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Relevant bibliographies by topics / Composite polymer particles

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Academic literature on the topic 'Composite polymer particles'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Composite polymer particles"

1

Shabaniverki, Soheila, and Jaime J. Juárez. "Directed Assembly of Particles for Additive Manufacturing of Particle-Polymer Composites." Micromachines 12, no. 8 (August 7, 2021): 935. http://dx.doi.org/10.3390/mi12080935.

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Particle-polymer dispersions are ubiquitous in additive manufacturing (AM), where they are used as inks to create composite materials with applications to wearable sensors, energy storage materials, and actuation elements. It has been observed that directional alignment of the particle phase in the polymer dispersion can imbue the resulting composite material with enhanced mechanical, electrical, thermal or optical properties. Thus, external field-driven particle alignment during the AM process is one approach to tailoring the properties of composites for end-use applications. This review article provides an overview of externally directed field mechanisms (e.g., electric, magnetic, and acoustic) that are used for particle alignment. Illustrative examples from the AM literature show how these mechanisms are used to create structured composites with unique properties that can only be achieved through alignment. This article closes with a discussion of how particle distribution (i.e., microstructure) affects mechanical properties. A fundamental description of particle phase transport in polymers could lead to the development of AM process control for particle-polymer composite fabrication. This would ultimately create opportunities to explore the fundamental impact that alignment has on particle-polymer composite properties, which opens up the possibility of tailoring these materials for specific applications.

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Dang, Zhi-Min, Jin-Kai Yuan, Jun-Wei Zha, Peng-Hao Hu, Dong-Rui Wang, and Zhong-Yang Cheng. "High-permittivity polymer nanocomposites: Influence of interface on dielectric properties." Journal of Advanced Dielectrics 03, no. 03 (July 2013): 1330004. http://dx.doi.org/10.1142/s2010135x13300041.

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Flexible dielectric composites with high permittivity have been extensively studied due to their potential applications in high-density energy capacitors. In this review, effects of interface characteristics on the dielectric properties in the polymer-based nanocomposites with high permittivity are analyzed. The polymer-based dielectric composites are classified into two types: dielectric–dielectric (DD, ceramic particle-polymer) composites and conductor–dielectric (CD, conductive particle-polymer) composites. It is highly desirable for the dielectric–dielectric composites to exhibit high permittivity at low content of ceramic particles, which requires a remarkable interface interaction existing in the composite. For conductor–dielectric composites, a high permittivity can be achieved in composite with a small amount of conductor particle, but associated with a high loss. In this case, the interface between conductor and polymer with a good insulating characteristic is very important. Different methods can be used to modify the surface of ceramic/conductor particles before these particles are dispersed into polymers. The experimental results are summarized on how to design and make the desirable interface, and recent achievements in the development of these nanocomposites are presented. The challenges facing the fundamental understanding on the role of interface in high-permittivity polymer nanocomposites should be paid a more attention.

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Hao, Xiang Yang, Xiao Ying Hua, Guo Sheng Gai, and Jian Lu. "Preparing ACB/UHMWPE Composite by PCS Process and its Electric Resistance-Temperature Behavior." Advanced Materials Research 826 (November 2013): 223–27. http://dx.doi.org/10.4028/www.scientific.net/amr.826.223.

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Composite particles with ultra-high molecular polyethylene (UHMWPE) matrix core and acetylene black (ACB) shell were produced by particle composite system (PCS), and molded into conductive polymer composites. Morphology of these composite particles was investigated by SEM. Matrix particles were coated by ACB nanoparticles very well. Conductive networks of ACB in polymer composites were seen by SEM. The results of electrical behavior study show that the polymer composites exhibit low percolation threshold and its electric conductivity is less affected by temperature due to unusual ACB distribution. Related mechanism is discussed.

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Sabarinathan, P., K. Rajkumar, and A. Gnanavelbabu. "Mechanical Properties of Almond Shell-Sugarcane Leaves Hybrid Epoxy Polymer Composite." Applied Mechanics and Materials 852 (September 2016): 43–48. http://dx.doi.org/10.4028/www.scientific.net/amm.852.43.

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In this work agricultural wastages such as sugarcane leaves and almond shell particles were reused as reinforcement in polymer material. This paper revealed the effect of sugarcane leaves, and almond shell particle on mechanical property of polymer composites. Sugarcane leaves were chopped to size of 50mm*50mm and almond shell of average 1mm particle size were used to fabricate epoxy polymer composite by hand layup technique. Tensile, flexural and impact test were carried out to evaluate the mechanical property of the composite. Scanning electron microscopy study shows that uniform particle distribution and good bonding between particles and epoxy polymer.

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Shakuntala, Ojha, Gujjala Raghavendra, and Acharya Samir Kumar. "Effect of Filler Loading on Mechanical and Tribological Properties of Wood Apple Shell Reinforced Epoxy Composite." Advances in Materials Science and Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/538651.

