Relevant bibliographies by topics / Multi-functional Polymers

Academic literature on the topic 'Multi-functional Polymers'

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Published: 7 September 2023

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Journal articles on the topic "Multi-functional Polymers"

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Figovsky, Oleg. "New Methods of Preparing Multi-Functional Nanocomposite Coatings." Advanced Materials Research 79-82 (August 2009): 1979–82. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1979.

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Nanostructured coatings based on interpenetrated polymer network of polyurethanes, polyacrylates or epoxide resins and containing nanoparticles of SiO2, TiO2 and other metal oxides introduced into a polymeric matrix was elaborated. Technology of the unique coatings provides control of their micro-and nano-structures. Formulation of a new class of nanocomposite materials is characterized by the absence of contaminants in the polymers technology [1]. The main components of the technology are branched (dendro)-aminosilanes which serve as curing agents for many oligomers. Additional hydrolysis of aminosilane oligomers creates the secondary nano-structured network polymer that improves performance of the compound.
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Hanumantharao and Rao. "Multi-Functional Electrospun Nanofibers from Polymer Blends for Scaffold Tissue Engineering." Fibers 7, no. 7 (July 19, 2019): 66. http://dx.doi.org/10.3390/fib7070066.

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Electrospinning and polymer blending have been the focus of research and the industry for their versatility, scalability, and potential applications across many different fields. In tissue engineering, nanofiber scaffolds composed of natural fibers, synthetic fibers, or a mixture of both have been reported. This review reports recent advances in polymer blended scaffolds for tissue engineering and the fabrication of functional scaffolds by electrospinning. A brief theory of electrospinning and the general setup as well as modifications used are presented. Polymer blends, including blends with natural polymers, synthetic polymers, mixture of natural and synthetic polymers, and nanofiller systems, are discussed in detail and reviewed.
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Leng, Jin Song. "Multi-Functional Soft Smart Materials and their Applications." Advanced Materials Research 410 (November 2011): 25. http://dx.doi.org/10.4028/www.scientific.net/amr.410.25.

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Stimulus-active polymers can change their shapes with respect to configuration or dimension upon exposure to a particular stimulus such as heat, electricity, light, magnetic, solvent and pH value. These unique characteristics enable stimulus-active polymers to be used in a myriad of fields, including clothing manufacturing, automobile engineering, medical treatment, and aerospace engineering. Stimulus-active polymers can be applied in smart textiles and apparels, intelligent medical instruments and auxiliaries, artificial muscles, biomimetic devices, heat shrinkable materials for electronics packaging, micro-electro-mechanical systems, self-deployable sun sails in spacecrafts, miniature manipulator, actuators and sensors, and many more. This paper presents some recent progress of soft smart materials and their applications. Special emphasis is focused upon shape memory polymer (SMP), electro-active polymer (EAP) for aerospace engineering such as space deployable structures and morphing aircraft, which has highlighted the need for development of these materials. A detailed overview of development in these smart soft materials, of which the undergoing and future applications are used in adaptive structures and active control, is presented. The paper concludes with a short discussion for multi-functional soft smart materials and their composites that are expected to extend the range of development and applications available to the related researches and engineers.
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Nagarajan, M. K. "Multi-functional polyacrylate polymers in detergents." Journal of the American Oil Chemists’ Society 62, no. 5 (May 1985): 949–55. http://dx.doi.org/10.1007/bf02541766.

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Zafeiropoulou, Konstantina, Christina Kostagiannakopoulou, Anna Geitona, Xenia Tsilimigkra, George Sotiriadis, and Vassilis Kostopoulos. "On the Multi-Functional Behavior of Graphene-Based Nano-Reinforced Polymers." Materials 14, no. 19 (October 5, 2021): 5828. http://dx.doi.org/10.3390/ma14195828.

