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Search results for: composities and polymers
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Structure and thermoelectric properties of bismuth telluride—Carbon composites
PublicationCarbon nanotubes and amorphous carbon have been introduced into a bismuth telluride matrix (0.15 and 0.30 wt.% ratio) to investigate the influence of the carbon on the composite’s thermoelectric properties. Composites with well-dispersed additives have been obtained by sonication and ball-milling methodology. Carbon nanotubes and an amorphous carbon addition led to a decrease in electric conductivity from 1120 S/cm to 77 S/cm....
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A new concept of measuring the friction forces for cartilage and polymers with viscoelastic properties
PublicationReferat przedstawia nową koncepcję dotyczącą pomiaru niskich sił tarcia oraz właściwości materiałów lepkosprężystych. Zaprezentowano: ogólny zarys metody pomiaru, wskazania dotyczące projektowania i budowy urządzenia pomiarowego, model matematyczny oraz sposób identyfikacji parametrów modelu. Metoda ta jest szczególnie przydatna w przypadku analizy właściwości materiałowej polimerów oraz tkanki chrząstki stawowej człowieka, zarówno...
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Modelling of optical components made of liquid crystals and liquid crystalline polymers
PublicationW artykule przedstawiono koncepcję wykorzystania ciekłych kryształów i polimerów ciekłokrystalicznych do budowy dwójłomnych elementów optycznych - płytek opóźniających, pryzmatów Wollastona i Nomarskiego. Przedstawiono wyniki modelowania pryzmatów Nomarskiego wykonanych z polimerów ciekłokrystalicznych i dokonano porównania ich właściwości z właściwościami pryzmatów wykonanych z typowych materiałów dwójłomnych.
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The Application of Phenolic Acids in The Obtainment of Packaging Materials Based on Polymers—A Review
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Star Polymers vs. Dendrimers: Studies of the Synthesis Based on Computer Simulations
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Bringing a New Flexible Mercaptoacetic Acid Linker to the Design of Coordination Polymers
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The use of fibre-reinforced polymers (FRP) in bridges as a favourable solution for the environment
PublicationThe purpose of this article is to show the modern engineering, in which sustainability and taking care of ecology play a significant role. The authors are focused on FRP composite materials and their applications in civil engineering. Case studies showing renovation and design of new bridges with the use of FRP are presented and discussed to clarify benefits, which this solution provides. Main advantages of FRP materials in comparison...
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AGREEMIP: The Analytical Greenness Assessment Tool for Molecularly Imprinted Polymers Synthesis
PublicationMolecular imprinting technology is well established in areas where a high selectivity is required, such as catalysis, sensing, and separations/sample preparation. However, according to the Principles of Green Chemistry, it is evident that the various steps required to obtain molecularly imprinted polymers (MIPs) are far from ideal. In this regard, greener alternatives to the synthesis of MIPs have been proposed in recent years....
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The influence of the type of composition of PVA-chitosan blends on stability at elevated temperature
Open Research DataThe dataset shows the results of a visual evaluation of chitosan and polyvinyl alcohol composites. The composites were prepared by combining chitosan water solutions, dissolved in selected acids, and polyvinyl alcohol solution, freeze drying, and heating at 150°C dry composites. The results confirm that the chitosan / PVA composites, in which the first...
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Euilibrium composition of CH4-CO2-CO-H2-H2O-C system under various compositions syngas methanation
Open Research DataThe equilibrium compositions of CH4, CO2, CO, H2, H2O and C under the methanation reaction of various syngas mixtures (different CO/H2 ratio) were supplied with this dataset
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Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites
PublicationDue to growing restrictions on the use of halogenated flame retardant compounds, there is great research interest in the development of fillers that do not emit toxic compounds during thermal decomposition. Polymeric composite materials with reduced flammability are increasingly in demand. Here, we demonstrate that unmodified graphene and carbon nanotubes as well as basalt fibers or flakes can act as effective flame retardants...
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Janusz Datta prof. dr hab. inż.
PeopleIn 1988, Janusz Datta finished his studies at the Gdańsk University of Technology (GUT), Faculty of Chemistry. Since then he has been employed at the Faculty of Chemistry in the Department of Polymer Technology. During the first six years of employement he was worked as a scientist. In this period, he travelled extensively to ZACHEM company located in Bydgoszcz to gain practical experience related to chemical processing. In 1994,...
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ADVANCES IN POLYMER TECHNOLOGY
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Preparation of a Ceramic Matrix Composite Made of Hydroxyapatite Nanoparticles and Polylactic Acid by Consolidation of Composite Granules
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Krzysztof Formela dr inż.
