiri, Abdullah M., Mohammad Jawaid, Anish Khan, and Aftab Aslam Parwaz Khan. Electrically Conductive Polymers and Polymer Composites: From Synthesis to Biomedical Applications. Wiley & Sons, Incorporated, John, 2017.

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Asiri, Abdullah M., Mohammad Jawaid, Anish Khan, and Aftab Aslam Parwaz Khan. Electrically Conductive Polymers and Polymer Composites: From Synthesis to Biomedical Applications. Wiley & Sons, Limited, John, 2018.

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Asiri, Abdullah M., Mohammad Jawaid, Anish Khan, and Aftab Aslam Parwaz Khan. Electrically Conductive Polymers and Polymer Composites: From Synthesis to Biomedical Applications. Wiley & Sons, Incorporated, John, 2017.

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Asiri, Abdullah M., Mohammad Jawaid, Anish Khan, and Aftab Aslam Parwaz Khan. Electrically Conductive Polymers and Polymer Composites: From Synthesis to Biomedical Applications. Wiley-VCH, 2018.

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Book chapters on the topic "Electrically conductive thermoplastic composites"

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Goor, Gianpietro, Peter Sägesser, and Karl Berroth. "Electrically Conductive Ceramic Composites." In Advanced Multilayered and Fibre-Reinforced Composites, 311–22. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-007-0868-6_20.

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Gul’, V. E. "Selection of electrically conductive filler." In Structure and Properties of Conducting Polymer Composites, 61–146. London: CRC Press, 2023. http://dx.doi.org/10.1201/9780429070273-3.

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Krupa, Igor, Jan Prokeš, Ivo Křivka, and Zdeno špitalský. "Electrically Conductive Polymeric Composites and Nanocomposites." In Handbook of Multiphase Polymer Systems, 425–77. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119972020.ch11.

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Spahr, Michael E., Raffaele Gilardi, and Daniele Bonacchi. "Carbon Black for Electrically Conductive Polymer Applications." In Encyclopedia of Polymers and Composites, 1–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37179-0_32-1.

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Kang, T. J., Y. Miyaki, J. H. Han, T. Motobe, Y. E. Whang, and S. Miyata. "Highly Electrically Conductive Polymer Composites and Blends." In Progress in Pacific Polymer Science 3, 307–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78759-1_26.

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Khan, Ziyauddin, Ravi Shanker, Dooseung Um, Amit Jaiswal, and Hyunhyub Ko. "Bioinspired Polydopamine and Composites for Biomedical Applications." In Electrically Conductive Polymer and Polymer Composites, 1–29. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.ch1.

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Shahadat, Mohammad, Shaikh Z. Ahammad, Syed A. Wazed, and Suzylawati Ismail. "Synthesis of Polyaniline-Based Nanocomposite Materials and Their Biomedical Applications." In Electrically Conductive Polymer and Polymer Composites, 199–218. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.ch10.

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Haryanto and Mohammad Mansoob Khan. "Electrically Conductive Polymers and Composites for Biomedical Applications." In Electrically Conductive Polymer and Polymer Composites, 219–35. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.ch11.

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Khan, Imran, Weqar A. Siddiqui, Shahid P. Ansari, Shakeel khan, Mohammad Mujahid Ali khan, Anish Khan, and Salem A. Hamid. "Multifunctional Polymer-Dilute Magnetic Conductor and Bio-Devices." In Electrically Conductive Polymer and Polymer Composites, 31–46. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.ch2.

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Khan, Anish, Aftab Aslam Parwaz Khan, Abdullah M. Asiri, Salman A. Khan, Imran Khan, and Mohammad Mujahid Ali Khan. "Polymer-Inorganic Nanocomposite and Biosensors." In Electrically Conductive Polymer and Polymer Composites, 47–68. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527807918.ch3.

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Conference papers on the topic "Electrically conductive thermoplastic composites"

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Tariq, Muhammad, Nabeel Ahmed Syed, Utkarsh Utkarsh, Amir Hossein Behravesh, Remon Pop-Iliev, and Ghaus Rizvi. "Investigation of different bonding matrices for the development of electrically conductive thermoplastic composites." In PROCEEDINGS OF THE 37TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-37). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0168279.

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Danescu, R. I., and D. A. Zumbrunnen. "Creation of Conducting Networks of Particles in Polymer Melts by Chaotic Mixing." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0642.