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During the last century, natural fibers and particulates are used as reinforcement in polymer composite that has been continuously growing in the composite industry. This polymer matrix composite has wide range of applications in hostile environment where they are exposed to external attacks such as solid particle erosion. Also, the mechanical properties of different polymer composites show the best alternate to replace the metal material. In the present investigation, an attempt has been made to improve the mechanical and tribological behaviour of polymer matrix composite using wood apple shell particles as a filler material in polymer matrix. Also the temperature variation of the dynamic-mechanical parameters of epoxy matrix composites incorporated with 5, 10, 15, and 20 wt% of wood apple shell particles was investigated by DMA test. It is clearly observed that the incorporation of wood apple shell particles tends to increase the tensile strength, flexural strength, erosive wear resistance, and viscoelastic stiffness of the polymer composite. To validate the results, SEM of the polymer matrix composite has been studied.

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Hsieh, Tsung-Han, Ming-Yuan Shen, Yau-Shian Huang, Qi-Qian He, and Hsuan-Chih Chen. "Mechanical Properties of Glass Bead-Modified Polymer Composite." Polymers and Polymer Composites 26, no. 1 (January 2018): 35–44. http://dx.doi.org/10.1177/096739111802600105.

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This present work investigated the adhesive effect of the material properties and fracture toughness of a thermosetting epoxy polymer modified with micron-sized glass beads. Various surface treatments were used to modify the surfaces of the glass beads in order to consider the effect of the glass bead particle/epoxy adhesion on the material properties and toughness of the polymer-based composites. Adding glass beads into polymer resulted in an increase in the modulus. The maximum value of the modulus was obtained for the polymer composite modified with well-bonded glass beads. The addition of the glass beads to polymers leads to a significant improvement in the fracture toughness. The particle/matrix adhesion strongly affects the toughness of the glass bead-modified polymers. The coupling agent silane treatment and release agent Frekote treatment caused well-bonded particles and poorly-bonded particles with the epoxy matrix. Both of the surface treatments result in a significant increase in the toughening performance. Toughening mechanisms of plastic void growth and crack deflection caused by the addition of the glass beads were found on the fracture surfaces of the tested specimens.

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Hao, Xiang Yang, Guo Sheng Gai, Yu Fen Yang, Yi He Zhang, and Ce Wen Nan. "Preparation of Conductive Composite Particles by Impact Coating Process." Key Engineering Materials 336-338 (April 2007): 2044–46. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.2044.

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PCS (particle composite system) is a kind of dry coating equipment. The PCS process involves encapsulating UHMWPE (ultra-high molecular polyethylene) particles with a layer of SCB (super conductive carbon black) or ACB (acetylene black), and subsequently compacting these CB-encapsulated UHMWPE powders by compression molding to manufacture conductive polymer composites respectively. Morphologies of these composite particles were investigated by SEM. By SEM, we can see the conductive networks of CB in polymer composites. Coating-molding process with PCS can be used to form network structure in ceramics and metal as well.

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Leary, B., and CJ Lyons. "A Novel Composite Polymer Latex Technology." Australian Journal of Chemistry 42, no. 12 (1989): 2055. http://dx.doi.org/10.1071/ch9892055.

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The physical chemistry involved in the invention and development of a novel aqueous composite polymer latex technology at Dulux Australia is described. The polymerization process employed leads to a latex wherein each particle contains a blend of two or more copolymers. These particles are sterically stabilized by a new class of non-ionic reactive surfactant which results in excellent colloidal stability. A paint based on this technology has been commercialized in the coil coating industry. The particle size distribution of the latex used in this paint is studied before, during and after polymerization. The evidence obtained confirms that the desired composite polymer particles are formed by a suspension polymerization mechanism and that little or no polymer separation due to secondary nucleation (nucleation of polymer particles from the aqueous phase) takes place.

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Majer, Zdeněk, Luboš Náhlík, and Lucie Malíková. "Particulate Composite Damage: The Influence of Particle Shape on Crack Path." Key Engineering Materials 662 (September 2015): 77–80. http://dx.doi.org/10.4028/www.scientific.net/kem.662.77.

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Using stiff particles mixed into polymer matrix may significantly improve global mechanical response of the composite. Unfortunately, this process leads to other side effects, for example, presence of stress concentration at the particle-matrix interface or negative influence on the fracture toughness. The paper presents an approach to estimate the influence of particles on the micro-crack propagation. Material properties of matrix and particles were estimated experimentally. A two-dimensional computational model was proposed and all calculations were done in software ANSYS. On the base of linear elastic fracture mechanics, the influence of the particle shape on the micro-crack propagation paths was analyzed via numerical studies. The results of numerical simulations show that the shape of the particles can significantly influence the micro-crack path as well as the stress intensity factor on the crack tip, which corresponds to fracture toughness of polymer composite filled with rigid particles. The conclusions of this paper could contribute to better understanding of the behavior of the polymer composites.

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Gopi, K. R., and R. Nagarajan. "Application of Power Ultrasound in Cavitation Erosion Testing of Nano-Ceramic Particle/Polymer Composites." Solid State Phenomena 136 (February 2008): 191–204. http://dx.doi.org/10.4028/www.scientific.net/ssp.136.191.