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ADVANCED COMPOSITES LETTERS
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Composites Theory and Practice
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Nano Hybrids and Composites
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Conducting Polymer Microelectrodes Anchored to Hydrogel Films
PublicationArtykuł prezentuje wytwarzanie organicznych hydrożeli z mikroelektrodami poli(3,4-ethylenedioxythiophene, PEDOT), które wykazują obniżoną rezystywność 100 Ω/□. Proces przygotowania rozpoczyna się elektroosadzania przewodzącego PEDOT (ok. 20 S/cm) na mikroelektrodach Pt. Elektrolityczne wiąże się film PEDOT z hydrożelem. Tak wytworzona struktura jest odrywana elektrycznie pd podłoża.
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Review: synthetic polymer hydrogels for biomedical applications
PublicationSynthetic polymer hydrogels constitute a group of biomaterials, used in numerous biomedical disciplines, and are still developing for new promising applications. The aim of this study is to review information about well known and the newest hydrogels, show the importance of water uptake and cross-linking type and classify them in accordance with their chemical structure.
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Investigations of a new humidity sensor with polymer film
PublicationPrzedstawiono wyniki badań impedancyjnych nowego czujnika wilgotności z filmem polimerowym. Jako polimer wykorzystano chemicznie modyfikowaną polietylenoiminę.
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Biodegradable polymer packaging materials - influence on environment
PublicationAwareness of the waste problem and its impact on the environment has awakened new interest in the area of biodegradable polymers. Biodegradation of various polymers have been studied under diverse environments like in soil, in sewage sludge, in compost conditions and in sea water by different research groups. The aim of this paper is to present the research methods on the biodegradation of the commercially available biodegradable...
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Electrical properties of polymer coatings modified with nanoadditives
PublicationW pracy przedstawiono właściwości elektryczne (antystatyczne, rezystancję powierzchniową) polimerowych powłok. Pokazano wpływ różnych domieszek na czasy rozładowania się warstwy oraz na jej rezystancję powierzchniową.
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Mechanism for sonocoating a polymer surface with nano-hydroxyapatite
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Raman investigation of hybrid polymer thin films
PublicationPrzestawiono problemy diagnostyki ramanowskiej transparentnych struktur cienkowarstwowych wykonanych metodą zol-żel z polimerów hybrydowych. Analizowano możliwości badania struktury molekularnej i grubości, a także określania jakości wykonania struktur falowodowych. Przedstawiono wyniki badań wykonanych mikroskopem ramanowskim dla polimerowych struktur cienkowarstwowych osadzonych na podłożach szklanych i krzemowych.
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Biodegradable Polymer Packaging Materials in Seawater Environment
PublicationIn this chapter, our interest is directed into dea/ocean/lakes biodegradable environment for polymer packaging materials from two different points of view.
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Green Polymer Nanocomposites for Skin Tissue Engineering
PublicationFabrication of an appropriate skin scaffold needs to meet several standards related to the mechanical and biological properties. Fully natural/green scaffolds with acceptable biodegradability, biocompatibility, and physiological properties quite often suffer from poor mechanical properties. Therefore, for appropriate skin tissue engineering and to mimic the real functions, we need to use synthetic polymers and/or additives as complements...
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Study on polymer modified road asphalt mixture
PublicationThe formulation of ternary asphalt-additives blend composed of crumb rubber : low-density polyethylene (CR : LDPE) and crumb rubber : textile fiber (CR : TF) couples, and quaternary asphalt additives-blend composed of (CR : LDPE : TF) triplets on the virgin asphalt to optimize the asphalt basic and rheological properties and to use the extrusion process of two or three additives to obtain composite materials of them, as well as...
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Inhibition of Polymer Photodegradation by Incorporation of Coffee Silverskin
PublicationOver the last years, the trend associated with the incorporation of materials from renewable resources into polymer technology is getting significantly more vital. Researchers are trying to transfer the properties of natural raw materials into the polymer world. Therefore, different natural materials are more often investigated as potential additives for polymers. Such an effect is noted for the coffee industry by-products, such...
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THERMOPLASTIC POLYMER MACHINE GUARDS – EXPLOITATION SAFETY
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Polymer Science - Series D
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International Polymer Science and Technology
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Carbohydrate Polymer Technologies and Applications
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Polymer-Plastics Technology and Materials
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POLYMER SCIENCE SERIES C
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Thermomechanical and Fire Properties of Polyethylene-Composite-Filled Ammonium Polyphosphate and Inorganic Fillers: An Evaluation of Their Modification Efficiency
PublicationThe development of new polymer compositions characterized by a reduced environmental impact while lowering the price for applications in large-scale production requires the search for solutions based on the reduction in the polymer content in composites’ structure, as well as the use of fillers from sustainable sources. The study aimed to comprehensively evaluate introducing low-cost inorganic fillers, such as copper slag (CS),...
