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Journal articles on the topic 'Waste polyamide'

Author: Grafiati
Published: 5 June 2025
Last updated: 2 August 2025

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1

Liang, Shuai-Bo, Xiao Ning, Qing-Jin Fu, Qian Liu, and Chun-Li Yao. "The use of a PAE /bentonite binary system to improve the wet strength of paper." BioResources 15, no. 4 (2020): 8449–58. http://dx.doi.org/10.15376/biores.15.4.8449-8458.

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Bentonite and polyamidoamine epichlorohydrin (PAE) resin were added sequentially as a binary system to improve the properties of the paper, especially the wet strength. The results showed that the dry tensile index, the wet tensile index, and the folding endurance of the paper could be improved with only the use of polyamide polyamine epichlorohydrin resin. However, a binary system of polyamide polyamine epichlorohydrin resin and bentonite was more effective. When 0.8% polyamide polyamine epichlorohydrin resin and 0.75% bentonite were added, the dry tensile index, the wet tensile index, and th
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Kim, Kyuhyun, Minsoo Kim, Yerim Kim, et al. "Melt Spinnability Comparison of Mechanically and Chemically Recycled Polyamide 6 for Plastic Waste Reuse." Polymers 16, no. 22 (2024): 3152. http://dx.doi.org/10.3390/polym16223152.

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With the increasing volume of synthetic fiber waste, interest in plastic reuse technologies has grown. To address this issue, physical and chemical recycling techniques for polyamide, a major component of textile waste, have been developed. This study investigates the remelting and reforming properties of four types of pristine and recycled polyamide 6, focusing on how the microstructural arrangement of recycled polyamides affects polymer fiber formation. DSC and FT-IR were used to determine the thermal properties and chemical composition of the reformed thin films. Differences in the elongati
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3

Yekymov, Y., V. Lebedev, T. Tykhomyrova, H. Cherkashina, and A. Kariev. "Design and research of a construction-grade engineering plastic based on recycled polyamides and polyphthalamides." IOP Conference Series: Earth and Environmental Science 1499, no. 1 (2025): 012016. https://doi.org/10.1088/1755-1315/1499/1/012016.

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Abstract The purpose of this article is to design and research a thermoplastic composition based on secondary polyamides and polyphthalamides suitable for construction applications. The scientific novelty of this research lies in the development of a new recycling approach for PPA, where PPA waste is incorporated into a polymer composite as a reinforcing component without complete melting. Unlike conventional methods that require full melting at high temperatures, this approach utilizes finely pulverized PPA particles dispersed within a polyamide 6,6 matrix, allowing low-temperature processing
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Salas, Miguel Ángel, Heriberto Pérez-Acebo, Verónica Calderón, and Hernán Gonzalo-Orden. "Analysis and economic evaluation of the use of recycled polyamide powder in masonry mortars." Polymers 12, no. 11 (2020): 2657. https://doi.org/10.3390/polym12112657.

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Due to the considerable amount of waste plastics and polymers that are produced annually, the introduction of these waste products in construction materials is becoming a recurrent solution to recycle them. Among polymers, polyamide represents an important proportion of polymer waste. In this study sustainable and lightweight mortars were designed and elaborated, substituting the aggregates by polyamide powder waste. Mortars were produced with various dosages of cement/aggregates and the polyamide substitutions were 25%, 50%, 75% and 100% of the aggregates. The aim of this paper is to determin
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5

Lebedev, Vladimir, Maryna Cherkashyna, Alla Sokolova, and Volodymyr Purys. "Research of Modified Polyamide Waste Agglomerate: Regulatory Issues and Technological Features." Key Engineering Materials 988 (September 27, 2024): 99–106. http://dx.doi.org/10.4028/p-si8abm.

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In this article, a regulatory processes study and technological properties of polyamide waste agglomerate modification is carried out. The legal support issues for polymer waste management in Ukraine are considered, ways to improve the most problematic aspects in this area are proposed. The technological properties of polyamide-6 waste agglomerate modification processes were studied in order to improve its technological and strength characteristics. MW-PA CB10 masterbatch modifier impact on the polyamide-6 waste agglomerate technological and strength characteristics complex was studied. It was
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Klushin, V. A., U. A. Chus, and Nina Smirnova. "Synthesis of Furanic Polyamides and Composite Coatings from Plant Biomass." Key Engineering Materials 816 (August 2019): 84–89. http://dx.doi.org/10.4028/www.scientific.net/kem.816.84.