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Cavitation erosion is predominant in pipelines for liquid transportation, causing damage to pipe wall, impeller and their accessories. The present study is focused on development of cavitation -wear resistant nano-ceramic particle-reinforced polymer matrix material; and on study of its feasibility to be used as lining material in hydraulic transportation. The polymer/nano composite is fabricated using power ultrasound in all three process steps: synthesis of nano-dimensional particles of white fused alumina (WFA) from micron size particles, optimized blending and finally reinforcement into poly methyl methacrylate (PMMA) matrix. The effect of ultrasonic parameters on nanocomposite/ virgin polymers (like polyethylene and polypropylene) is studied by measuring mass loss of the materials and suspension turbidity during exposure time. At low frequency (20-60 kHz), cavitation intensity is predominant; this effect is utilized for fabricating sub-micron particles, and for performing accelerated cavitation erosion tests. At high frequency, acoustic streaming is predominant; this effect is utilized for blending and reinforcing of the nano ceramic particles into polymer matrix. The size and quantity of the particles generated by cavitation erosion was analyzed by Laser Particle Size Analyzer (20 nm-1400 micron range). The nano-composite coupons were analyzed before and after the ultrasonic erosion test using SEM. It is concluded that lowfrequency sonication is a viable option for cavitaton erosion testing of ceramic/polymer composites.

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Dissertations / Theses on the topic "Composite polymer particles"

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Winchester, Stuart. "Composite modification by preformed polymer particles." Thesis, University of Surrey, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267411.

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Lu, Yan. "Polypyrrole-containing Composite Particles: Preparation, Characterization and Application." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1109235925474-80822.

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This research is focused on preparation of polypyrrole (PPy) composite particles by using socalled template oxidative polymerization method. As a template, water-soluble polymers, polymeric microgels, latex particles or bulk gels can be used. The morphology and properties of the composite particles can be controlled effectively by the proper use of the template. By choosing the dopant anion or oxidation agent it is possible to vary the conductivity of the polymer. In the case when uncrosslinked PVME was used as stabilizer, core-type polypyrrole spherical particles in the range of 50-100 nm were formed in both aqueous ethanol and water. Results of the elementary analysis, IR spectroscopy confirmed that the anionic salts can be incorporated in the PPy particles and play as the dopants. The presence of dopants in polypyrrole enhances the conductivity, especially in the case of sodium benzoate the conductivity of the final product has been improved by 3 orders. Polymeric microgels were also applied as the templates for polypyrrole deposition. When crosslinked PVME microgels were used in the oxidation polymerization of pyrrole, large PPy fibrils (appr. 400nm) were formed. Needle-like particles were formed due to the porous structure of microgels, which play a template role in the pyrrole polymerization process. When poly(VCL/AAEM) microgels were used as a template for oxidative polymerization of pyrrole, "raspberry-like" composite particles will be formed with PPy domains located in swollen hydropholic particle shell. Obtained stable composite microgels show similar thermal sensitivity as poly(VCL/AAEM) particles with fully reversible collapse-swelling properties. Increase of PPy content in composite particles increases conductivity of the composite material. The conductivity of composite particles prepared in water was much higher than that of prepared in water : ethanol mixtures. Furthermore, monodisperse PS-PEGMA particles, which were prepared in water medium by polymerization with sodium peroxydisulfate have been used as a template for deposition of polypyrrole (PPy). Obtained composite particles possess core-shell morphology where shell is composed out of small PPy nano-domains. The shell thickness can be varied by changing PPy load, controlling the overall template surface area in the system, and by influencing the pyrrole polymerization kinetics in presence of different oxidants. The last possibility provides also incorporation of different anions into polypyrrole shell. The stability of composite particles decreases gradually if the deposited PPy amount increases. It has been established that obtained particles are intrinsically coloured and the colour can be changed by the PS-PEGMA core size. Conductivity measurement shows that PS/PEGMA/PPy composite particles prepared by using phosphomolybdate as the oxidant are much more conductive than the particles prepared by the other two oxidants. The conductivity increases with the increase of PPy load in the system. Overall, the proper design of the template should give a possibility to control effectively the morphology, particle size and provide sufficient stability to the composite particles. Different morphologies, such as spherical, core-shell, raspberry and needle-like, with different particle size are expected to be available in different cases. By choosing the dopant anion or oxidation agent it is possible to vary the conductivity of the polymer. The stable water-based dispersions are expected to be used as additives for paint formulations, in electrorheology, microelectronic, ion-separation or disease diagnostics.

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Wang, Nan. "Preparation and morphological study of composite nano-particles made of homopolymers." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1374.

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Lu, Yan. "Polypyrrole containing composite particles: preparation, characterization and application." Doctoral thesis, [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974241083.

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Imberg, Anna. "On Phase Behaviours in Lipid/Polymer/Solvent/Water Systems and their Application for Formation of Lipid/Polymer Composite Particles." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributöt], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3795.

