Готові списки джерел за темами / Copolymers Electric properties

Добірка наукової літератури з теми "Copolymers Electric properties"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Copolymers Electric properties"

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Pascual-Jose, B., Alireza Zare, Silvia De la Flor, José Antonio Reina, M. Giamberini, and A. Ribes-Greus. "Dielectric Properties in Oriented and Unoriented Membranes Based on Poly(Epichlorohydrin-co-Ethylene Oxide) Copolymers: Part III." Polymers 14, no. 7 (March 28, 2022): 1369. http://dx.doi.org/10.3390/polym14071369.

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The dielectric spectra and conductivity properties of neat poly(epichlorohydrin-co-ethylene oxide)(PECH-co-EO) copolymer and two modified copolymers with a 20% or 40% of dendron 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy] benzoate units were analysed. A process of thermal orientation was applied to the copolymers to fine-tune the molecular motion of the side chains and determine their validity for cation transport materials. The study was conducted using Dielectric Thermal Analysis (DETA). The spectra of the modified unoriented and oriented copolymers consisted of five dielectric relaxations (δ, γ, β, αTg, and αmelting). The analysis of the relaxations processes shows that as the grafting with the dendron units increases, both the lateral and main chains have a greater difficulty moving. The thermal orientation induces in the main chain partial crystallization, including the polyether segments, and modifies the cooperative motion of the main chain associated with the glass transition (αTg). A deep analysis of the electrical loss modulus revealed that the degree of modification only modifies the temperature peak of each relaxation, and this effect is more perceived if the dendron unit content is higher (40%). The thermal orientation process seems equal to the spectra of CP20-O and CP40-O to the point that the degree of modification does not matter. Nevertheless, the fragility index denotes the differences in the molecular motion between both copolymers (40% and 20%) due to the thermal orientation. The study of the electric conductivity showed that the ideal long-range pathways were being altered by neither the thermal orientation process nor the addition of dendrimers. The analysis of the through-plane proton conductivity confirmed that the oriented copolymer with the highest concentration of dendrimers was the best performer and the most suitable copolymer for proton transport materials.
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Seo, Hyeon Myeong, Jin Ho Park, Trung Dung Dao, and Han Mo Jeong. "Compatibility of Functionalized Graphene with Polyethylene and Its Copolymers." Journal of Nanomaterials 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/805201.

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The compatibility of polyethylene (PE) with a functionalized graphene sheet (FGS), which was prepared by the thermal reduction of graphite oxide, was examined in this study. The dispersion of the FGS in the PE was improved as the molecular weight of the PE was decreased. The PE copolymers containing polar comonomers such as maleic anhydride or acrylic acid exhibited better compatibility with FGS than the PE homopolymers. The compatibility of the FGS with PE copolymers containing small amounts of comonomers, which have a solubility parameter slightly larger [up to approximately 0.5 (J/cm3)1/2] than that of PE itself, was better than the compatibility of both the PE and PE copolymers containing larger amounts of comonomers. The morphology, electric conductivity, and tensile properties of FGS/PE copolymer/PE nanocomposites showed that the copolymers with a solubility parameter slightly larger than that of PE effectively served as a compatibilizer in FGS/PE nanocomposites.
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3

Sandu, Viorel, Stelian Popa, Ion Ivan, Carmen Plapcianu, Elena Sandu, Camelia Mihailescu, and Florica Doroftei. "Fabrication and Transport Properties of Manganite-Polyacrylamide-Based Composites." Journal of Nanomaterials 2009 (2009): 1–5. http://dx.doi.org/10.1155/2009/429430.

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We present the fabrication and transport properties of a series of composites made ofLa2/3Sr1/3MnO3and acrylamide-based copolymers. The most important result is the very narrow transition, of only 27 K, displayed by the peak that appears around the metal-insulator transition of the composites made with poly(acrylamide-vinylacetate). Although the amount of polymer is rather low, different copolymers change drastically the electric transport characteristics.
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Eesaee, Mostafa, Eric David, Nicole R. Demarquette, and Davide Fabiani. "Electrical Breakdown Properties of Clay-Based LDPE Blends and Nanocomposites." Journal of Nanomaterials 2018 (2018): 1–17. http://dx.doi.org/10.1155/2018/7921725.