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Abstract Chaotic mixing of a nonconducting thermoplastic melt and initially coarse clusters of conducting particles has been investigated to assess opportunities for the in-situ formation of extended particle networks. Upon capture by solidification, such extended networks may render the composite electrically conducting. Chaotic advection of small, spherical, non-interacting particles was studied computationally and experimentally ill a cavity formed between two offset cylinders. Numerical tracking of individual particles was performed under conditions where global chaotic mixing prevailed. Formation mechanisms were identified at various stages of mixing. After mixing, networks comprising interconnected particles were identified as electrical pathways. Micrographs of composites produced experimentally by two-dimensional chaotic mixing of thermoplastics with conducting carbon black showed structures resembling those predicted by the simulations and provided further insights into formation mechanisms. The electrical resistivity of the composites is also compared to composites produced by conventional means.
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MARTIN, ROMAIN G., CHRISTER JOHANSSON, JASON R. TAVARES, and MARTINE DUBÉ. "HEATING RATE PREDICTION FOR INDUCTION WELDING MAGNETIC SUSCEPTORS." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35740.

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Induction welding involves generating heat by applying an oscillating magnetic field, which produces eddy currents and Joule losses in an electrically-conductive material or hysteresis losses in a magnetic material. Most applications rely on eddy currents generation as composites are often made of electrically-conductive carbon fibres. However, in other applications, heat can be produced by a magnetic susceptor located at the weld interface of the parts to be joined. Composite films of magnetic particles dispersed in a thermoplastic matrix can serve as magnetic susceptors. Magnetic particles selection relies on various parameters that must be thoroughly defined beforehand. Firstly, the applied magnetic field amplitude and frequency is calculated, based on the generated current and the induction coil geometry. Secondly, the thermoplastic matrix is characterized, mainly with DSC measurements, to define its processing window. Finally, the magnetic properties of the particles are measured – for instance using a vibrating sample magnetometer (VSM) – to obtain the hysteresis curve for the applied field. The enclosed surface area of the hysteresis curve (i.e. absorbed energy density) is critical, as low hysteresis materials (i.e. soft magnets) will not dissipate enough heat, while high hysteresis materials (i.e. hard magnets) cannot be fully exploited as the saturation hysteresis is not reached within the used field amplitude. A methodology to approximate the hysteresis enclosed surface area with limited data is proposed, helping to anticipate the heating rate of a susceptor candidate material. Based on these parameters, the theoretical heating rates of three magnetic susceptor materials (magnetic particles of iron, nickel and magnetite) for induction welding are calculated. They are verified experimentally by comparing with the hysteresis analysis and by measuring the temperature evolution of samples made of polypropylene containing the magnetic particles.
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Villarreal, Anthony A., Constantine Tarawneh, Miguel Ontiveros, James Aranda, and Robert Jones. "Prototyping a Conductive Polymer Steering Pad for Rail Freight Service." In 2019 Joint Rail Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/jrc2019-1286.

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The AdapterPlus™ steering pad is a polymer component on a railcar that helps to reduce stresses on the axle as a railcar rounds a curve. One railway application requires a minimum of 240 mA to be passed through the steering pad to the rail, which activates air valves that control automated cargo gates. Currently, two copper studs are inserted into the pad to provide a conductive path. However, after continuous cyclic loading caused by normal service operation, the copper studs deform, wear, and eventually lose contact between the two surfaces rendering the pad nonconductive. One proposed solution to this problem is to create a steering pad made entirely from an electrically conductive material. The University Transportation Center for Railway Safety (UTCRS) research team has successfully created a conductive nanocomposite made from vapor grown carbon nanofibers (CNFs) and a modified form of Elastollan 1195A thermoplastic polyurethane (TPU). Previous attempts to create this material were promising but failed to produce an electrically conductive specimen when injection molded. Preliminary results have shown that the new material can be injection molded to create an electrically conductive test specimen. An injection molded insert was designed, fabricated, and incorporated into the existing steering pad design for further testing. Pressure measurement film had previously been used to find the points of maximum stress inside the pad to optimize the design of the composite insert. Characterization of the resistivity of the composite material was carried out in order to verify functionality in future iterations of this product. The resistance of the composite material is expected to be non-linear with a strong dependence on load and voltage. Conductivity tests were performed using a material testing system with a compressive load ranging from 1500 pounds to 5500 pounds. The voltage at each load was also varied between 10V to 20V and the nonlinear resistance of the material was examined. The results have shown that the CNF/TPU composite is a potential replacement for the current TPU used for the pad and, with minimal modifications, can be implemented in field service operation.
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Aguilera, Jesse, Constantine Tarawneh, Harry Siegel, Robert Jones, and Santana Gutierrez. "Conductive Polymer Pad for Use in Freight Railcar Bearing Adapters." In 2022 Joint Rail Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/jrc2022-78217.