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Otto, Christian [Verfasser], and Volker [Akademischer Betreuer] Abetz. "Electrically Conductive Composite Materials from Carbon Nanotube Decorated Polymer Powder Particles / Christian Otto ; Betreuer: Volker Abetz." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1150183748/34.

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Stevanovic, Dejan, and dejan@mso anu edu au. "Delamination Properties of a Vinyl-Ester/Glass Fibre Composite Toughened by Particulate-Modified Interlayers." The Australian National University. Faculty of Engineering and Information Technology, 2002. http://thesis.anu.edu.au./public/adt-ANU20030421.212730.

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The main aim of this work is to examine fracture toughness improvement mechanisms of a composite material containing tough interlayers modified with large thermoplastic particles. ¶ Various vinyl-ester (VE)/ poly(acrylonitrile-butadiene-styrene) (ABS) blends were used for the interlayer-toughening of a VE/glass fibre composite to increase delamination resistance of the material under mode I and mode II loading. Dry ABS powder was mixed with the liquid resin in four different weight ratios: 3.5, 7, 11 and 15 phr (parts per hundred parts of resin) while the layer thickness was varied from 150 to 500um. Firstly, the tensile and mode I fracture toughness properties of the VE/ABS blends were assessed, and, by using the Raman Spectroscopy technique, a chemical reaction was discovered which occurred during ABS/VE mixing. This reaction consisted of butadiene dissolution from the ABS particles into the VE. Also, butadiene saturation within the VE was achieved at a composition of around 7% ABS particle content. Both mode I and mode II fracture toughness of the composite were significantly improved with the application of interlayers. Mode I fracture toughness GIc was found to be a function of interlayer thickness and ABS particle content variations, with the latter dominating GIc after the saturation point. Mode II fracture toughness was found to be independent of interlayer thickness and only moderately influenced by particle content. The toughening mechanisms that were the most influential within this interlayered material were plastic deformation and micro-cracking of the layer materials. Evidence of both mechanisms was found using optical and scanning electron microscopy (SEM). ¶ A numerical analysis was conducted, using the experimental results from this study, to further explain the basic toughening mechanisms and fracture behaviour in the materials. The aim of the analysis was to examine the influence of the particles on the plastic zone size that develops in front of the crack tip, and the interaction between the particles and the crack tip. For this purpose FEA elastic-plastic crack propagation models were employed. Good agreement with the experimental data was found.

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Luo, Hongze. "Polymer/nano-organic composite proton exchange membranes for direct methanol fuel cell application." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The proton exchange membrane is one key component of direct methanol fuel cells, which has double functions of conducting protons, separating fuels and oxidant. At present, the performance and price of sulfonic acid proton exchange membrane used in direct methanol fuel cells are deeply concerned. In order to reduce membrane 's cost and improve performance of Nafion membrane, three different kinds of membranes have been studied in this thesis. These membranes are SPEEK membranes, SPEEK/ZP composite membranes and Nafion/ZP composite membranes.

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Visaveliya, Nikunjkumar [Verfasser], Michael [Akademischer Betreuer] Köhler, Uwe [Akademischer Betreuer] Ritter, and Christophe [Akademischer Betreuer] Serra. "Microfluidic Synthesis and Assembly of Multi-Scale Polymer Composite Particles Towards Sensoric and Labeling Applications / Nikunjkumar Visaveliya. Betreuer: Michael Köhler. Gutachter: Uwe Ritter ; Christophe Serra." Ilmenau : Universitätsbibliothek Ilmenau, 2016. http://d-nb.info/1081935375/34.

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Visaveliya, Nikunjkumar Verfasser], Michael [Akademischer Betreuer] [Köhler, Uwe [Akademischer Betreuer] Ritter, and Christophe [Akademischer Betreuer] Serra. "Microfluidic Synthesis and Assembly of Multi-Scale Polymer Composite Particles Towards Sensoric and Labeling Applications / Nikunjkumar Visaveliya. Betreuer: Michael Köhler. Gutachter: Uwe Ritter ; Christophe Serra." Ilmenau : Universitätsbibliothek Ilmenau, 2016. http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2015000547.

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Books on the topic "Composite polymer particles"

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Nanocomposite structures and dispersions: Science and nanotechnology--fundamental principles and colloidal particles. Amsterdam: Elsevier, 2006.

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Louis, P. Computer simulation of spatial arrangement and connectivity of particles in three-dimensional microstructure: Application to model electrical conductivity of polymer matrix composite. [Washington, DC: National Aeronautics and Space Administration, 1996.

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T, Bhatt Ramakrishna, and United States. National Aeronautics and Space Administration., eds. The effect of polymer char on nitridation kinetics of silicon. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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T, Bhatt Ramakrishna, and United States. National Aeronautics and Space Administration., eds. The effect of polymer char on nitridation kinetics of silicon. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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5

Adams, W. Wade, and Ronald K. Eby. The Materials Science and Engineering of Rigid-Rod Polymers: Symposium Held November 28-December 2, 1988, Boston, Massachusetts, U.S.A. (Materials Research Society Symposium Proceedings). Materials Research Society, 1990.