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Microstructure and electrical breakdown properties of blends and nanocomposites based on low-density polyethylene (LDPE) have been discussed. A series of LDPE nanocomposites containing different amount of organomodified montmorillonite (clay) with and without compatibilizer have been prepared by means of melt compounding. Two sets of blends of LDPE with two grades of Styrene-Ethylene-Butylene-Styrene block copolymers have been prepared to form cocontinuous structure and host the nanoreinforcement. A high degree of dispersion of oriented clay was observed through X-ray diffraction, scanning, and transmission electron microscopy. This was confirmed by the solid-like behavior of storage modulus in low frequencies in rheological measurement results. An alteration in the morphology of blends was witnessed upon addition of clay where the transportation phenomenon to the copolymer phase resulted in a downsizing on the domain size of the constituents of the immiscible blends. The AC breakdown strength of nanocomposites significantly increased when clay was incorporated. The partially exfoliated and intercalated clay platelets are believed to distribute the electric stress and prolong the breakdown time by creating a tortuous path for charge carriers. However, the incorporation of clay has been shown to diminish the DC breakdown strength of nanocomposites, mostly due to the thermal instability brought by clay.
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Cho, Kie Yong, Ara Cho, Hyun-Ji Kim, Sang-Hee Park, Chong Min Koo, Young Je Kwark, Ho Gyu Yoon, Seung Sang Hwang, and Kyung-Youl Baek. "Control of hard block segments of methacrylate-based triblock copolymers for enhanced electromechanical performance." Polymer Chemistry 7, no. 48 (2016): 7391–99. http://dx.doi.org/10.1039/c6py01868h.

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A series of well-defined hard–soft–hard triblock copolymers with various hard block segments were synthesized by Ru-based atom transfer radical polymerization (ATRP) (MWD < 1.26) in order to examine their electromechanical properties under electric fields.
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Nurabay, Nazerke, M. Abutalip, Raikhan Rakhmetullayeva, and Grigoriy Mun. "Development of the technology for obtaining new hydrogel materials based on acrylic monomers." Chemical Bulletin of Kazakh National University, no. 4 (December 27, 2017): 20–29. http://dx.doi.org/10.15328/cb959.

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Smart water-soluble polymers and hydrogels are capable to reversibly react to insignificant changes of the medium properties (pH, temperature, ionic strength, a presence of some substances, illumination, electric field). The reacting of a system is visible to the naked eye (the formation of a new phase in a homogeneous solution, or compression of the hydrogel). The properties of such polymers and hydrogels are considered. For the first time, the stimuli-responsive polymeric hydrogels based on N-isopropylacrylamide (NIPAAM), 2-hydroxyethyl acrylate (HEA) and acrylic acid (AA) have been synthesized by free initiation of radical copolymerization. The purpose of the research is to obtain stimuli-responsive cross-linked terpolymers based on N-isopropylacrylamide, 2-hydroxyethyl acrylate and acrylic acid and study their physicochemical properties. The physicochemical methods such as scanning electron microscopy, differential scanning calorimetry, infrared spectroscopy, gravimetry, cathetometric and thermogravimetric analyses were used in this study. To determine the thermal and pH – sensitivity of the modified copolymer, the effect of temperature on the NIPAAM-НEA-AA nets (in different pH media) was studied. They are characterized by a thermally induced collapse and a dependence on a medium pH. The interaction of copolymers with drugs such as lincomycin and gentamicin was studied for using the new copolymers as a drug carrier. To study the antibacterial properties and the transportation of physiologically active substances of hydrogel, the elimination of specially prepared bacteria by hydrogels with various medicinal ingredients were conducted.
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Chávez-Castillo, Marilú, Arelis Ledesma-Juárez, Marisol Güizado-Rodríguez, Jesús Castrellón-Uribe, Gabriel Ramos-Ortiz, Mario Rodríguez, José-Luis Maldonado, Jorge-Antonio Guerrero-Álvarez, and Victor Barba. "Third-Order Nonlinear Optical Behavior of Novel Polythiophene Derivatives Functionalized with Disperse Red 19 Chromophore." International Journal of Polymer Science 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/219361.

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Two copolymers of 3-alkylthiophene (alkyl = hexyl, octyl) and a thiophene functionalized with disperse red 19 (TDR19) as chromophore side chain were synthesized by oxidative polymerization. The synthetic procedure was easy to perform, cost-effective, and highly versatile. The molecular structure, molecular weight distribution, film morphology, and optical and thermal properties of these polythiophene derivatives were determined by NMR, FT-IR, UV-Vis GPC, DSC-TGA, and AFM. The third-order nonlinear optical response of these materials was performed with nanosecond and femtosecond laser pulses by using the third-harmonic generation (THG) andZ-scan techniques at infrared wavelengths of 1300 and 800 nm, respectively. From these experiments it was observed that although the TRD19 incorporation into the side chain of the copolymers was lower than 5%, it was sufficient to increase their nonlinear response in solid state. For instance, the third-order nonlinear electric susceptibility (χ3) of solid thin films made of these copolymers exhibited an increment of nearly 60% when TDR19 incorporation increased from 3% to 5%. In solution, the copolymers exhibited similar two-photon absorption cross sectionsσ2PAwith a maximum value of 8545 GM and 233 GM (1 GM = 10−50 cm4 s) per repeated monomeric unit.
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Neyolova, O. V., L. M. Kubalova, and T. A. Panova. "Polyorganosiloxane block-copolymers with linear-ladder structure, intended for production of heat-resistant protective coatings." Adhesives. Sealants. Technologias, no. 11 (2021): 2–11. http://dx.doi.org/10.31044/1813-7008-2021-0-11-2-11.