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We report, for the first time, the synthesis of polyamide composite coating based on renewable plant biomass sources. 2,5-furandicarboxylic acid (FDCA) was prepared by catalytic oxidation of 5-hydroxymethylfurfural (HMF) obtained by plant biomass conversion. FDCA was used in the synthesis of aliphatic and aromatic furanic polyamides. Two approaches to furanic PAs synthesis have been investigated: (i) synthesis of hexamethylenediamine furanoate salt and its subsequent polycondensation; (ii) synthesis of FDCA dichloride and its subsequent polycondensation in a two-phase aqueous-organic system. T
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7

Ulewicz, Malgorzata, Jakub Jura, and Adam Gnatowski. "Cement Mortars Based on Polyamide Waste Modified with Fly Ash from Biomass Combustion—A New Material for Sustainable Construction." Sustainability 16, no. 7 (2024): 3079. http://dx.doi.org/10.3390/su16073079.

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The article presents an analysis of the possibility of using the waste of polyamide 6 modified with fly ash (in the amount of 5, 10 and 15%) from the burning of wood–palm kernel shells biomass as an addition to cement mortar. Fly ash from the burning of biomass in a circulating fluidized bed boiler (which currently has no practical use) was first used to produce polyamide 6, and then post-production polymer waste (added at 20, 40 and 60%) was used to produce ecological mortar. The use of this type of waste is both economically profitable and desirable due to the need to implement waste materia
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Salas, Miguel A., Heriberto Pérez-Acebo, Verónica Calderón, and Hernán Gonzalo-Orden. "Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars." Polymers 12, no. 11 (2020): 2657. http://dx.doi.org/10.3390/polym12112657.

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Due to the considerable amount of waste plastics and polymers that are produced annually, the introduction of these waste products in construction materials is becoming a recurrent solution to recycle them. Among polymers, polyamide represents an important proportion of polymer waste. In this study, sustainable and lightweight mortars were designed and elaborated, substituting the aggregates by polyamide powder waste. Mortars were produced with various dosages of cement/aggregates, and the polyamide substitutions were 25, 50, 75, and 100% of the aggregates. The aim of this paper is to determin
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9

Kucukali-Ozturk, Merve, Hande Sezgin, Ipek Yalcin-Enis, and Cem Dolu. "Development of Acoustic and Thermal Insulation Materials from Pantyhose Waste." Materials Science Forum 1082 (March 31, 2023): 265–69. http://dx.doi.org/10.4028/p-2hyf45.

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Population growth, urbanization, industrialization, developing technology, increasing welfare level and changing consumption habits cause solid wastes to increase day by day. There are also sub-waste groups that have not yet been fully recognized among the solid waste groups in which textile wastes have a large share. One of them is pantyhose, which has been indispensable for modern life since the day it was presented to the consumer. These socks, which are made of polyamide and elastane fibers that are easily punctured, run and become unusable when worn once or several times, are generally th
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Aryanti, Fitria Ika, Silvia Silvia, Teguh Budi Santoso, and Alana Lovin Romaro. "Analisis Gugus Fungsi dan Sifat Termal Limbah Jaring Ikan Untuk Produk Otomotif." Jurnal Ilmiah Teknik Kimia 8, no. 2 (2024): 91–97. http://dx.doi.org/10.32493/jitk.v8i2.37885.

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Plastic has been used in daily life due to its durability. Fishing net waste is a type of plastic waste that is dangerous. Fishing net waste can also damage marine biota, such as coral reefs and marine animals. One type of polyamide that is widely used is nylon. Fishing net waste containing nylon has the potential to be recycled. In this research, fishing net waste is used for automotive product applications using a twin-screw extruder. There are five variations: pure polyamide (PA), recycled polyamide (rPA), PA-rPA 50:50, PA-rPA 75:25, and PA-rPA 25:75. To be able to determine the characteris
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Müller, M., J. Žarnovský, and R. Drlička. "Recycling of Polyamide from Scrap Tyres as Polymeric Composites." Research in Agricultural Engineering 61, Special Issue (2016): S79—S83. http://dx.doi.org/10.17221/51/2015-rae.