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The objective of the present study is the assessment of the impact performance and the concluded thermal conductivity of epoxy resin reinforced by layered Graphene Nano-Platelets (GNPs). The two types of used GNPs have different average thicknesses, <4 nm for Type 1 and 9–12 nm for Type 2. Graphene-based polymers containing different GNP loading contents (0.5, 1, 5, 10, 15 wt.%) were developed by using the three-roll mill technique. Thermo-mechanical (Tg), impact tests and thermal conductivity measurements were performed to evaluate the effect of GNPs content and type on the final properties of nano-reinforced polymers. According to the results, thinner GNPs were proven to be more promising in all studied properties when compared to thicker GNPs of the same weight content. More specifically, the glass transition temperature of nano-reinforced polymers remained almost unaffected by the GNPs inclusion. Regarding the impact tests, it was found that the impact resistance of the doped materials increased up to 50% when 0.5 wt.% Type 1 GNPs were incorporated within the polymer. Finally, the thermal conductivity of doped polymers with 15 wt.% GNPs showed a 130% enhancement over the reference material.
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Endo, Takeshi, and Toshikazu Takata. "Design and synthesis of multi-functional polymers." Kobunshi 37, no. 9 (1988): 662–65. http://dx.doi.org/10.1295/kobunshi.37.662.

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Pouyan, Paria, Mariam Cherri, and Rainer Haag. "Polyglycerols as Multi-Functional Platforms: Synthesis and Biomedical Applications." Polymers 14, no. 13 (June 30, 2022): 2684. http://dx.doi.org/10.3390/polym14132684.

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The remarkable and unique characteristics of polyglycerols (PG) have made them an attractive candidate for many applications in the biomedical and pharmaceutical fields. The presence of multiple hydroxy groups on the flexible polyether backbone not only enables the further modification of the PG structure but also makes the polymer highly water-soluble and results in excellent biocompatibility. In this review, the polymerization routes leading to PG with different architectures are discussed. Moreover, we discuss the role of these polymers in different biomedical applications such as drug delivery systems, protein conjugation, and surface modification.
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Sheikhi, Mohammad Rauf, and Selim Gürgen. "Intelligent Polymers for Multi-Functional Applications: Mechanical and Electrical Aspects." Polymers 15, no. 12 (June 8, 2023): 2620. http://dx.doi.org/10.3390/polym15122620.

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In this study, we fabricated an intelligent material, shear stiffening polymer (SSP), and reinforced it with carbon nanotube (CNT) fillers to obtain intelligent mechanical and electrical properties. The SSP was enhanced with multi-functional behavior, such as electrical conductivity and stiffening texture. Various amounts of CNT fillers were distributed in this intelligent polymer up to a loading rate of 3.5 wt%. The mechanical and electrical aspects of the materials were investigated. Regarding the mechanical properties, dynamic mechanical analysis was carried out, as well as conducting shape stability and free-fall tests. Viscoelastic behavior was investigated in the dynamic mechanical analysis, whereas cold-flowing and dynamic stiffening responses were studied in shape stability and free-fall tests, respectively. On the other hand, electrical resistance measurements were carried out to understand the conductive behavior of the polymers of the electrical properties. Based on these results, CNT fillers enhance the elastic nature of the SSP while initiating the stiffening behavior at lower frequencies. Moreover, CNT fillers provide higher shape stability, hindering the cold flow in the material. Lastly, SSP gained an electrically conductive nature from the CNT fillers.
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Wen, WANG, LIN Mei-juan, LING Qi-dan, and ZHANG Wen-gong. "Properties of Multi-functional Polymers Containing Terbium Complex." Acta Physico-Chimica Sinica 21, no. 08 (2005): 857–61. http://dx.doi.org/10.3866/pku.whxb20050807.

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Wang, Huei-Hsiung, and Mei-Show Lin. "Poly(urea-urethane) polymers with multi-functional properties." Journal of Polymer Research 7, no. 2 (June 2000): 81–90. http://dx.doi.org/10.1007/s10965-006-0107-y.

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Dissertations / Theses on the topic "Multi-functional Polymers"

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Michal, Brian. "Multi-Functional Stimuli-Responsive Polymers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459440396.

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Alexander, Shirin. "Multi functional polymers for drug delivery." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566691.