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The development possibility of new organic-silicon compounds based on solutions of linear-ladder block-copolymers in an organic dissolvent, allowing one to produce heat-resistant electric insulating elastomer coatings possessing optimal physical-chemical properties, has been studied. The compounds are intended for production of heat-resistant protective coatings used in the electronic and radio-engineering instrument making, as well as for the thermal protection of products of aircraft building, rocket production, machine building and other equipment
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Mayer, Alexander, Dominik Steinle, Stefano Passerini, and Dominic Bresser. "Block copolymers as (single-ion conducting) lithium battery electrolytes." Nanotechnology 33, no. 6 (November 15, 2021): 062002. http://dx.doi.org/10.1088/1361-6528/ac2e21.

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Abstract Solid-state batteries are considered the next big step towards the realization of intrinsically safer high-energy lithium batteries for the steadily increasing implementation of this technology in electronic devices and particularly, electric vehicles. However, so far only electrolytes based on poly(ethylene oxide) have been successfully commercialized despite their limited stability towards oxidation and low ionic conductivity at room temperature. Block copolymer (BCP) electrolytes are believed to provide significant advantages thanks to their tailorable properties. Thus, research activities in this field have been continuously expanding in recent years with great progress to enhance their performance and deepen the understanding towards the interplay between their chemistry, structure, electrochemical properties, and charge transport mechanism. Herein, we review this progress with a specific focus on the block-copolymer nanostructure and ionic conductivity, the latest works, as well as the early studies that are fr"equently overlooked by researchers newly entering this field. Moreover, we discuss the impact of adding a lithium salt in comparison to single-ion conducting BCP electrolytes along with the encouraging features of these materials and the remaining challenges that are yet to be solved.
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10

Sandu, Viorel, Stelian Popa, C. Plapcianu, Elena Sandu, N. Hurduc, and I. Nor. "Transport and Magnetic Properties of CrO2-Polymer Magnetic Composites." Advanced Materials Research 47-50 (June 2008): 326–30. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.326.

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We report the transport and magnetic properties of sintered CrO2-polymer composites. In order to improve the elastic properties of the CrO2-based composites, we investigated two types of styrene-based copolymers: poly(methyl methacrylate)-styrene (9/1 and 5/5) and linear polysiloxaneg- styrene as well as poly(methyl methacrylate)–butadiene 9/1. The electric transport and magnetoresistance are consistent with the spin tunneling model at low temperatures but the contribution of spin independent channels becomes important at high temperature and high fields. All composites display ferromagnetism at room temperature with saturation at low fields and a slightly temperature-dependent coercive field for the samples grafted either with butadiene or with styrene except for CrO2-polysiloxane-g-styrene composite where it exponentially decreases with increasing temperature.
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Дисертації з теми "Copolymers Electric properties"

1

Henderson, Paul Thomas. "Thiophene : alkylthiophene copolymers from substituted oligothiophenes." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/30555.

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2

Tan, Kam Ho. "Synthesis and electrical properties of copolymers and blends of polyacetylene via poly(phenyl vinyl sulfoxide) precursor." HKBU Institutional Repository, 1992. http://repository.hkbu.edu.hk/etd_ra/16.

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3

Briceno, Garcia Ruben Dario. "Crosslinking of ethylene copolymers from epoxy chemistry." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0037.