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Rubber granulate, metal waste and textile waste (polyamide fibres) come into the mechanical process of waste tyres recycling. The pollution and degradation processes are problematic in using of secondary raw material. The matrix was in the form of three various adhesives in testing – two-component epoxy adhesives and a polyester adhesive. The filler was in the form of textile waste (polyamide fibres) from the process of tyres recycling containing approximately 10–12% of rubber granulate. The filler was added in app. 15% of weight ratio into the matrix. The aim of the resear
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da Silva, D. F., Daniella Cibele Bezerra, Lizzia Tanira Albuquerque Reul, Edcleide Maria Araújo, Tomás Jefférson Alves de Mélo, and V. N. Medeiros. "Rheological Study of Polyamide 6/Waste Styrene-Butadiene Rubber (SBR) Blends." Materials Science Forum 727-728 (August 2012): 1908–12. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1908.

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The application of polyamides is limited by low impact performance when notched in room temperature conditions. This situation is worsening, especially for use in temperatures below zero degrees Celsius. One way to outline this limitation is to prepare polymer blends where the dispersed phase is an elastomer, and then classified as an immiscible blend. Therefore, this study aims to develop polyamide 6/waste styrene-butadiene rubber (SBR) blends, with addition of compatibilizer PP-g-MA and PE-g-MA in order to achieve a balance between stiffness and tenacity. The results obtained with the rheolo
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13

Burgada, Francisco, Marina P. Arrieta, Begoña Borrell, and Octavio Fenollar. "Development of Eco-Efficient Composite from Textile Waste with Polyamide Matrix." Polymers 16, no. 14 (2024): 2061. http://dx.doi.org/10.3390/polym16142061.

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The main aim of the present work is to evaluate and characterize the mechanical, morphological and thermal properties of wastes coming from the textile industry, mainly composed of cotton and polyester. These wastes will be thereafter implemented in commodity plastic such as polyamide, in order to develop new formulations of environmentally friendly materials. The composites were produced by extrusion and injection-molded processes in amounts between 15 wt.% and 60 wt.% of textile waste. With the objective of improving the properties of the materials, silanes were used as a compatibilizer betw
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14

Luo, Chuan, Chao Zhang, ShanHao Xu, Hao Wang, Yin Zhang, and Lifeng Yuan. "Determining the Composition of Imported Recycled Plastics with Differential Scanning Calorimetry." E3S Web of Conferences 261 (2021): 02003. http://dx.doi.org/10.1051/e3sconf/202126102003.

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The analysis of the composition of recycled plastics is the prerequisite for identifying the properties of recycled plastics goods-solid waste. This paper systematically studies the composition of crystalline polymers by differential scanning calorimetry, and studies the common blends of polyethylene and polypropylene. The composition of polyamide 6 and polyamide 66 blends, polyethylene and polyamide blends and other common recycled plastics. The standard enthalpy value method and the melting enthalpy area normalization method are compared. The conclusion is that the melting enthalpy area norm
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15

Abraham, Thomas N., K. E. George, and Ton Peijs. "Recyclable PP/Polyamide Composite." Progress in Rubber, Plastics and Recycling Technology 21, no. 1 (2005): 73–83. http://dx.doi.org/10.1177/147776060502100105.

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A commercial grade of polypropylene matrix reinforced with waste polyamide (nylon 6) fibres of two diameters at levels up to 40wt% (100 polypropylene + 40 polyamide) was studied. Smaller diameter fibres showed better mechanical properties than larger diameter ones. Attempts were made to improve the interfacial adhesion between the fibres and the matrix by grafting with maleic anhydride and with also styrene maleic anhydride. The mechanical properties showed significant improvements as a result of these modifications. Thermal stability was also marginally improved. These composites could be eas
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16

SZUSTAKIEWICZ, KONRAD, MALGORZATA GAZINSKA, ADAM KIERSNOWSKI, and JACEK PIGLOWSKI. "Polyamide 6/organomontmorillonite nanocomposites based on waste materials." Polimery 56, no. 05 (2011): 397–400. http://dx.doi.org/10.14314/polimery.2011.397.

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17

Opálková Šišková, Alena, Pavel Pleva, Jakub Hrůza, et al. "Reuse of Textile Waste to Production of the Fibrous Antibacterial Membrane with Filtration Potential." Nanomaterials 12, no. 1 (2021): 50. http://dx.doi.org/10.3390/nano12010050.