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Amphiphilic block and graft copolymers have been studied because of the possibility of tailoring their complex and fascinating chemical properties. Potential applications include wetting agents, foaming agents, plastic modifiers as well as biomedical applications in drug delivery, owing to their biocompatible and low toxic nature. This thesis describes the study of a series of amphiphilic block copolymers, known as Pluronics, and their aqueous interaction with a hydrophobic drug, flurbiprofen. Synthesis and characterisation of novel graft copolymers with interesting associative behaviour that is less influenced by concentration is also another major aspect of the work described in this thesis. Pulsed-field gradient stimulated-echo nuclear magnetic resonance (pFGSE- NMR) and surface tension measurements have been used to show that the addition of flurbiprofen promotes micellisation of Pluronic triblock copolymers (PI03, P123, and L43). Structural changes in the micelles ofPluronics PI03 and P123, as a function of temperature, eo-solvent (ethanol, 10 wt/vol %), and the addition of the hydrophobic drug flurbiprofen were also investigated by small- angle neutron scattering (SANS). Flurbiprofen was shown to be released from micelles by increasing the solution pH. At higher pH, the drug is ionised and the fraction of polymer in micelles reduces. Synthesis of novel graft copolymers was carried out using a "grafting onto" method. In this approach, the functional group of a hydrophobic backbone will react with the functional group of the copolymer chains. The graft copolymers composed of either hydrophilic Pluronics or sulfonated poly(ethylene oxide) chains and hydrophobic backbones, displayed formation of core-shell micelles in selective solvents. The Pluronic graft copolymers showed the potential for solubilising hydrophobic drug molecules in aqueous solution even at low polymer concentrations. These graft copolymers and their interactions with flurbiprofen were characterised by PFGSE-NMR and SANS.
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Nair, Kamlesh Prabhakaran. "Multi-functionalized side-chain supramolecular polymers a methodology towards tunable functional materials /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26505.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009.
Committee Chair: Weck, Marcus; Committee Member: Breedveld, Victor; Committee Member: Bunz, Uwe; Committee Member: Liotta, Charles; Committee Member: Marder, Seth; Committee Member: Srinivasarao, Mohan. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Chen, Hong. "Development of multi-functional polymeric biomaterials." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1490706379312092.

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Yu, Zitian. "The Preparation of Gold Nanoparticles for Multi-Functional Surface." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428063689.

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Yuan, Xuegang. "Cartilage Repair by Tissue Engineering: Multi-Functional Polymers as Scaffold Materials." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366820218.

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Liu, Qian. "Rational molecular design for multi-functional organic semiconducting materials." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208254/1/Qian_Liu_Thesis.pdf.

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This thesis demonstrates a comprehensive study of multifunctional applications of low-cost solution-processable organic semiconducting materials. It presents a series of rationally designed predominantly dye based innovative soft semiconductors with their generic optoelectronic properties. The performance of these materials’ application in various devices, including transistors, solar cells, memory devices and displays, are evaluated through world class collaboration to establish the structure-property relationship. In doing so, we not only developed several high-performance materials but also found that fused ring incorporation into the conjugated backbone is an effective strategy to construct multifunctional semiconductors towards flexible and printed electronics.
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Park, Soo Jeoung. "Photopolymerization-Induced Crystallization in Relation to Solid-Liquid Phase Diagrams of Blends of Blends of Poly(ethylene oxide)/Multi-functional Acrylate Monomers." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1218131827.

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Zhang, Jiawei. "Multi-functional nanocomposites for the mechanical actuation and magnetoelectric conversion." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00765011.

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Magnetoelectric (ME) interactions in matter correspond to the appearance of magnetization by means of an electric field (direct effect) or the appearance of electric polarization by means of a magnetic field (converse effect). The composite laminates which possess large ME coefficient, have attracted much attention in the field of sensors, modulators, switches and phase inverters. In this thesis, we report on the ME performances of the bi- and tri- layered composites. It is shown that their ME couplings can be achieved by combining magnetostrictive and piezoelectric layers. A model based on a driven damped oscillation is established for the piezoelectric/magnetostrictive laminated composite. It is used to simulate the mechanical coupling between the two layers. In addition, we report that the ME coupling can be achieved without magnetic phase but only with eddy current induced Lorentz forces in the metal electrodes of a piezoelectric material induced by ac magnetic field. The models based on the Lorentz effect inducing ME coupling in PZT unimorph bender, polyvinylidene fluoride (PVDF) film and PZT ceramic disc are thus established. The results show the good sensitivity and linear ME response versus dc magnetic field change. Thus, the room temperature magnetic field detection is achievable using the product property between magnetic forces and piezoelectricity. Besides, we report on the electrostrictive performance of cellular polypropylene electret after high-voltage corona poling. We use the Surface Potential test, Thermal Stimulated Depolarization Current experiment and Differential Scanning Calorimetry experiment to analyse its charge storage mechanism. The result show that the electrostrictive coefficient and relative permittivity of the charged samples increase. Last but not least, in order to explain this phenomenon, a mathematic model based on the charged sample has been established.
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Santese, Francesca. "Molecular modeling of multi-functional nanostructured materials and coatings." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9974.