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La plupart des couches d'isolation de câbles pour la moyenne tension "MV" et haute tension "HV" sont fabriquées en polyéthylène réticulé (XLPE) par voie peroxyde. L'impact des sous-produits de réaction sur les propriétés et la nécessité d'une étape de dégazage au cours du processus sont les principaux problèmes liés à cette technologie. Cette étude se concentre sur le développement d'une méthode de réticulation alternative sans les problèmes liés aux sous-produits. Des copolymères d’éthylène/époxy ont été réticulés thermiquement en utilisant un agent aminoacide pour créer des liaisons covalentes entre les fonctions époxydes. L’influence de différents paramètres sur la cinétique de réaction tels que la température de réticulation, les proportions aminoacide/époxy, la taille des particules de l’aminoacide et la teneur en époxy dans les copolymères a été étudiée par techniques de caractérisation telles que : rhéologie dynamique, spectrométrie FTIR, microscopie à balayage électronique et calorimétrie différentielle. En outre, l'étude de la structure du réseau avant et pendant un vieillissement thermique a été effectuée par différentes techniques (mesures de gonflement, spectroscopie FTIR, propriétés de traction et thermoporosimétrie) sur deux types de réseaux : un pré-contraint et un autre non-contraint. Enfin, une caractérisation des propriétés électriques par spectroscopie diélectriques et mesures de claquage électrique a été faite. Les résultats concernant les cinétiques de réaction, les propriétés thermomécaniques et le comportement électrique ont montré que la formulation développée dans cette étude peut être utilisée pour une application de câble
Most of insulation layers of cables for medium voltage “MV” and high voltage “HV” applications are made of crosslinked polyethylene (XLPE) by peroxide technology. The impact of reaction by-products on properties and the consequential need of a degassing stage during the process are the main problems related to this technology. This study focuses on the development of an alternative crosslinking method without by-products issues. Epoxy-ethylene copolymers were thermally crosslinked by using an amino-acid agent to create covalent cross-links between epoxide functions. Influence of several parameters on kinetic reactions such as crosslinking temperature, amino acid/epoxy proportions, size particle of amino acid and epoxy content in copolymers were studied by characterization techniques such as: dynamic rheology, FTIR spectrometry, SEM microscopy and differential calorimetry. In addition, study of the network structure before and during a thermal aging was done on a pre-constrained and a non-constrained network by different techniques (swelling ratio measurement, FTIR spectroscopy, tensile properties and thermoporosimetry analysis). Finally, a characterization of electrical properties by dielectric spectroscopy and breakdown measurements was done. Results related to reaction kinetic, thermo-mechanical properties and electrical behavior have shown that the developed formulation can be used for cable application
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Lightfoot, Philip Kenneth. "The preparation, properties and structure of poly-p-xylyene and its copolymers." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302158.

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Ryan, Kevin J. "Properties of PEG, PPG and their copolymers influence on the gap-fill characteristics of damascene interconnects." Thesis, State University of New York at Albany, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3566568.

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A laboratory scale plating cell was built that provided reproducible bottom-up fill results for the electrochemical deposition of copper in damascene features. Several techniques used in the full wafer plating tool were incorporated into the setup to accurately control the process conditions. These techniques included but were not limited to a voltage controlled `hot-entry' step, a custom coupon holder to allow sample rotation, a secondary thief electrode and an automatic entry system. The results of qualification experiments are presented to demonstrate that precise control was realized along with repeatable partial fill plating results. The qualified setup was then used to perform time-evolved partial fill plating experiments using several different structural configurations of open-source suppressors to investigate their affect on the gap-fill characteristics.

Common open-source suppressors used for copper filling of damascene interconnects include polyethylene glycol (PEG), polypropylene glycol (PPG), or a copolymer structure of both. Differences in the configuration and structure of these suppressors generate variations in polarization strength, surface adsorption rate, and SPS displacement rate. These properties were measured by electrochemical transient analysis and coupled with the results of time-evolved partial fill plating experiments to determine the effect of electrochemical property variations on the gap-fill characteristics. The high polarization strength of PPG, along with its greater dependence on concentration was found to greatly increase the bottom-up growth rate during copper filling, while the improved resistance to accelerator displacement of PEG resulted in better sidewall protection. Both these gap-fill characteristics were evident when PEG and PPG were combined together as a mixture of separate homopolymers or in copolymer structures, although the overall influence was dependent on the size and configuration of each component. These data sets provided a more fundamental understanding of PEG, PPG and their different configurations role in the metallization of damascene interconnects. These data can also be used to infer the relative gap-fill performance to screen new suppressor candidates and reduce the quantity of plating experiments by comparison of the electrochemical properties.

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Metera, Kimberly Lorrainne 1976. "Self-assembly, luminescence properties and excited state interactions of block copolymers that contain ruthenium tris(bipyridine)." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111909.