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Abstract Many freight railcars rest on polymer adapter pads made of injection-molded Thermoplastic Polyurethane (TPU) polymers which feature two copper studs to provide electrical conductivity through the pad. This design feature allows signal transmission from the track to the onboard systems, including cargo gates and pneumatic actuators. While in service, the polymer pads experience impact and cyclic loading that produce shear, resulting in the abrasive wear and plastic compression of the copper studs which leads to signal interruptions and loss of function requiring the periodic replacement of these polymer pads. This causes increased downtime due to maintenance and reduced reliability in the automated systems since pad failure is unpredictable. This limitation in current designs is the driving concern behind the effort to create an electrically conductive polymer adapter pad that would provide a durable conductive path between the rail and freight car side-frame. To that end, the University Transportation Center for Railway Safety (UTCRS) has been working on developing a conductive composite blend of TPU and Carbon Nano Fibers (CNF) to create injection-molded polymer composite inserts that can provide the necessary conductivity without the need for the copper studs that are susceptible to wear. Previous work done on this project was successful in creating a TPU-CNF composite insert that provided the required electrical conductivity at full railcar loads but was inconsistent at empty railcar loads. Thus, current work presented here focused on studying the fiber orientation that would produce consistent conductivity at all railcar loads. Based on these findings, a new mold was fabricated to create injection-molded polymer composite inserts with the effective fiber orientation. Laboratory test results show that the newly created composite inserts provide approximately double the needed conductivity required for a 24-Volt railcar valve to actuate when tested under the minimum load conditions an adapter would experience in field service. This paper summarizes the work done on fiber alignment and the results of the testing performed on the UTCRS dynamic bearing test rigs.
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Nunes, Joao P., Joao F. Silva, and Paulo J. Antunes. "Domestic Gas Cylinders Manufactured by Using a Composite Hybrid Steel Glass Reinforced Thermoplastic Matrix Solution." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25822.

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The use of polymer composites allows effectively minimizing the weight, improving aesthetics, promoting handling, and also increasing the vessels mechanical, impact, and corrosion behavior [1]. Since filament winding technique appeared in late 1950s as very suitable production process to manufacture rotationally advanced structures [2–7], such as rocket engine cases, an extensive work has been carried out on the development of new processing possibilities. The improvements occurred until the 1980s as consequence of the computer evolution, give finally birth to the modern polar and multi-axle CNC-controlled filament winding machines that are easily integrated in CAD/CAM environments and allow process almost all exotic shapes with very high accurate fiber placement, speed, and quality control [8]. In this work, continuous glass/polypropylene (GF/PP) commingled fiber tapes were employed to produce wrapped pressure gas vessels for domestic applications by using filament winding. The vessel structural-wall was built using a hybrid solution consisting in a very thin steel liner over wrapped by the filament wounded GF/PP commingled fiber tape layers. FEM analysis was used to evaluate if the composite gas pressure vessel based on the hybrid solution (steel liner plus glass fiber reinforced thermoplastic) is capable to withstand the following pressure requirements: the metallic liner, alone, a minimum burst pressure of 4MPa and whole hybrid composite vessel minima internal test and burst pressures of 3MPa and 6.75 MPa, respectively. Finally, gas pressure vessel prototypes manufactured in industrial conditions were submitted to burst pressure and electrostatic tests to prove that they accomplish all European standard strength requirements. The electrostatic tests were made to evaluate the risk of dangerous electrostatic discharges occurring in the worst service conditions described in the Annex C of the EN 13463-1 standard [9]. Two types of electrostatic discharge risks were evaluated: i) possibility of the brush discharge occur from the external non-conductive surface of the composite cylinders due to the accumulation of electrical charges generated in service by rubbing or contact of the cylinder with a high voltage power supply, and ii) possibility of the brush discharge occur through the gas cylinder metallic conductive filling valve due to the accumulation of electrical charges on the internal steel liner as result from the normal service cylinder shaking.
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Thaler, Dominic, Nahal Aliheidari, and Amir Ameli. "Electrical Properties of Additively Manufactured Acrylonitrile Butadiene Styrene/Carbon Nanotube Nanocomposite." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8002.