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2012/2013
Materiali e rivestimenti nanostrutturati possono potenzialmente apportare significativi cambiante nel campo della nanoscienze, nonché offrire una nuova generazione di materiali con caratteristiche e performance migliori. A questo proposito le tecniche computazionali diventano uno strumento fondamentale, in grado di ridurre notevolmente i tempi che vanno dall’idea iniziale al prodotto finito. La simulazione molecolare permette infatti la previsione delle proprietà macroscopiche prima che i materiali vengano preparati e caratterizzati sperimentalmente; consente inoltre una migliore comprensione dei fenomeni fisici su scala nanometrica. In questo lavoro di tesi sono presentati alcuni casi studio in cui vengono proposte diverse procedure computazionali per affrontare importanti aspetti come la bagnabilità della superficie, l’effetto della dimensione e della forma delle nanoparticelle e i loro meccanismi di aggregazione/dispersione. In questo contesto, si è dimostrata la vasta applicabilità della modellazione molecolare evidenziando quindi come questa rappresenti un potente strumento per comprendere e controllare le proprietà finali di materiali nanostrutturati, aprendo così la strada ad una progettazione in silico di nuovi materiali.
Nanostructured materials and coatings have the potential to change materials science significantly, as well as to provide a new generation of materials with a quantum improvement in properties. In this regard computational materials science becomes a powerful tool. It is able to rapidly reduce the time from concept to end product. Molecular simulation enables the prediction of properties of these new materials before preparation, processing, and experimental characterization, as well as a better understanding of the physical phenomena at the nanoscale level. In this thesis we present several study cases in which we propose different computational recipes to deal with different important topics such as surface wettability, effect of nanoparticles size and shape and nanoparticles aggregation/dispersion. In this context, we demonstrate the broad applicability of the molecular modelling and we ascertain that molecular simulation represent a powerful tool to understand and control the nanomaterials properties thus opening avenues for the in silico design of new materials.
XXVI Ciclo
1985
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Books on the topic "Multi-functional Polymers"

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Shahinpoor, Mohsen. Ionic Polymer Metal Composites Set: Smart Multi-Functional Materials and Artificial Muscles, Complete Set. Royal Society of Chemistry, The, 2015.

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Shahinpoor, Mohsen. Ionic Polymer Metal Composites: Smart Multi-Functional Materials and Artificial Muscles, Volume 1. Royal Society of Chemistry, The, 2015.

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Shahinpoor, Mohsen. Ionic Polymer Metal Composites Vol. 2: Smart Multi-Functional Materials and Artificial Muscles, Volume 2. Royal Society of Chemistry, The, 2015.

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Book chapters on the topic "Multi-functional Polymers"

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Argenal, Andres, David Matthews, Connor Murrell, Andrew H. Cannon, Mark Pankow, and Garrett J. Pataky. "Carbon Fiber Reinforced Polymers with Carbon Nanotubes: Investigation of Interlaminar Strength." In Mechanics of Composite, Hybrid & Multi-functional Materials, Volume 5, 1–6. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17445-2_1.

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Merzkirch, Matthias, and Tim Foecke. "10° Off-Axis Tensile Testing of Carbon Fiber Reinforced Polymers Using Digital Image Correlation." In Mechanics of Composite and Multi-functional Materials, Volume 5, 55–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30028-9_8.

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Hosur, Mahesh V., Merlin Theodore, and Shaik Jeelani. "Effects of Functionalization on the Morphology, Cure Kinetics and Mechanical Behavior of Thermosetting Polymers." In IUTAM Symposium on Multi-Functional Material Structures and Systems, 143–52. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3771-8_15.

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Sadasivuni, Kishor Kumar, Abdullahil Kafy, Lingdong Zhai, Hyun-U. Ko, Seong Cheol Mun, and Jaehwan Kim. "Multi Functional and Smart Graphene Filled Polymers as Piezoelectrics and Actuators." In Graphene-Based Polymer Nanocomposites in Electronics, 67–90. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13875-6_4.