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This thesis describes the examination of novel block copolymers that contain Ru(bpy)32+ complexes incorporated into one block of diblock copolymers made by ROMP. With the intent of exploring the potential usefulness of these interesting materials in applications such as light-harvesting and sensing, a systematic study of the solution self-assembly, luminescence properties, and the ability of the metal complex to engage in electron and energy transfer reactions has been conducted.
The solution self-assembly of block copolymers that contain Ru(bpy) 32+ complexes was examined first. Using a series of these block copolymers, a detailed study of the effects of block length, block ratio, polymer concentration and solution conditions on the copolymer self-assembly is presented. Using TEM, a number of morphologies were reproducibly observed including star micelles, large compound micelles, tubules, and interestingly, vesicles. These structures all contain the metal complex Ru(bpy)3 2+ within their core domains.
The luminescence properties of two block copolymers containing Ru(bpy) 32+ were examined: one polymer self-assembled into star micelles, the other into vesicles. Comparison of the unassembled polymer chains and the self-assembled polymers indicated that self-assembly, and confinement of the Ru(bpy)32+ complexes into the core domains of the aggregates, did not seriously adversely affect the luminescence properties of the metal complex. Measurement of the luminescence lifetime decay of the polymers suggested that energy migration occurred among the metal complexes along the polymer chain. The ability of the metal complexes within self-assembled structures to participate in electron transfer reactions with small molecules was also explored. It was found that from within the core domains of self-assembled structures, the Ru(bpy)32+ complexes could still engage in electron transfer reactions with molecules on the outsides or the insides of the aggregates, likely a result of energy migration.
The ability of Ru(bpy)32+ complexes within the cores of micelles to participate in energy transfer was explored. Micelles were formed in aqueous solutions using polymers that possessed both the metal complex and a water-soluble block. Several methods were attempted to encapsulate two molecules, a derivative of coumarin 2 and an Os(bpy)3 2+-based molecule, inside these micelles. It was observed that Ru(bpy) 32+ could act as an energy acceptor from the coumarin derivative, and could act as an energy donor to the osmium-based complex. Encapsulation of the small molecules greatly enhanced the efficiency of energy transfer, by non-covalently bringing the small molecules in close proximity to the Ru(bpy)32+ complexes.
Polymers were synthesized that contained a Ru(bpy)3 2+-based block and were terminated with the molecular recognition unit biotin. These polymers, upon self-assembly, formed micelles with biotin groups on their periphery. The addition of the protein streptavidin, which has a strong binding affinity for biotin, resulted in the aggregation of the self-assembled structures. This established the potential for self-assembled metal-containing aggregates to form higher-order structures.
Early work is presented in Appendix A involving block copolymers that contain hydrogen-bonding groups. Several methods were attempted to elucidate the solution morphologies of these polymers, namely IR, 1H NMR, DLS, and pyrene fluorescence. The transition of this initial work to polymers that contain the Ru(bpy)32+ complex is also described.
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POVEDA, PATRICIA N. S. "Estudo do efeito da radiação por feixe de elétrons nas propriedades de filmes de copoliester alifático aromático." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11510.

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Made available in DSpace on 2014-10-09T12:52:42Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:02:59Z (GMT). No. of bitstreams: 0
Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Fragneaud, Benjamin Cavaillé Jean-Yves Terrones Maldonado Mauricio Gonzalez Montiel Alfonso. "Synthesis and characterization of polymer/carbon nanotubes composites impact of polymer grafting on the surface of CNx MWNTs on the electrical and mechanical properties of the nanocomposites /." Villeurbanne : Doc'INSA, 2007. http://docinsa.insa-lyon.fr/these/pont.php?id=fragneaud.

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Di, Pietro Riccardo, Tim Erdmann, Naixiang Wang, Xuhai Liu, David Gräfe, Johannes Lenz, Josef Brandt, et al. "The impact of molecular weight, air exposure and molecular doping on the charge transport properties and electronic defects in dithienyldiketopyrrolopyrrole- thieno[3,2-b]thiophene copolymers." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A36273.

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We performed an in-depth study of high molecular weight poly[3,6-(dithiophene-2-yl)-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thieno[3,2-b]thiophene] P(DPP2OD-TT) synthesized through the Stille coupling polycondensation in order to understand the correlation between molecular weight, processing conditions and charge transport. We observed a rapid increase in its aggregation in solution with increasing molecular weight which strongly limits the solubility and processability for weight average molecular weights beyond 200 kg mol⁻¹. This results in severe limitation in the charge transport properties of the polymer. We further observe the presence of bulk electronic defects in all different polymer batches that severely limit the current flow and manifest themselves in organic field effect transistors as apparent charge density dependence of the mobility. These defects are passivated by exposure to an ambient atmosphere, as confirmed by an increase in current and mobility that is no more charge density dependent. This is further confirmed by the result of chemical doping using 2,2-(perfluoronaphthalene-2,6-diylidene)dimalononitrile, F₆TCNNQ, which leads to the filling of the trap states and a higher charge density independent mobility of up to 1 cm2 V⁻¹ s⁻¹.
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Schmidt, Georg C., Daniel Höft, Katherina Haase, Arved C. Hübler, E. Karpov, R. Tkachov, M. Stamm, et al. "Naphtalenediimide-based donor–acceptor copolymer prepared by chain-growth catalyst-transfer polycondensation: evaluation of electron-transporting properties and application in printed polymer transistors." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-146244.