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Wade, Adams W., Eby Ronald K. 1929-, McLemore Donald E, and Materials Research Society, eds. The Materials science and engineering of rigid-rod polymers: Symposium held November 28-December 2, 1988, Boston, Massachusetts, U.S.A. Pittsburgh, Pa: Materials Research Society, 1989.

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1921-, Atwater H. A., Houle Frances A, and Lowndes Douglas H, eds. Surface chemistry and beam-solid interactions: Symposium held November 26-29, 1990, Boston, Massachusetts, U.S.A. Pittsburgh, Pa: Materials Research Society, 1991.

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Book chapters on the topic "Composite polymer particles"

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Ramdani, Noureddine. "Functionalization Methods of Ceramic Particles." In Polymer and Ceramic Composite Materials, 47–68. Boca Raton : Taylor & Francis, CRC Press, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/b22371-3.

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Panin, Sergey V., Lyudmila A. Kornienko, Nguyen Duc Anh, Vladislav O. Alexenko, Dmitry G. Buslovich, and Svetlana A. Bochkareva. "Three-Component Wear-Resistant PEEK-Based Composites Filled with PTFE and MoS2: Composition Optimization, Structure Homogenization, and Self-lubricating Effect." In Springer Tracts in Mechanical Engineering, 275–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_13.

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AbstractThe aim of this work was to design and optimize compositions of three-component composites based on polyetheretherketone (PEEK) with enhanced tribological and mechanical properties. Initially, two-component PEEK-based composites loaded with molybdenum disulfide (MoS2) and polytetrafluoroethylene (PTFE) were investigated. It was shown that an increase in dry friction mode tribological characteristics in metal-polymer and ceramic-polymer tribological contacts was attained by loading with lubricant fluoroplastic particles. In addition, molybdenum disulfide homogenized permolecular structure and improved matrix strength properties. After that, a methodology for identifying composition of multicomponent PEEK-based composites having prescribed properties which based on a limited amount of experimental data was proposed and implemented. It was shown that wear rate of the “PEEK + 10% PTFE + 0.5% MoS2” composite decreased by 39 times when tested on the metal counterpart, and 15 times on the ceramic one compared with neat PEEK. However, in absolute terms, wear rate of the three-component composite on the metal counterpart was 1.5 times higher than on the ceramic one. A three-fold increase in wear resistance during friction on both the metal and ceramic counterparts was achieved for the “PEEK + 10% PTFE + 0.5% MoS2” three-component composite compared with the “PEEK + 10% PTFE”. Simultaneous loading with two types of fillers slightly deteriorated the polymer composite structure compared with neat PEEK. However, wear rate was many times reduced due to facilitation of transfer film formation. For this reason, there was no microabrasive wear on both metal and ceramic counterpart surfaces.

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Tessema, Addis, and Addis Kidane. "The Effect of Particles Size on the Thermal Conductivity of Polymer Nanocomposite." In Composite, Hybrid, and Multifunctional Materials, Volume 4, 151–56. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06992-0_19.

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Moarref, Roxana, and Saeed Pourmahdian. "Preparation of Fe3O4/Polymethyl Methacrylate Composite Particles from Monolayer Oleic Acid-Modified Fe3O4." In Eco-friendly and Smart Polymer Systems, 371–74. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45085-4_89.

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Okubo, Masayoshi, Hiroshi Yonehara, and Toru Kurino. "Production of micron-sized, monodisperse polystyrene/poly(n-butyl methacrylate) composite particles having “Hamburger- like” morphology by seeded polymerization." In Aqueous Polymer Dispersions, 22–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b12130.

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Okubo, Masayoshi, Hiroshi Yonehara, and Toru Kurino. "Production of micron-sized, monodisperse polystyrene/poly(n-butyl methacrylate) composite particles having “Hamburger- like” morphology by seeded polymerization." In Aqueous Polymer Dispersions, 22–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-36474-0_5.

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Maximean, D. Mănăilă, O. Dănilă, B. Ştefănescu, R. Bena, C. RoŞu, D. Donescu, and V. Eugeniu. "Study of a New Colloidal Composite: Polymer-Magnetite Particles/Lyotropic Liquid Crystal." In 3rd International Conference on Nanotechnologies and Biomedical Engineering, 226–29. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-736-9_56.

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Okubo, Masayoshi, Ryu Takekoh, and Naohika Saito. "Some factors affecting “onion-like” multilayered morphology of micron-sized, monodisperse, poly(methyl methacrylate)/polystyrene composite particles reconstructed by the solvent-absorbing /releasing method." In Aqueous Polymer Dispersions, 73–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b12141.

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Okubo, Masayoshi, Ryu Takekoh, and Naohika Saito. "Some factors affecting “onion-like” multilayered morphology of micron-sized, monodisperse, poly(methyl methacrylate)/polystyrene composite particles reconstructed by the solvent-absorbing /releasing method." In Aqueous Polymer Dispersions, 73–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-36474-0_15.