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Wasted synthetic fabrics are a type of textile waste source; the reuse of them brings environmental protection and turns waste into a valuable material. In this work, the used nylon (polyamide) stockings were transmuted into a fine fibrous membrane via an electrospinning process. In addition, the safety antibacterial agent, monoacylglycerol (MAG), was incorporated into a recycled fibrous membrane. The results revealed that the neat, recycled polyamide (rPA) fibers with a hydrophobic surface could be converted into hydrophilic fibers by blending various amounts of MAG with rPA solution prior to
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18

Yıldırım, Leyla, and Özlenen Erdem Ìşmal. "Banana peel in dyeing of polyamide/elastane blend fabric." Research Journal of Textile and Apparel 23, no. 2 (2019): 124–33. http://dx.doi.org/10.1108/rjta-07-2018-0043.

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PurposeThe purpose of this paper is to show the dyeing effect of banana peel on polyamide fabric by using various mordants and to reveal alternatives to metallic mordants.Design/methodology/approachThe simultaneous mordanting method was used in the dyeing process.FindingsFrom environmental and economical points of view, this paper studies the use of a natural waste product in textile dyeing. Assessment of domestic organic wastes will provide new possibilities for valorization of biomaterials. It is concluded that colorimetric data are affected by the amount of plant used in extraction, amount
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19

Nikodijević, Milena. "Finishing of polyamide fabric 6 and polyamide 6.6 fabric with some boron compounds." Tekstilna industrija 73, no. 1 (2025): 35–40. https://doi.org/10.5937/tekstind2501035n.

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Textile finishing and dyeing processes consume large amounts of water, dyes and chemicals, which can have a negative impact on the environment. Therefore, alternative, less toxic and biodegradable chemicals are intensively researched. Textile products should be designed so that their production and maintenance cause minimal damage to the environment, while taking care of waste after use. Chemical finishing includes various treatments of fabrics to improve aesthetic and performance properties, including anti-creasing, water repellency, flammability and microorganism finishes. Boron compounds, s
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20

Mondragon, Gurutz, Galder Kortaberria, Eider Mendiburu, Nekane González, Aitor Arbelaiz, and Cristina Peña‐Rodriguez. "Thermomechanical recycling of polyamide 6 from fishing nets waste." Journal of Applied Polymer Science 137, no. 10 (2019): 48442. http://dx.doi.org/10.1002/app.48442.

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21

Borkina, Ya V., and V. L. Fleisher. "Features of electrolyte coagulation of modified polyamide resin and its effect on the properties of paper and cardboard." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 60, no. 4 (2024): 326–39. https://doi.org/10.29235/1561-8331-2024-60-4-326-339.

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The article is devoted to the study of the features of coagulation of a modified polyamide resin for paper and cardboard in the presence of aluminum polyoxychloride. It has been established that the resin under study, the component composition of which is represented by modified polyaminoamides, free resin acid, sodium resinates and maleopimarate, is resistant to water hardness salts, however, the sodium resinates present in its composition are subject to hydrolysis. The process of coagulation of the modified polyamide resin under the influence of aluminum polyoxychloride is multi-stage and en
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22

Ma, Wenjing, and Chuanjin Wang. "Preparation of High-Purity Rutin from Sophora japonica." Advances in Image and Video Processing 12, no. 6 (2024): 135–47. https://doi.org/10.14738/aivp.126.17865.

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High-Purity Rutin (HPR) was extracted from Sophora japonica by ultrasonication, decolorized using activated carbon, separated by polyamide chromatography, and recrystallized. An orthogonal design of experiment was used to determine the optimal ultrasonic extraction time, number of ultrasonic extractions, and ultrasonic extraction temperature to maximize the extraction yield of rutin. The optimal conditions were determined as follows: 2000 mL of CH3OH were used to extract 20 g of the dried Sophora japonica flower bud powder for 30 minutes and the extraction was repeated 2 times under ultrasonic
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Ghasemi, Hesam, Amin Mirzadeh, Philip J. Bates, and Musa R. Kamal. "Effect of Polyamide 66 on the Mechanical and Thermal Properties of Post-Industrial Waste Polyamide 6." Polymer-Plastics Technology and Engineering 53, no. 17 (2014): 1794–803. http://dx.doi.org/10.1080/03602559.2014.935398.

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Garabito, J., A. Rodríguez, S. Gutierrez, and V. Calderón. "Manufacture of Lime Mortars for Restoration with Addition of Polyamide Powder Waste." Advanced Materials Research 687 (April 2013): 532–37. http://dx.doi.org/10.4028/www.scientific.net/amr.687.532.