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The semiconducting properties of a bithiophene-naphthalene diimide copolymer (PNDIT2) prepared by Ni-catalyzed chain-growth polycondensation (P1) and commercially available N2200 synthesized by Pd-catalyzed step-growth polycondensation were compared. Both polymers show similar electron mobility of [similar]0.2 cm2 V−1 s−1, as measured in top-gate OFETs with Au source/drain electrodes. It is noteworthy that the new synthesis has several technological advantages compared to traditional Stille polycondensation, as it proceeds rapidly at room temperature and does not involve toxic tin-based monomers. Furthermore, a step forward to fully printed polymeric devices was achieved. To this end, transistors with PEDOT:PSS source/drain electrodes were fabricated on plastic foils by means of mass printing technologies in a roll-to-roll printing press. Surface treatment of the printed electrodes with PEIE, which reduces the work function of PEDOT:PSS, was essential to lower the threshold voltage and achieve high electron mobility. Fully polymeric P1 and N2200-based OFETs achieved average linear and saturation FET mobilities of >0.08 cm2 V−1 s−1. Hence, the performance of n-type, plastic OFET devices prepared in ambient laboratory conditions approaches those achieved by more sophisticated and expensive technologies, utilizing gold electrodes and time/energy consuming thermal annealing and lithographic steps
Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich
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Книги з теми "Copolymers Electric properties"

1

Ward, Jeremy Lewis. The synthesis and electrical properties of polar substituted styrene polymers and copolymers. Manchester: University of Manchester, 1996.

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Частини книг з теми "Copolymers Electric properties"

1

Leising, G., C. Heller, K. Pressl, W. Graupner, W. Fischer, F. Stelzer, Ch Godon, and S. Lefrant. "Optical Properties and Conjugation-Length-Effects of Polyacetylenes and Copolymers." In Electronic Properties of Polymers, 242–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84705-9_45.

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Mulazzi, E., A. Ripamonti, and S. Lefrant. "Interpretation of the Photoinduced Infrared Spectra of Oriented Polyacetylene and Triblock Copolymers." In Electronic Properties of Polymers, 54–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84705-9_10.

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Stelzer, F., W. Fischer, G. Leising, and Ch Heller. "Well Defined Polyacetylene-block-Poly(1,3-cyclopentylene Vinylene) Diblock Copolymers, Synthesis and Characterization." In Electronic Properties of Polymers, 231–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84705-9_43.

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Haynes, Dahlia, Mihaela C. Stefan, and Richard D. McCullough. "Conjugated-Insulating Block Copolymers: Synthesis, Morphology, and Electronic Properties." In Semiconducting Polymer Composites, 299–330. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527648689.ch11.

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Borkar, A. D. "Electrical transport properties of poly(aniline-con-phenylaniline) copolymers." In Novel Applications in Polymers and Waste Management, 29–39. Toronto ; New Jersey : Apple Academic Press, 2018.: Apple Academic Press, 2018. http://dx.doi.org/10.1201/9781315365848-2.

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Teixeira, S. Soreto, M. P. F. Graça, M. Dionisio, M. Ilcíkova, J. Mosnacek, Z. Spitalsky, I. Krupa, and L. C. Costa. "Electrical Properties of Lithium Ferrite Nanoparticles Dispersed in a Styrene-Isoprene-Styrene Copolymer Matrix." In Nanoscience Advances in CBRN Agents Detection, Information and Energy Security, 273–79. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9697-2_27.

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Choi, Chang Woo, Arun Anand Prabu, Sun Yoon, Yu Min Kim, and Kap Jin Kim. "Effect of Varying Memory Device Architectures on the Electrical Properties of P(VDF/TrFE)(72/28) Copolymer Thin Film." In Advances in Science and Technology, 491–96. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908158-11-7.491.

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Han, Chang Dae. "Rheology of Block Copolymers." In Rheology and Processing of Polymeric Materials: Volume 1: Polymer Rheology. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195187823.003.0014.

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Анотація:
Block copolymer consists of two or more long blocks with dissimilar chemical structures which are chemically connected. There are different architectures of block copolymers, namely, AB-type diblock, ABA-type triblock, ABC-type triblock, and AmBn radial or star-shaped block copolymers, as shown schematically in Figure 8.1. The majority of block copolymers has long been synthesized by sequential anionic polymerization, which gives rise to narrow molecular weight distribution, although other synthesis methods (e.g., cationic polymerization, atom transfer radical polymerization) have also been developed in the more recent past. Owing to immiscibility between the constituent blocks, block copolymers above a certain threshold molecular weight form microdomains (10–50 nm in size), the structure of which depends primarily on block composition (or block length ratio). The presence of microdomains confers unique mechanical properties to block copolymers. There are many papers that have dealt with the synthesis and physical/mechanical properties of block copolymers, too many to cite them all here. There are monographs describing the synthesis and physical properties of block copolymers (Aggarwal 1970; Burke and Weiss 1973; Hamley 1998; Holden et al. 1996; Hsieh and Quirk 1996; Noshay and McGrath 1977). Figure 8.2 shows schematically four types of equilibrium microdomain structures observed in block copolymers. Referring to Figure 8.2, it is well established (Helfand and Wasserman 1982; Leibler 1980) that in microphase-separated block copolymers, spherical microdomains are observed when the volume fraction f of one of the blocks is less than approximately 0.15, hexagonally packed cylindrical microdomains are observed when the value of f is between approximately 0.15 and 0.44, and lamellar microdomains are observed when the value of f is between approximately 0.44 and 0.50. Some investigators have observed ordered bicontinuous double-diamonds (OBDD) (Thomas et al. 1986; Hasegawa et al. 1987) or bicontinuous gyroids (Hajduk et al. 1994) at a very narrow range of f (say, between approximately 0.35 and 0.40) for certain block copolymers. Figure 8.2 shows only one half of the symmetricity about f = 0.5. Transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and small-angle neutron scattering (SANS) have long been used to investigate the types of microdomain structures in block copolymers.
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Mark, James E., Harry R. Allcock, and Robert West. "Polysilanes and Related Polymers." In Inorganic Polymers. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195131192.003.0009.