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Muller, Miroslav, Martin Tichý, Monika Hromasová, Jan Novotný, Anna Rudawska, and Viktor Kolář. "Material Reuse of Waste Abrasive Particles from Abrasive Water Jet Technology in the Field of Polymer Particle Composite Systems." In Advances in Manufacturing Engineering and Materials II, 87–99. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71956-2_8.

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Conference papers on the topic "Composite polymer particles"

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Lu, Lu, Shan Hu, and Yayue Pan. "3D Printed Particle-Polymer Composites With Acoustically Localized Particle Distribution for Thermal Management Applications." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6643.

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The particle-polymer composite can perform multiple functionalities according to particle property, local particle distribution, and alignment. This paper shows thermal management applications of in situ manipulations of particle dispersion patterns within a 3D printed polymeric composite architecture. A 3D printed particle-polymer composite with enhanced thermal conductive properties was developed. Composite structures containing 30-micron-sized aluminum particles embedded in the acrylate polymer were produced using a novel acoustic field assisted projection based Stereolithography process. Thermal properties of the pure polymer and prepared uniform composite with 2.75 wt% particle were characterized by using the transient hot bridge technique. To investigate the effect of material composition and particle distribution pattern on composite thermal behavior, heat sinks were designed and fabricated with the pure polymer, homogeneous composite with particles uniformly distributed in the polymer matrix, and composite with patterned particles for comparison. Infrared thermal imaging was performed on the 3D printed objects. The homogeneous composites displayed slight enhancement in thermal conductivity. A significant improvement of heat dissipation speed was observed for the patterned composite, due to a densely interconnected aluminum aggregate network. To further improve the thermal property of the patterned composite, varying layer thicknesses were tested. The developed patterned composites with superior performance compared to the inherent polymer material and homogeneous composites can be used for fabricating thermal management applications in electronic and fluidic devices.

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Hwang, Ho-Sang, Bum-Kyoung Seo, and Kune-Woo Lee. "Strippable Core-Shell Polymer Emulsion for Decontamination of Radioactive Surface Contamination." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40193.

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In this study, the core-shell composite polymer for decontamination from the surface contamination was synthesized by the method of emulsion polymerization and blends of polymers. The strippable polymer emulsion is composed of the poly(styrene-ethyl acrylate) [poly(St-EA)] composite polymer, poly(vinyl alcohol) (PVA) and polyvinylpyrrolidone (PVP). The morphology of the poly(St-EA) composite emulsion particle was core-shell structure, with polystyrene (PS) as the core and poly(ethyl acrylate) (PEA) as the shell. Core-shell polymers of styrene (St)/ethyl acrylate (EA) pair were prepared by sequential emulsion polymerization in the presence of sodium dodecyl sulfate (SDS) as an emulsifier using ammonium persulfate (APS) as an initiator. Related tests and analysis confirmed the success in synthesis of composite polymer. The products are characterized by FT-IR spectroscopy, TGA that were used, respectively, to show the structure, the thermal stability of the prepared polymer. Two-phase particles with a core-shell structure were obtained in experiments where the estimated glass transition temperature and the morphologies of emulsion particles. Decontamination factors of the strippable polymeric emulsion were evaluated with the polymer blend contents.

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Tan, Daniel Q., Qin Chen, Patricia Irwin, and Yu U. Wang. "Effect of polar particles on polymer composite dielectrics." In 2012 Joint 21st IEEE ISAF / 11th IEEE ECAPD / IEEE PFM (ISAF/ECAPD/PFM). IEEE, 2012. http://dx.doi.org/10.1109/isaf.2012.6297744.

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Gong, Zhen, Christoph Ostwald, Nicolai M. Hoinka, Benedikt Mohr, Thomas Fuhrmann-Lieker, and Alexander Lorenz. "Ferroelectric particles in LC and polymer composite test devices." In Liquid Crystals XXIII, edited by Iam Choon Khoo. SPIE, 2019. http://dx.doi.org/10.1117/12.2530502.

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Ganguli, Sabyasachi, Ajit K. Roy, David Anderson, and Josh Wong. "Thermally Conductive Epoxy Nanocomposites." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43347.