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We use lime mortar in historic building’s interventions instead of cement mortars, due to its better compatibility with the masonry walls. The objective of the present research is to examine the behavior of a traditional lime mortar by the addition of polyamide powder waste. In certain circumstances we need to improve the mortar properties, such as increasing its impermeability while maintaining its breathability. This happens when we need to coat the filling of a stone wall that has been exposed to the outside. First of all we study the properties of a traditional lime mortar, as a reference.
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Kim, Teayeop, Sunho Park, Yoonkyung Lee, Jangho Kim, and Kyunghoon Kim. "Thin Film Biocomposite Membrane for Forward Osmosis Supported by Eggshell Membrane." Membranes 12, no. 2 (2022): 166. http://dx.doi.org/10.3390/membranes12020166.

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There is a general drive to adopt highly porous and less tortuous supports for forward osmosis (FO) membranes to reduce internal concentration polarization (ICP), which regulates the osmotic water permeation. As an abundant waste material, eggshell membrane (ESM) has a highly porous and fibrous structure that meets the requirements for FO membrane substrates. In this study, a polyamide-based biocomposite FO membrane was fabricated by exploiting ESM as a membrane support. The polyamide layer was deposited by the interfacial polymerization technique and the composite membrane exhibited osmotical
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Yalcinkaya, Baturalp, and Jiri Chaloupek. "Surface Modification of Composite Membranes by Coating PVA/TiO2 Layer." Applied Mechanics and Materials 804 (October 2015): 299–303. http://dx.doi.org/10.4028/www.scientific.net/amm.804.299.

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Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of wast
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27

Sheikh, Hoomaafrin A. R., and Swapnil V. Madhamshettiwar. "Kinetics Study of Acid Hydrolysis of Waste Polyamide-6,6 Using Sodium-1-heptane Sulphonate Surfactant." Oriental Journal Of Chemistry 40, no. 3 (2024): 895–99. http://dx.doi.org/10.13005/ojc/400337.

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In this paper, the depolymerization of waste polyamide-6,6 by using sodium-1- heptane sulphonate as a catalyst was carried out by acid hydrolysis. This method provides the recycling of polyamide into its monomer derivative which is dibenzoyl derivative of hexamethylene diamine. Depolymerization was carried out at different time from 30 min to 180 min by using 0.03g of sodium-1- heptane sulphonate at 80oC by taking various amount of catalyst. Reaction takes place around 120 min to get 78.23 % yield of the product. The product was analyzed by its melting point (154 OC) and FTIR spectra and it wa
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Medeiros, Keila Machado de, Edcleide Maria Araújo, Hélio de Lucena Lira, Diego de Farias Lima, and Carlos Antônio Pereira de Lima. "Hybrid Membranes of Polyamide Applied in Treatment of Waste Water." Materials Research 20, no. 2 (2017): 308–16. http://dx.doi.org/10.1590/1980-5373-mr-2016-0242.

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Moreno, Diego David Pinzón, and Clodoaldo Saron. "Low-density polyethylene/polyamide 6 blends from multilayer films waste." Journal of Applied Polymer Science 136, no. 18 (2019): 47456. http://dx.doi.org/10.1002/app.47456.

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de Carvalho, Thamyres Cardoso, Erbertt Barros Bezerra, Renê Anísio da Paz, Amanda Melissa Damião Leite, Vanessa Nóbrega Medeiros, and Edcleide Maria Araújo. "Study of the Degradability of PA6/Organoclay Nanocomposites." Materials Science Forum 869 (August 2016): 288–92. http://dx.doi.org/10.4028/www.scientific.net/msf.869.288.

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The study of the degradability of PA6 / organoclay nanocomposites was evaluated to minimize the effects of plastic waste in the environment. The use of clays usually accelerates the degradation of nanocomposites. A regional clay (polyamide 6, Polyform - B300) and a quaternary ammonium salt (Cetremide (hexadecyltrimethyl ammonium bromide) were used. The hybrids were obtained in a co-rotating twin screw extruder and the tensile and the impact specimens were obtained through injection. The infrared spectroscopy (FTIR) and the X-ray diffraction (XRD) confirmed the presence of the salt molecules in
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Krotova, Irina, and Vladimir Boev. "NATURAL DYES FROM CONIFEROUS PLANT DEBARKING WASTE." Trade, service, food industry 1, no. 4 (2022): 406–20. http://dx.doi.org/10.17516/2782-2214-0029.