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In polysilane polymers, the polymer backbone is made up entirely of silicon atoms. Therefore these materials differ from other important inorganic polymers, the siloxanes and phosphazenes, in which the polymer chain is heteroatomic. Structurally, they are more closely related to homoatomic organic polymers such as the polyolefins. However, because the units in the main chain are all silicon atoms, the polysilanes exhibit quite unusual properties. The cumulated silicon-silicon bonds in the polymer chain allow extensive electron delocalization to take place, and this delocalization of the sigma electrons in the Si-Si bonds gives the polysilanes unique optical and electronic properties. Many of the potential technical uses, as well as the remarkable properties, of polysilanes result from this unusual mobility of the sigma electrons. The polysilanes can be regarded as one-dimensional analogs to elemental silicon, on which, of course, nearly all of modern electronics is based. The photophysical behavior of polysilanes is not approached by any other materials, save for the less stable and more costly polygermanes and polystannanes. The remarkable properties of polysilanes have led to intense interest, and to numerous proposed high-tech applications. But the great promise of polysilanes as materials has yet to be realized. Their only commercial use at present is as precursors to silicon carbide ceramics, an application which takes no advantage of their optical or electronic properties. Linear polysilane polymers, properly called poly(silylene)s, can be obtained as homopolymers or copolymers. Continuation of the polysilane chain consumes two of the four valences of each silicon atom; the other two are taken up by pendent groups, which may be the same or different. Copolymers, which contain two or more kinds of silicon atoms, can be made up from units. A typical example is the copolymer of Me2Si and PhMeSi units, poly(dimethylsilylene-co-phenylmethylsilylene), which bears the popular name “polysilastyrene.” The pendent groups are typically organic units and can include alkyl, aryl, substituted aryl, hydrogen, Me3Si, ferrocenyl, and so on. An unlimited number of different polymers are possible, and several hundred compositions have been described in the literature.
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Zaier, Rania, and Sahbi Ayachi. "Designing Well-Organized Donor-Bridge-Acceptor Conjugated Systems Based on Cyclopentadithiophene as Donors in Bulk Heterojunction Organic Solar Cells: DFT-Based Modeling and Calculations." In Solar Cells - Theory, Materials and Recent Advances. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94874.

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Two host materials based on CPDT as donors in bulk heterojunction organic solar cells were designed and investigated by means of DFT calculations. The first one (P-CPDTBT3) is a copolymer with D-A configuration and the second one (SM-CPDTDPP) is a D-π-A-π-D type small molecule. The investigated materials exhibited interesting structural properties with high planarity and rigidity originated from intra-molecular non-covalent interactions between the different building blocks. Thanks to their narrow band gaps, the optical absorption spectra have covered the main part of solar spectrum of interest. In addition, some general transport properties have been established. The transition density matrix (TDM) was used to get insight into the interaction of hole–electron localization and the electronic excitation processes. The photovoltaic parameters (FF, Voc) were calculated. The obtained results have been attempted to provide novel structure–property relationships for the rational design strategies of high-performance photovoltaic materials with power conversion efficiency of nearly 10%.
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Тези доповідей конференцій з теми "Copolymers Electric properties"

1

Krishnan, Arjun S., Ravi Shankar, Tushar K. Ghosh, and Richard J. Spontak. "Nanostructured Triblock Copolymer Network With Tailorable Electroactive Response." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-529.