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The quest for improvement of thermal conductivity in aerospace structures is gaining momentum. This is even more important as modern day aerospace structures are embedded with electronics which generate considerable amounts of heat energy. This generated heat if not dissipated might potentially affect the structural integrity of the composite structure. The use of polymer based composites in aerospace applications has also increased due to their obvious superior specific properties. But the thermal conductivity of the polymer matrix is very low and not suited for the design demands in aerospace applications. Several research studies have been conducted to improve the thermal conductivity of the polymeric composites. Different fillers have been used to improve the thermal conductivity of the polymeric matrix. Fillers may be in the form of fibers or in the form of particles uniformly distributed in the polymer matrix. The thermophysical properties of fiber filled composites are anisotropic, except for the very short, randomly distributed fibers, while the thermophysical properties of particle filled polymers are isotropic. Numerous studies have also been conducted in recent years where nanoparticles have been dispersed in the polymeric matrix to improve the thermal conductivity. Putman et al. [1] used the 3ω method to study the thermal conductivity of composites of nanoscale alumina particles in polymethylmethacrylate (PMMA) matrices in the temperature range 40 to 280 K. For 10% of 60 nm of alumina particle filler by weight (3.5% by volume) thermal conductivity of the composite slightly decreased at low temperatures. Whereas, above 100 K, thermal conductivity of the nanocomposite increased by 4% at room temperature. Kruger and Alam [2] studied the thermal conductivity of aligned, vapor grown carbon nanoscale fiber reinforced polypropylene composite. They measured thermal conductivity by laser flash instrument in the longitudinal and transverse directions for 9%, 17% and 23% fiber reinforcements by volume. The values of thermal conductivity as reported by them were 2.09, 2.75, 5.38 W/m.K for the longitudinal directions and 2.42, 2.47, 2.49 W/m-K for the transverse direction respectively, while the thermal conductivity of unfilled PP was 0.24 W/m-K. Exfoliated graphite platelets are another filler material of promise for improving the thermo-mechanical properties of the polymeric matrix. Aylsworth [3, 4] developed and proposed expanded graphite as reinforcement of polymers in 1910s. Lincoln and Claude [5] in 1980s proposed the dispersion of intercalated graphite in polymeric resins by conventional composite processing techniques. Since that time, research has been conducted on exfoliated graphite reinforced polymers using graphite particles of various dimensions and a wide range of polymers. Drzal et al. [6] have demonstrated the use of exfoliated graphite platelets to enhance the thermal and mechanical properties of polymeric resins. They concluded that composites made by in situ processing have better mechanical properties compared to composites made by melt-mixing or other ex situ fabrication methods due to better dispersion, prevention of agglomeration and stronger interactions between the reinforcement and the polymer. In the present study we use silver nano-filaments, nickel nano-filaments, alumina and exfoliated graphite platelets to enhance the thermal conductivity of an epoxy thermoset resin. The objective of this research is to identify the right filler to achieve the thermal conductivity as required by aerospace design engineers which is around 10 W/ m-K. An arbitrary filler loading of 8 wt% was chosen to compare the different fillers used in this study.

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Oh, Dong-Wook, Young Kim, Jun Seok Choi, Ook Joong Kim, and Kong Hoon Lee. "Thermal Characterization of Polymer Composites by Using the 3-Omega Method." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17762.

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Polymer composites having comparable thermal conductivity to stainless steel at room temperature are commercially available nowadays. Metal or carbon fiber and particles are added to base polymers to enhance mechanical and thermal performance. However for polymer composites having high additive concentration, characterizing mechanical and thermal properties of the composite may be a challenging problem due to an-isotropic natural and non-homogeneity. In this paper, a novel thermal property measurement method based on the 3-omega (3ω) is proposed for thermal analysis of polymer composites. Sensitivity and feasible limit of the 3ω method with “boundary mismatch assumption” is analyzed for measurement of polymer composites having broad range of thermal conductivity.

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Baah, David, Julaunica Tigner, Bernard Britton, and Tamara Floyd-Smith. "Microfluidics for Controlled Production of Thin Films and Particles." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75108.

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Tailored materials with nano to micron dimensions are becoming increasingly important for niche applications in optics, personnel protection and biomedicine. Microfluidics is a robust platform for producing these tailored materials because of the spatial control that can be realized in microfluidic systems due to laminar flow profiles and small dimensions. For this work, a pre-polymer solution, consisting of water, polyethylene glycol diacrylate (PEGDA) and a photo-initiator, flows through a microfluidic channel. For the general scheme, the pre-polymer is exposed to UV light in the microfluidic channel to crosslink the polymer. Depending on the application, the model pre-polymer, PEGDA, may need to be substituted with a different photo-polymerizable pre-polymer to address issues such as chemical compatibility and moisture stability prior to commercialization. Nonetheless, proof-of-concept is demonstrated using PEGDA with results that are transferrable to other photo-polymerizable pre-polymers. For this work, two distinct applications will be presented. In one application, the pre-polymer has a graded profile of nanoparticles. The nanoparticles modify the refractive index of the heterogeneous material and allow light to be directed through the material according to Snell’s Law. When the pre-polymer solution is polymerized, a thin film with a controlled refractive index profile is produced with potential for waveguiding applications. In a second application, the light is masked during UV exposure to produce particles instead of thin films. The particles can be of any two-dimensional extruded shape. If the pre-polymer solution is loaded with ceramic nanoparticles and sintered, ceramic particles that retain the shape of the original composite particle are produced. To date, numerous particle cross sections of polymeric particles and limited ceramic particles have been demonstrated with applications in liquid body armor, abrasives and drug delivery.

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Burris, David L., and W. Gregory Sawyer. "Tribological Investigation of a Low Friction, Low Wear Polymer/Polymer Composite." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63524.