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The need to reduce greenhouse gas emissions into the atmosphere, decarbonization of industrial production makes it urgent to improve many technological schemes, including schemes for complex processing of plant resources. The authors of the article consider the possibility of recycling multi-tonnage waste bark of Siberian coniferous plants to obtain a marketable product – a natural dye for the textile industry. The study showed that the complex of coloring substances of the bark of Siberian fir, spruce and larch is mainly represented by flavonoid compounds, primarily quercetin, dihydroquerceti
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Matykiewicz, Danuta, Tomasz Olszewski, and Jacek Andrzejewski. "Waste Management after the Injection Process by Manufacturing Polyamide Products Based on Regranulate." ChemEngineering 7, no. 3 (2023): 51. http://dx.doi.org/10.3390/chemengineering7030051.

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The aim of the work was to assess the possibility of utilizing the waste generated in the injection molding process for the production of new products based on polyamide 6 reinforced with glass fiber. The manufactured samples were prepared with the addition of 5, 10, 15, and 100 wt.% regrind from the runner system. The impact strength, tensile strength, and hardness of injection products were obtained directly and were assessed after conditioning in distilled water for 24 h. Moreover, the structure of the tested materials was assessed using the FTIR method and their thermal properties using th
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Choi, In Gyu, Tae-Min Lee, Se-Jun Yang, Seung-Ju Oh, Jin-Woo Bae, and Byeong-Uk Nam. "Mechanical Properties and Crystallization Behavior of Surface-Treated Waste Phenol Resin-based Polyamide 6 Composites." Polymer Korea 49, no. 3 (2025): 306–16. https://doi.org/10.7317/pk.2025.49.3.306.

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Navratil, Jan, Miroslav Manas, Michal Stanek, David Manas, Martin Bednarik, and Ales Mizera. "Material Properties of PA6/rPA6x Blend." Applied Mechanics and Materials 752-753 (April 2015): 326–30. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.326.

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This research paper suggests a possible solution for a growing problem of irradiated materials ́ waste processing. Recycled radiation crosslinked polyamide 6 (rPA6x) was used as a filler into non-modified polyamide 6 (PA6) in several concentrations. Influence of the amount of the filler on mechanical properties of resulting blends was investigated. Tensile test was carried out at two temperatures to determine mechanical behavior. Results show that there is a little difference at all observed material characteristics in comparison with non-modified PA6. According to the results it was proven th
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Moreno, Diego David Pinzón, and Clodoaldo Saron. "Influence of compatibilizer on the properties of low-density polyethylene/polyamide 6 blends obtained by mechanical recycling of multilayer film waste." Waste Management & Research: The Journal for a Sustainable Circular Economy 36, no. 8 (2018): 729–36. http://dx.doi.org/10.1177/0734242x18777795.

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Polymeric wastes have caused increasing environmental problems, mainly in oceans that accumulate large amounts of non-degradable plastic waste. Particularly, waste of polymeric multilayer films for packaging presents low interest for mechanical recycling due to the poor properties and low commercial value of the recycled material generated as polymeric blends. Multilayer films of low-density polyethylene (LDPE) and polyamide 6 (PA6) is a typical material used for packaging applications. The aim of this study was to evaluate the action of the concentration of maleic anhydride grafted polyethyle
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Oro, Carolina E. Demaman, Bruna M. Saorin Puton, Luciana D. Venquiaruto, Rogério Marcos Dallago, and Marcus V. Tres. "Immobilization of Enzymes in Polymeric Materials Based on Polyamide: A Review." Processes 13, no. 1 (2025): 200. https://doi.org/10.3390/pr13010200.

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The immobilization of enzymes in polyamide-based polymeric materials through covalent bonding is an established technique to stabilize and reuse biocatalysts in industrial processes. Traditionally, enzymes are immobilized using crosslinking agents that activate functional groups on both the support and the enzyme, creating strong bonds that securely anchor the enzyme to the surface. While effective for maintaining enzyme activity over multiple cycles, this method can reduce catalytic efficiency due to rigid binding and involves complex activation steps. Recently, in situ immobilization approac
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Lopes, Lucas, Harish Daruari, Fernando M. Duarte, Manuela Almeida, and Paulo Mendonca. "Circular Materials from the Ocean Waste: Prototyping Additive Manufacturing Processes for 3D Printing with Regenerated Plastics." Key Engineering Materials 1003 (December 20, 2024): 57–65. https://doi.org/10.4028/p-0rgpmb.