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Structural evaluation of percolating, self-healing polyurethane–polycaprolactone blends doped with metallic, ferromagnetic, and modified graphene fillers
PublicationComposites with differently shaped micro- and nanofillers show various, unique thermal, and physicochemical properties when mixed with carefully chosen polymer matrix. Selected composition holds strategic value in achieving desired properties that is biodegradability, thermoelectric conductivity, and shape memory for organic coating. The main aim of this work is to briefly examine structural changes after reaching percolation...
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Effect of starch fillers on the dynamic mechanical properties of rubber biocomposite materials
PublicationIn the paper the results of dynamic mechanical study of the biocomposites containing one of two types of (potato or corn) strach used as fillers in different amount were discussed. The composites were obtained from rubbery mixture containing natural rubber (NR) as a main component. Thermomechanical analyses (by DMA) showed that the used quantity of strach fillers only slightly influence on the glass transition temperature of vulcanizates.
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Submicron inorganic particles as an additional filler in hybrid epoxy matrix composites reinforced with glass fibres
PublicationIn this study, the effect of selected submicron metal oxide (zinc oxide, titanium oxide) or non-metal oxide (silicon dioxide) particles on mechanical and thermo-mechanical properties of epoxy/glass composites was investigated. The applied epoxy resin was a diglycidyl ether of bisphenol-A cured with triethylenetetramine. As a reinforcement twill weave E-glass fabric was used. Hybrid composites (contained particulate and fibrous...
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Structural evaluation of percolating, self-healing polyurethane–polycaprolactone blends doped with metallic, ferromagnetic, and modified graphene fillers
PublicationComposites with differently shaped micro- and nanofillers show various, unique thermal, and physicochemical properties when mixed with carefully chosen polymer matrix. Selected composition holds strategic value in achieving desired properties that is biodegradability, thermoelectric conductivity, and shape memory for organic coating. The main aim of this work is to briefly examine structural changes after reaching percolation threshold...
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The impact of natural fibers’ characteristics on mechanical properties of the cement composites
PublicationThe paper reviews the properties of cement composites reinforced with short fibres. The effect of natural fibres was investigated: cotton, sisal, jute, ramie, bamboo, and synthetic fibres: polymer and polypropylene. It was noticed that the fibres change the consistency of the mixture up to 15%. In the composite flexural strength tests, a change in strength by +/− 8% was observed, depending on the type of fibres used. The research...
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Mechanics of Advanced Composite Structures
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JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
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Electrochemical synthesis and characterization of nanocomposites based on poly(3,4-ethylenedioxythiophene) and functionalized carbon nanotubes
PublicationThis work is focused on new composite materials consisting of poly(3,4-ethylenedioxythiophene) (pEDOT) and functionalized multi-walled carbon nanotubes synthesized electrochemically. Three types of composites were synthesized: the first one containing carbon nanotubes with carboxyl groups (covalent functionalization), the second one containing oxidized carbon nanotubes ox-MWCNTs (with different oxygen-rich polar groups) (covalent...
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Effect of modified soybeen oil amount on rheological characteriza-tion of polyurethane pre-polymers
PublicationPolyurethanes (Pu’s) are the polymeric materials which have got urethane groups in the structure. The properties of Pu’s depend both on the method of preparation and monomers used. Polyurethanes are produced by two methods known as one step or two step method called as “pre-polymers method”, especially for the case of segmented polyurethanes (SPU’s). These materials are thermoplastic block copolymers of the (AB)n type consisting...
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The effect of mercerized sisal fibres on natural rubber composites' properties
PublicationW pracy omówiono wyniki badań fizyko-mechanicznych kompozytów otrzymanych z mieszanek zawierających kauczuk naturalny oraz statystycznie zdyspergowane krótkie włókno sisalowe. Włókno naturalne przed użyciem poddano merceryzacji.Otrzymane wulkanizaty poddano badaniom wytrzymałościowym w warunkach statycznych w celu określenia wpływu parametrów wulkanizacji i ilości dodanego włókna na właściwości otrzymanych produktów. Stwierdzono...
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All-natural bio-plastics using starch-betaglucan composites
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Weather aging effects on modified asphalt with rubber-polyethylene composites
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Natural composites based on polysaccharide derivatives: preparation and physicochemical properties
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Conductivity of two-dimensional composites with randomly distributed elliptical inclusions
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