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Zarras, P., A. Guenthner, D. J. Irvin, J. D. Stenger-Smith, S. Hawkins, L. Baldwin, R. Quintana, et al. "Multi-Functional Electroactive Polymers (EAPs) as Alternatives for Cadmium Based Coatings." In ACS Symposium Series, 133–49. Washington, DC: American Chemical Society, 2010. http://dx.doi.org/10.1021/bk-2010-1050.ch010.

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Bhattacharyya, D., and R. J. Shields. "Modeling of Fibre Formation and Oxygen Permeability in Micro-fibrillar Polymer-Polymer Composites." In IUTAM Symposium on Multi-Functional Material Structures and Systems, 111–19. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3771-8_12.

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Deshmukh, Sujay, and Zoubeida Ounaies. "Active Single Walled Carbon Nanotube–Polymer Composites." In IUTAM Symposium on Multi-Functional Material Structures and Systems, 103–10. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3771-8_11.

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Hu, Ning, Yoshifumi Karube, and Hisao Fukunaga. "A Strain Sensor from a Polymer/Carbon Nanotube Nanocomposite." In IUTAM Symposium on Multi-Functional Material Structures and Systems, 77–86. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3771-8_8.

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Waldman, Laura J., Peter J. Hawrylak, and Michael W. Keller. "Electromagnetic and Mechanical Behavior of Conductive Polymer Materials for Antennas." In Mechanics of Composite and Multi-functional Materials, Volume 5, 69–72. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30028-9_10.

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Moses, Daniel, Siamack Shirazi, and Michael W. Keller. "Reversal of Scratches in Polymer Seals via Laminated Vascular Networks." In Mechanics of Composite and Multi-functional Materials, Volume 5, 81–84. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30028-9_12.

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Conference papers on the topic "Multi-functional Polymers"

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Lee, Jae Gyeong, Sukyoung Won, Jeong Eun Park, and Jeong Jae Wie. "Multi-Functional 3D Curvilinear Self-Folding of Glassy Polymers." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8407.

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Abstract The selective light absorption of pre-stretched thermoplastic polymeric films enables wireless photothermal shape morphing from two-dimensional Euclidean geometry of films to three-dimensional (3D) curvilinear architectures. For a facile origami-inspired programming of 3D folding, black inks are printed on glassy polymers that are used as hinges to generate light-absorption patterns. However, the deformation of unpatterned areas and/or stress convolution of patterned areas hinder the creation of accurate curvilinear structures. In addition, black inks remain in the film, prohibiting the construction of transparent 3D architectures. In this study, we demonstrate the facile preparation of transparent 3D curvilinear structures with the selection of the curvature sign and chirality via the selective light absorption of detachable tapes. The sequential removal of adhesive patterns allowed sequential folding and the control of strain responsivity in a single transparent architecture. The introduction of multiple heterogeneous non-responsive materials increased the complexity of strain engineering and functionality. External stimuli responsive kirigami-based bridge triggered the multi-material frame to build the Gaussian curvature. Conductive material casted on the film in a pattern retained the conductivity, despite local deformation. This type of tape patterning system, adopting various materials, can achieve multifunction including transparency and conductivity.
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MenaBrito, Rodrigo. "Multi-Functional Bio-Based Polymers in Laundry Detergents Prevent Staining and Graying." In Virtual 2020 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2020. http://dx.doi.org/10.21748/am20.121.

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Wang, Shu. "Design of Multi-Functional Conjugated Polymers for Sensing, Imaging and Biomedical Applications." In Nanophotonics, Nanoelectronics and Nanosensor. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/n3.2013.nsa4c.1.

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Kelland, Malcolm A., and Janronel Pomicpic. "Multi-Functional Flow Assurance Inhibitors : Three Birds With One Stone?" In SPE International Conference on Oilfield Chemistry. SPE, 2023. http://dx.doi.org/10.2118/213817-ms.