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Marine plastic waste, such as High-Density Polyethene (HDPE) and Polyamide, poses a significant threat to marine ecosystems globally due to the incredibly large quantities found around the world. Each year, a minimum of eight million tons of plastic escapes into the oceans, contributing to a staggering 150 million tons of plastic waste currently present in the marine environment . If no substantial measures are taken, it is estimated that by 2050, the weight of plastic in the oceans may surpass that of fish, highlighting the critical need for intervention . Fishing lines and mooring cables are
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Prystynskyii, Serhii, Yurii Budash, Viktoriia Plavan, and Roman Shuliak. "THE INFLUENCE OFTHEMAIN TECHNOLOGICALPARAMETERS ON THE STABILITYOF INJECTION MOLDING PROCESS OF MULTICOMPONENT WASTE POLYMER COMPOSITIONS." Technical Sciences and Technologies, no. 4(30) (2022): 148–57. http://dx.doi.org/10.25140/2411-5363-2022-4(30)-148-157.

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In the work, a comparative analysis of the main technological parameters, as well as the stability of the injection molding process of the primary glass-filled (30%) polyamide 6 and the secondary composition of the mixture of glass-filled polyamide 6/polycarbonate was carried out.Non-standard multi-component car parts obtained on the hybrid casting machine "ENGEL" were used as the starting ma-terial. The black element of the part is cast from glass-filled polyamide (PA6GF30), the white element -from polycarbonate (PC). Grinding of parts was carried out by a mechanical method on a "Rapid 200" s
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Watt, Ethan, Mohamed A. Abdelwahab, Amar K. Mohanty, and Manjusri Misra. "Biocomposites from biobased polyamide 4,10 and waste corn cob based biocarbon." Composites Part A: Applied Science and Manufacturing 145 (June 2021): 106340. http://dx.doi.org/10.1016/j.compositesa.2021.106340.

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Alotaibi, N. F., M. A. Alsolami, Shaima M. N. Moustafa, Nawaf Bin Darwish, and A. M. Nassar. "A Novel Antifouling RO Polyamide/Myrrh Membrane for Waste Water Purification." Adsorption Science & Technology 2022 (August 28, 2022): 1–10. http://dx.doi.org/10.1155/2022/8415434.

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In the present work, desalination of real samples from Dumat Al-Jandal Lake water (located in Jouf region) was carried out via reverse osmosis (RO) technique. The growth of bacteria on the surface of RO membrane is an essential issue of this method. It creates defects in membrane properties as salt rejection and preparation. Many approaches have been proposed to prevent the growth of bacteria on membrane. The addition of some materials such as natural products was one of those approaches. In this work, myrrh was chosen because it is well known as an antibacterial natural product. Unmodified RO
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Rietzler, Barbara, Avinash P. Manian, Dorian Rhomberg, Thomas Bechtold, and Tung Pham. "Investigation of the decomplexation of polyamide/ CaCl 2 complex toward a green, nondestructive recovery of polyamide from textile waste." Journal of Applied Polymer Science 138, no. 40 (2021): 51170. http://dx.doi.org/10.1002/app.51170.

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Sezgin, Hande, Ipek Yalçın Eniş, and Hıdır Maral. "Evaluation of Thermal Insulation and Air Permeability of Needle-Punched Nonwovens Recycled from Waste Pantyhose." Key Engineering Materials 1003 (December 20, 2024): 81–86. https://doi.org/10.4028/p-urn9pz.

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Waste amount in the textile industry is rising in tandem with rising production and consumption levels. Reusing waste is always the best option, but for some textile products, this isn't the case. A ruptured pair of pantyhose is among the one of the best examples. Due to their delicate structure, these products are easily punctured, so they are disposed of in solid waste sites after 2-3 times use. In this study, it is aimed to recycle these pantyhose waste (polyamide/elastane), and use it in the production of thermal panels, and to statistically examine the effects of varying thickness and ela
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Czarnecka-Komorowska, Dorota, Jagoda Nowak-Grzebyta, Katarzyna Gawdzińska, Olga Mysiukiewicz, and Małgorzata Tomasik. "Polyethylene/Polyamide Blends Made of Waste with Compatibilizer: Processing, Morphology, Rheological and Thermo-Mechanical Behavior." Polymers 13, no. 14 (2021): 2385. http://dx.doi.org/10.3390/polym13142385.