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Wear resistant and low friction solid lubricants offer the design engineer attractive options for extreme environment lubrication, particularly in situations where the use of fluid lubricants are precluded. Past work with wear resistant PTFE nanocomposites made with sub 100nm particles of alumina showed that the nanoparticles decorate the PTFE surface during jet-milling process. Subsequent compression molding of these powders is believed to result in a compartmentalize PTFE composite. It is hypothesized that these reinforcing nanoparticles arrest crack propagation, although there is qualitative evidence that they weaken strength of the composite. The hypothesis for this investigation was to use small particles of PEEK as the filler, which can act to compartmentalize damage and form a structural filler network that would not require matrix/filler strength for mechanical integrity. The tribological properties of composite samples ranging from 0–100 weight percent PEEK filled PTFE were evaluated in this study.

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Herlihy, Kevin P., and Joseph M. DeSimone. "Magneto-polymer composite particles fabricated utilizing patterned perfluoropolyether elastomer molds." In Advanced Lithography, edited by Michael J. Lercel. SPIE, 2007. http://dx.doi.org/10.1117/12.712058.

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Widdowson, Denise, Paris von Lockette, Anil Erol, and Manuel A. Rodriguez. "A Computational Framework for Predicting Properties From Multifield Processing Conditions in Polymer Matrix Composites." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2390.

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Abstract Composites can be tailored to specific applications by adjusting process variables. These variables include those related to composition, such as volume fraction of the constituents and those associated with processing methods, methods that can affect composite topology. In the case of particle matrix composites, orientation of the inclusions affects the resulting composite properties, particularly so in instances where the particles can be oriented and arranged into structures. In this work, we study the effects of coupled electric and magnetic field processing with externally applied fields on those structures, and consequently on the resulting material properties that arise. The ability to vary these processing conditions with the goal of generating microstructures that yield target material properties adds an additional level of control to the design of composite material properties. Moreover, while analytical models allow for the prediction of resulting composite properties from constituents and composite topology, these models do not build upward from process variables to make these predictions. This work couples simulation of the formation of microscale architectures, which result from coupled electric and magnetic field processing of particulate filled polymer matrix composites, with finite element analysis of those structures to provide a direct and explicit linkages between process, structure, and properties. This work demonstrates the utility of these method as a tool for determining composite properties from constituent and processing parameters. Initial particle dynamics simulation incorporating electromagnetic responses between particles and between the particles and the applied fields, including dielectrophoresis, are used to stochastically generate representative volume elements for a given set of process variables. Next, these RVEs are analyzed as periodic structures using FEA yielding bulk material properties. The results are shown to converge for simulation size and discretization, validating the RVE as an appropriate representation of the composite volume. Calculated material properties are compared to traditional effective medium theory models. Simulations allow for mapping of composite properties with respect to not only composition, but also fundamentally from processing simulations that yield varying particle configurations, a step not present in traditional or more modern effective medium theories such as the Halpin Tsai or double-inclusion theories.

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Reports on the topic "Composite polymer particles"

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Chattopadhyay, Aditi. Damage Precursor Detection in Polymer Matrix Composites Using Novel Smart Composite Particles. Fort Belvoir, VA: Defense Technical Information Center, September 2016. http://dx.doi.org/10.21236/ad1018261.

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Kennedy, Alan, Mark Ballentine, Andrew McQueen, Christopher Griggs, Arit Das, and Michael Bortner. Environmental applications of 3D printing polymer composites for dredging operations. Engineer Research and Development Center (U.S.), January 2021. http://dx.doi.org/10.21079/11681/39341.

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This Dredging Operations Environmental Research (DOER) technical note disseminates novel methods to monitor and reduce contaminant mobility and bioavailability in water, sediments, and soils. These method advancements are enabled by additive manufacturing (i.e., three-dimensional [3D] printing) to deploy and retrieve materials that adsorb contaminants that are traditionally applied as unbound powders. Examples of sorbents added as amendments for remediation of contaminated sediments include activated carbon, biochar, biopolymers, zeolite, and sand caps. Figure 1 provides examples of sorbent and photocatalytic particles successfully compounded and 3D printed using polylactic acid as a binder. Additional adsorptive materials may be applicable and photocatalytic materials (Friedmann et al. 2019) may be applied to degrade contaminants of concern into less hazardous forms. This technical note further describes opportunities for U.S. Army Corps of Engineers (USACE) project managers and the water and sediment resource management community to apply 3D printing of polymers containing adsorptive filler materials as a prototyping tool and as an on-site, on-demand manufacturing capability to remediate and monitor contaminants in the environment. This research was funded by DOER project 19-13, titled “3D Printed Design for Remediation and Monitoring of Dredged Material.”

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Seferis, James C. Nano-Particle Control of Void Formation and Expansion in Polymeric and Composite Systems. Fort Belvoir, VA: Defense Technical Information Center, July 2006. http://dx.doi.org/10.21236/ada452054.

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Seferis, James C. Nano Particle Control of Void Formation and Expansion in Polymeric and Composite Systems. Fort Belvoir, VA: Defense Technical Information Center, May 2009. http://dx.doi.org/10.21236/ada639922.

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