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Additive manufacturing is an emerging method to produce customized parts with functional materials without big investments. As one of the common additive manufacturing methods, fused deposition modeling (FDM) uses thermoplastic-based feedstock. It has been recently adapted to fabricate composite materials too. Acrylonitrile butadiene styrene (ABS) is the most widely used material as FDM feedstock. However, it is an electrically insulating polymer. Carbon Nanotubes (CNTs) on the other hand are highly conductive. They are attractive fillers because of their high aspect ratio, and excellent mechanical and physical properties. Therefore, a nanocomposite of these two materials can give an electrically conductive material that is potentially compatible with FDM printing. This work focuses on the investigation of the relationships between the FDM process parameters and the electrical conductivity of the printed ABS/CNT nanocomposites. Nanocomposite filaments with CNT contents up to 10wt% were produced using a twin-screw extruder followed by 3D printing using FDM method. The starting material was pellets from a masterbatch containing 15 wt% CNT. Compression-molded samples of ABS/CNT were also prepared as the bulk baselines. The effects of CNT content and nozzle size on the through-layer and in-layer electrical conductivity of the printed nanocomposites were analyzed. Overall, a higher percolation threshold was observed in the printed samples, compared to that of the compression-molded counterparts. This resulted in the conductivity of the printed samples that is at least one order of magnitude lower. Moreover, at CNT contents up to 5 wt%, the in-layer conductivity of the printed samples was almost two orders of magnitudes higher than that in the through-layer direction. In ABS/3 wt% CNT samples, the through-layer conductivity continuously decreased as the nozzle diameter was decreased from 0.8 mm to 0.35 mm. These variations in the electrical conductivity were explained in terms of the CNT alignment, caused by the extrusion process during the print, quality of interlayer bonding during deposition, and the voids created due to the discrete nature of the printing process.
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Xu, Weiheng, Dharneedar Ravichandran, Sayli Jambhulkar, Yuxiang Zhu, and Kenan Song. "Fabrication of Multilayered Polymer Composite Fibers for Enhanced Functionalities." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-64039.

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Abstract Carbon nanoparticles-based polymer composites have wide applications across different fields for their unique functional properties, durability, and chemical stability. When combining nanoparticle morphologies with micro- or macro-scale morphologies, the hierarchal structure often would greatly enhance the composites’ functionalities. Here in this work, a thermoplastic polyurethane (TPU) and graphene nanoplatelets (GnPs) based multilayered fiber is fabricated through the combination of dry-jet-wet spinning, based on an in-house designed spinneret which accommodates three layers spinning solution, and hot isostatic pressing (HIP), at 220 °C. The multilayered spinneret enables the spinnability of a high GnPs loaded spinning dope, highly elastic, with great mechanical strength, elongation, and flexibility. The HIP process resulted in superior electrical properties as well as a newly emerged fourth hollow layer. Together, such a scalable fabrication method promotes a piezoresistive sensor that is sensitive to uniaxial strain and radial air pressure. The hollow fiber is characterized based on surface morphologies, layer formation, percolation threshold, piezoresistive gauge factor, mechanical stability and reversibility, and air-pressure sensitivity and reversibility. Such facile fabrication methods and unique structures have combined the mechanically robust outer shell with a highly conductive middle sensing layer for a new sensor with great potentials in wearable, robotics, biomedical, and other areas.
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Danescu, R. I., and D. A. Zumbrunnen. "Particle Transport via Three-Dimensional Chaotic Advection to Produce Electrically Conducting Plastics With Powder Additives." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1072.

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Abstract Extended micron-scale structures were produced in thermoplastic melts from initially large clusters of conducting carbon black particles transported by three-dimensional chaotic mixing. The structures formed networks that were captured by solidification and rendered the composite materials electrically conducting. A systematic study was carried out to assess the influence of key parameters and relate the electrical properties to the microstructures. Micrographs showed complex structures exhibiting patterns characteristic of chaos. Electrical measurements indicated that conductivity was achieved at carbon black concentrations significantly lower than achievable by common mixing methods, and lower than reported recently for two-dimensional chaotic mixing.
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Wu, Haoyi, Cheng Yang, Jingping Liu, Xiaoya Cui, Binghe Xie, and Zhexu Zhang. "A highly conductive thermoplastic electrically conductive adhesive for flexible and low cost electronics." In 2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM). IEEE, 2014. http://dx.doi.org/10.1109/isaf.2014.6918157.

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