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Abstract Due to the presence of produced water, several fouling problems such as gas hydrates and scale, as well as corrosion can occur in unprocessed subsea production flow lines. Several treatment chemicals often need to be injected simultaneously at the well head into these flow lines. Among them are hydrate, scale, and corrosion inhibitors. However, some combinations of these chemicals can be antagonistic. We have investigated the possibility to combine all three properties into one molecule. We used kinetic hydrate inhibitor (KHI) polymers as the developmental starting point for use in cold flow lines with low to medium gas hydrate subcooling potential. We focussed on maleic-based polymers as they offer a low cost - high performance solution with great flexibility to also incorporate functionality for scale and corrosion inhibition. A set of low molecular weight maleic homo- and copolymers were synthesized and synergists added to improve the CO2 corrosion inhibition performance. The KHI performance was determined in high pressure steel rocking cells, scale calcite inhibition in static jar and dynamic tube blocking test equipment and sweet corrosion inhibition in a CO2 bubble test cell. The difficulties of achieving the "triple", three different inhibitors in one molecule, will be highlighted.
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Bejgerowski, Wojciech, Satyandra K. Gupta, and Hugh A. Bruck. "A Modeling Approach for Simulating Heat Dissipation From Actuators and Electronic Components Embedded in Thermally Conducting Polymers." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87300.

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Thermally conductive polymer composites allow for creating multi-functional structures that offer both anchoring points for the embedded actuators as well as heat dissipation functions. This paper focuses on understanding the heat dissipation function through a coupled modeling of polymer melt flow to obtain fiber orientations along with orthotropic thermal conductivities is presented to simulate the dissipation of heat generated by an electrical component embedded in both unfilled and filled polymer structures. The performed simulations indicate that the gain in heat dissipation when using commercially available thermally conductive polymers results in 40% reduction in the operating temperature of the embedded electronic component. In the case of an embedded actuator, such as a pager motor, this is expected to significantly enhance performance. The orthotropic thermal conductivity resulting from fiber orientation was found to not significantly influence the heat dissipation function of the structural geometries that were studied in this paper. Therefore, in such cases the computational effort involved in modeling process-dependant orthotropic thermal conductivities can be omitted during the design of filled polymer structures with embedded actuators. Validation of the model was obtained through comparison of simulation predictions with experimental results for a simple embedded ceramic resistor and a more complex embedded motor in a model structure. We also found that increasing the thermal conductivity beyond the value of 2 W/m-K had very little impact on the heat dissipation function. This work establishes the feasibility of creating multi-functional structures from filled polymers by embedding actuators to facilitate the miniaturization of devices.
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Kawabe, Masanao, Hiroko Kitajima, Hiroyuki Yano, Takahiro Imamura, Masahiro Shimoda, Yasuji Shichijo, and Isamu Akiba. "Syntheses of multi-functional aromatic copolymers (PDVs) with controlled molecular architectures and development of novel low dielectric loss materials from PDVs." In 6th International Conference on Polymers and Adhesives in Microelectronics and Photonics. Polytronic 2007. IEEE, 2007. http://dx.doi.org/10.1109/polytr.2007.4339138.

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McCutcheon, Jeff W. "Ultra-Pure Viscoelastic Damping Polymers and Associated Low Outgassing Materials." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1636.

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Abstract The key to successful multifunctional materials applications for vibration, shock and acoustic control is often the proper selection of materials, geometric design and optimum application. Much work has been done in the areas of geometric designs and optimum application of the multi-functional materials. The next step is improvements in the passive damping materials themselves. The improvement in the passive materials in the past has often focused on the areas of improved damping performance (loss factor, storage modulus), material performance (acrylics, silicones, etc.) and enhanced features (thermally conductive, electrically conductive, etc). One of the newest requirements for passive damping polymers is in the area of ultra-pure viscoelastic damping polymers. This new generation of materials is finding growing use because the sensitive environment where the passive material is used require a material that will not negatively impact the components in that environment. This new generation of passive materials needs to be ultra-pure with respect to organic material outgassing, anions, catalysts and siloxanes. In addition to the viscoelastic damping polymer requirements for high purity, the associated polymeric materials (epoxies, laminating adhesives and tapes) used in the same environment must also be of a similar low outgassing, ultra-pure, ultra-clean, electronics grade or clean room performance designation. If this is not done, the environment could become contaminated and negate a portion of the benefit of using the clean damping material. This also requires an understanding of the test method used to determine each product’s cleanliness performance, as all test methods are not equal and can give significantly different test results. An example is comparing a polymer sample tested for organic outgassing and using a static headspace gas chromatography/mass spectroscopy (GC/MS) and a dynamic headspace GC/MS.
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Kalia, Karun, and Amir Ameli. "Interfacial Bond Strength of Various Rigid/Soft Multi-Materials Printed via Fused Filament Fabrication Process." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2298.