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In recent years, the use of electroactive polymers (EAPs), which are polymeric materials that respond to an external electrical stimulus by changing shape or size, has been the focus of considerable research effort. While most studies have considered chemically cross-linked homopolymers, only a few reports have addressed the use of physically cross-linked triblock copolymer systems. We have previously demonstrated that triblock copolymer networks swollen by a midblock-selective, nonvolatile solvent constitute excellent candidates as dielectric elastomers, one class of EAP materials. Due to the presence of a molecularly self-organized nanostructure in such materials, this EAP genre is generally referred to as electro-active nanostructured polymers (ENPs). These systems not only exhibit high actuation strains (>200%), but are also amenable to facile processing and recycling. In this study, we examine the electromechanical response of symmetric triblock copolymers possessing styrenic endblocks and a rubbery midblock selectively solvated with an aliphatic mineral oil. Our findings show that the specimen thickness has a significant effect on the electroactive response of the system. Moreover, we are able to correlate the electromechanical properties of ENPs with their mechanical properties.
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2

Lukasiewicz, Marcin, and Magdalena Marciniak. "Synthesis and properties of cyclodextrin-malic acid copolymers." In The 15th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2011. http://dx.doi.org/10.3390/ecsoc-15-00579.

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3

Ramaratnam, Arun, and Nader Jalili. "Novel Carbon Nanotube Reinforced Electro-Active Polymer Sensors for Structural Vibration Control." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60794.

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Electro-active polymers like poly(vinylidene fluoride) — PVDF and their copolymers, have been emerging as a low cost substitutes for piezoelectric ceramics. Carbon nanotubes with their excellent physical and electronic properties can be used in these electro-active polymers to enhance their actuation and sensing properties. In the work presented here, actuators and sensors have been fabricated using piezoelectric polymers reinforced with carbon nanotubes. Single-walled and multi-walled nanotubes are used to reinforce the piezoelectric polymers. The response of these actuators and sensors are measured and the influence of the fabrication methods on the sensor performance is determined. The use of these materials as actuators and sensors to implement active vibration control is studied. These transducers also serve as additional damping materials added to the structure undergoing vibration due to their viscous damping properties. The change in properties of these piezoelectric polymers with different fabrication conditions and nanotube addition, though provokes doubts about standardization, invokes more research efforts on these new generation transducers.
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Likoglu, Gulbeden, H. Yuksel Guney, and Ufuk Abaci. "Non-reproducible Electrical Properties Of Semiconductor PVDF-HFP (Hexafluoropropylenevinylidenefluoride) Copolymer." In SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP, 2007. http://dx.doi.org/10.1063/1.2733524.

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5

Bonner, Carl E., Abram J. Ledbetter, Sam S. Sun, Cheng Zhang, Martin Drees, and Serdar Sariciftci. "Optical and electronic properties of polyphenylvinylene block copolymer films and devices." In Frontiers in Optics. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/fio.2005.jtuc76.

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6

Helal, Emna, Nicole R. Demarquette, Eric David, and Michel F. Frechette. "Polyethylene/styrenic block copolymer blends: Morphology and dielectric properties." In 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP 2014). IEEE, 2014. http://dx.doi.org/10.1109/ceidp.2014.6995902.

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Ko, W. C., J. L. Chen, W. J. Wu, Adam S. Y. Lee, and C. K. Lee. "Effects of polar molecules on the electret properties of cyclic olefin copolymers (COC)." In 2008 13th International Symposium on Electrets ISE 13. IEEE, 2008. http://dx.doi.org/10.1109/ise.2008.4813997.

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De Lima, Carlos A. S., Leice G. Amurin, Nicole R. Demarquette, and Eric David. "Morphological and electric properties of block copolymer/carbon nanotubes nanocomposites obtained by different methods." In 2016 IEEE Electrical Insulation Conference (EIC). IEEE, 2016. http://dx.doi.org/10.1109/eic.2016.7548671.

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Шакирзянов, R. Shakirzyanov, Астахов, V. Astakhov, Морченко, A. Morchenko, Кочервинский, V. Kochervinskiy, Бедин, and S. Bedin. "Electrophysicalpropertiesofpolyvinylidenefluoridecopolimers andassociated systems." In XXIV International Conference. Москва: Infra-m, 2016. http://dx.doi.org/10.12737/23195.

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Electro-physical properties of polyvinylidenefluoride copolymers (F-2M, F-42, SKF-32brands) were investigated. Such materials can be used as matrix media for producing the composites with multiferroicity properties and controlled dispersion. By using high-voltage polarization method it is shown that polymers F-2M, F-42 have expressed ferroelectric properties and Synthetic FPM SKF-32 is a highly polar dielectric. It is endorsed by studying structural properties with methods of differential scanning calorimetry and X-ray diffractometry, which show the presence of a large degree of crystallinity in the test based on samples F-2M and F-42.
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Men, R. J., Z. P. Lei, J. C. Song, and K. Y. Han. "Electrical Properties of Polypropylene Copolymer/Polyolefin Elastomer/SiO2 Nanocomposites." In 2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2022. http://dx.doi.org/10.1109/ichve53725.2022.9961501.

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