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The aim of this study was to develop a polyethylene/polyamide (R-PE/R-PA) regranulated product made from post-consumer wastes grafted with polyethylene-graft-maleic anhydride (PE-g-MAH) by reactive extrusion in a twin-screw extruder equipped with an external mixing zone. The compatibility effect of PE-g-MAH used as a modifier in R-PE/R-PA blends was evaluated by means of differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA), while the analysis of the chemical structure of this blend was carried out by Fourier transform infrared spectroscopy (FT-IR). The thermal
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M S, Darshan, K. Siddaraju, and P. Mahadesh. "Textural characteristics and abundance of microplastics in the Nethravati river estuary sediments, south-west Mangalore beach, India." Indian Association of Sedimentologists 40, no. I (2023): 29–42. http://dx.doi.org/10.51710/jias.v40ii.285.

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Microplastics commonly enter the world's sea through rivers and estuaries. Yet somehow, very little is known about what happens to plastic waste in estuaries. This study provides important information on the Microplastics (MP's) distribution and features in the Nethravati estuary. The present level of knowledge on microplastic trash dispersal in estuaries and their intertidal ecosystems. The MPs identified in this were classified as: source (Primary and secondary MPs), size < 1000 ?m (78%), followed by >1000 ?m (22%), color (coloured plastic (32%) and white plastic (68%), shape (fibre (9
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Garabito, J., Lourdes Alameda, Jesús Gadea, and Sara Gutiérrez-González. "Influence of Superplasticizers on the Properties of Lightweight Mortar Plaster Made with Recycled Polymers." Advanced Materials Research 1129 (November 2015): 546–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.546.

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The advantageous influence of two different polycarboxylate and melamine superplasticizers is studied in relation to the properties of blended mortar plaster made with recycled polymers (polyamide powder and polyurethane foam). The characteristics of the test specimens are defined and tested in both a fresh and a hardened state. The influence of the additives on the microstructure of the lightweight mortar plaster is defined through an analysis of the compatibility of the interface zone of the materials using Fast Scanning Electron Microscopy (FSEM).Our results show that the addition of additi
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Hang, Le Thuy, Quoc-Viet Do, Luu Hoang, Luc The Nguyen, Nguyen Pham Duy Linh, and Vu Anh Doan. "Mechanical Properties of Ternary Composite from Waste Leather Fibers and Waste Polyamide Fibers with Acrylonitrile-Butadiene Rubber." Polymers 15, no. 11 (2023): 2453. http://dx.doi.org/10.3390/polym15112453.

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This study aimed to improve the mechanical properties of a composite material consisting of waste leather fibers (LF) and nitrile rubber (NBR) by partially replacing LF with waste polyamide fibers (PA). A ternary recycled composite NBR/LF/PA was produced by a simple mixing method and vulcanized by compression molding. The mechanical properties and dynamic mechanical properties of the composite were investigated in detail. The results showed that the mechanical properties of NBR/LF/PA increased with an increase in the PA ratio. The highest tensile strength value of NBR/LF/PA was found to have i
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TAŞDEMİR, Münir, Dilara KOÇAK, and Nigar MERDAN. "Recycled Polyamide-6/Waste Silk Cotton Fibre Polymer Composites:Effect of Fibre length." MARMARA UNIVERSITY JOURNAL OF SCIENCE 4, no. 25 (2013): 157. http://dx.doi.org/10.7240/mjs.2013254094.

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Jeziórska, R. "Maleic anhydride grafted LLDPE modified polyamide and fabrics waste containing PET blends." Pigment & Resin Technology 35, no. 1 (2006): 3–11. http://dx.doi.org/10.1108/03699420610637996.

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Shakhnazarli, R. Z., N. Ya Ishchenko, Kh G. Nazaraliev, B. A. Mamedov, and A. M. Guliev. "Surface Modification of Waste Polyamide Fibre and Its Use in Bitumen Composites." International Polymer Science and Technology 39, no. 2 (2012): 53–55. http://dx.doi.org/10.1177/0307174x1203900211.

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Shakhnazarli, R. Z., N. Ya Ishchenko, Kh G. Nazaraliev, B. A. Mamedov, and A. M. Guliev. "Polymer-bitumen compounds with crumb rubber, secondary polyethylene, and polyamide fiber waste." Russian Journal of Applied Chemistry 82, no. 7 (2009): 1310–13. http://dx.doi.org/10.1134/s1070427209070283.

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