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Abstract Layered multi-materials of dissimilar polymers and their nanocomposites offer new opportunities as smart materials and structures. A critical aspect of such structures is the quality of interlayer adhesion between dissimilar polymer matrices. This work reports the development of asymmetric double cantilever beam (ADCB) specimens of dissimilar polymers and its use in the analysis and understanding of their interlayer adhesion in 3D-printed rigid/soft interfaces. Acrylonitrile butadiene styrene (ABS), polycarbonate (PC), polylactic acid (PLA) were chosen as the rigid polymers and combined with thermoplastic polyurethane (TPU) as the soft component. 3D-printed ADCB specimens were loaded under opening mode, until fracture, to obtain the load-displacement data and the fracture surfaces were analyzed using optical microscopy. ABS/TPU/ABS and PC/TPU/PC material combinations resulted in a more stable crack growth with a high peak load indicating a relatively good interfacial adhesion. The high nozzle temperatures of ABS and PC and their amorphous nature contributed to a good layer-to-layer fusion during 3D printing. However, PLA/TPU/PLA specimens exhibited an unstable crack growth behavior with a pure adhesive failure mode and a significantly lower peak load. This poor interfacial bond strength was correlated to the relatively low nozzle temperature of PLA and its semi-crystalline structure. The maximum loads in ABS/TPU/ABS and PC/TPU/PC specimens were found to be ∼2.5 times greater than that of PLA/TPU/PLA ones. The method provides a valuable tool in quantifying interlayer adhesion quality in printed dissimilar polymers and their functional nanocomposites.
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Giaquinto, M., F. Gambino, P. Cicatiello, A. Micco, A. Aliberti, A. M. Cusano, A. Ricciardi, and A. Cusano. "Multiresponsive smart cavity based lab-on-fiber optrode." In Optical Fiber Sensors. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/ofs.2022.th1.2.

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A microgel based optical cavity, properly functionalized to swell/collapse when exposed to biomolecules, charged polymers, and pH variations, is integrated onto an optical fiber tip, to realize a multi-functional lab-on fiber optrode for biochemical sensing.
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Okolo, Chinyere, Ahmed Elmarakbi, and Martin Birkett. "Investigating the Thermal and Mechanical Properties of Polyurethane Urea Nanocomposites for Subsea Applications." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-95623.

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Abstract Commercial applications of polymer nanocomposites for materials used in offshore settings is continuously touted as a potential solution to expand the material property envelope of polymers used in high pressure and temperature environments. In this regard, polyurethane urea (PUU) has been successfully used in such environments, however, they are limited in terms of their ability to offer multifunctional behavior i.e., thermal conductive behavior with mechanical properties. This gap offers the opportunity for their properties to be enhanced as an advanced multi-functional polymer. Hence, in this study, polyurethane urea/graphene nanocomposites were synthesized using commercial Polyurethane urea (Task 12), and graphene nanoplatelets (GnP). The graphene nanoplatelets were dispersed in one part of the polyurethane urea component using facile dispersion methods. The properties of the new PUU nanocomposite materials were studied using SEM, mechanical and thermal analysis techniques (DMA and Hot Disk), to examine the development of the multifunctional properties in the PUU nanocomposite. Our analysis describes the influence of graphene nanoplatelets at ultra-low concentrations on multi-functional properties of the PUU nanocomposites. The developed nanocomposites recorded a 16% increase in the tensile strength and an 8% increase in the thermal conductive values. The property improvements are credited generally to the high aspect ratio of graphene nanoplatelets, dispersion and filler-polyurethane interactions at the interface. The impartation of multi-functional behavior, in enhancing the thermal conductivity whilst maintaining the mechanical properties makes it a potentially valuable for subsea applications.
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Reports on the topic "Multi-functional Polymers"

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Perahia, Dvora, and Gary S. Grest. From Interfaces to Bulk: Experimental-Computational Studies Across Time and Length Scales of Multi-Functional Ionic Polymers. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1340575.

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Adam J. Moule. Final Closeout report for grant FG36-08GO18018, titled: Functional Multi-Layer Solution Processable Polymer Solar Cells. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1047857.

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