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Journal articles on the topic 'Polypropylene expansé'

Author: Grafiati

Published: 15 June 2024

Last updated: 31 July 2025

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1

Gulieva, T. M. "COPPER-CONTAINING NANOCOMPOSITES ON THE BASIS OF ISOTACTIC POLYPROPYLENE AND BUTADIENE-NITRILE RUBBER." Azerbaijan Chemical Journal, no. 3 (September 28, 2021): 38–43. http://dx.doi.org/10.32737/0005-2531-2021-3-38-43.

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The influence of additives of nanofillers containing nanoparticles of copper oxides stabilized by a polymer matrix of maleinized high-pressure polyethylene obtained by the mechano-chemical method on the structure and properties features of metal-containing nanocomposites based on isotactic polypropylene and butadiene-nitrile rubber by x-ray phase and differential thermal analyses is studied. The improvement of strength, deformation and rheological parameters, as well as thermal-oxidative stability of the obtained nanocomposites was revealed, that is probably due to the synergistic effect of in

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2

YANOV, V. V., L. I. GATAULLINA, and L. A. ZENITOVA. "HEVEA-PRODUCTS AND POLYPROPYLENE." Herald of Technological University 27, no. 11 (2024): 56–62. https://doi.org/10.55421/1998-7072_2024_27_11_56.

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The main source of natural rubber is hevea, a genus of evergreen monoecious rubber-bearing trees. Natural rubber belongs to biodegradable polymers and does not accumulate in nature. In this regard, it can be used as a biodegradable additive for polypropylene, which is not biodegradable. Most studies are devoted to the biodegradation of either purified natural rubber or tire samples made of purified natural rubber, but there are few publications on the biodegradation of unrefined natural rubber. During its purification, the protein-lipid layer contained on the surface of rubber globules is larg

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3

Mr.Pravin, Shankarsing Pardeshi*1 &. Dr. Sanjay Kulkarni2. "EFFECT OF POLYPROPYLENE ON SHEAR STRENGTH PARAMETERS." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES 5, no. 7 (2018): 452–57. https://doi.org/10.5281/zenodo.1323164.

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In this research the shear strength parameter of Highly cohesive soil is discussed. A Comparison of shear strength parameters and ultimate bearing capacity by direct shear test at various water content is calculated. Most of the engineering design methods and parameters of structure on soil have been developed for ideal soil, such as expansive clay which mostly deviates from the reality by atmospheric changes. Black Cotton soil is collected from Nadhenagarnear Kalewadi, Pune  which are one of the expands during the rainy seasons and shrinks during the summer seasons. In this paper the she

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4

Liu, Changkun, Jizhen Jia, Ji’an Liu, and Xiaoyan Liang. "Hg selective adsorption on polypropylene-based hollow fiber grafted with polyacrylamide." Adsorption Science & Technology 36, no. 1-2 (2017): 287–99. http://dx.doi.org/10.1177/0263617416689480.

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A novel polypropylene hollow fiber membrane with a new function of selective adsorption of mercury ions in aqueous solutions was successfully prepared. The surface of the polypropylene hollow fiber membrane was initially modified with polydopamine by surface polymerization, and subsequently grafted with polyacrylamide (PAM) polymer brush via the surface initiated atom transfer radical polymerization (SI-ATRP) technique (thereafter named as PP-PAM). This study investigated the adsorption performance of Hg(II) ions by PP-PAM and the effect of various influencing factors on Hg(II) ion adsorption.

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5

Potapova, Ekaterina, Ekaterina Dmitrieva, Aung Kyaw Nian, and Elena Tsvetkova. "Gypsum Composite Reinforced with Polymer Fibers." Key Engineering Materials 910 (February 15, 2022): 880–86. http://dx.doi.org/10.4028/p-dgyem5.

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Composite gypsum binders harden quickly, gain strength quickly and have positive environmental properties. Moreover, they are characterized by increased moisture resistance, which significantly expands the field of application of such gypsum materials. Dispersed reinforcement of composite gypsum binders with polypropylene fibers makes it possible to obtain composites characterized by high performance properties. On basis of developed compositions of gypsum-cement-pozzolanic and composite gypsum binders with polymer fibers, gypsum composites have been created, characterized by increased strengt

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6

Barczewski, Mateusz, Danuta Matykiewicz, Olga Mysiukiewicz, and Paweł Maciejewski. "Evaluation of polypropylene hybrid composites containing glass fiber and basalt powder." Journal of Polymer Engineering 38, no. 3 (2018): 281–89. http://dx.doi.org/10.1515/polyeng-2017-0019.

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AbstractPolypropylene composites filled with inorganic fillers are widely used due to their good mechanical and thermal properties. The modification efficiency of filler incorporated into thermoplastic polymer strongly depends on its shape and dimension. Therefore, the development of novel hybrid composites modified with particle and fibrous shaped fillers expands the range of thermoplastic composite applications. This work investigates the influence of glass fiber and basalt powder and their shape on the mechanical properties of polypropylene-based composites. Mechanical properties of hybrid

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7

Kurbanova, N. I., S. K. Ragimova, N. A. Alimirzoeva, N. Ya Ishenko, and V. V. Medyakov. "Composites based on isotactic polypropylene and high-pressure polyethylene with zink-containing nanofillers." Perspektivnye Materialy 11 (2021): 47–53. http://dx.doi.org/10.30791/1028-978x-2021-11-47-53.

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The effect of nanofiller (NF) additives containing zink oxide nanoparticles stabilized by a polymer matrix of high pressure polyethylene obtained by the mechanochemical method on the structure and properties of metal-containing nanocomposites based on isotactic polypropylene (PP) and high pressure polyethylene (PE) using differential thermal (DTA) and X-ray phase (XRF) analyzes. The improvement of strength, deformation and rheological parameters, as well as thermal-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is associated with the synergistic effect of i

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8

Kurbanova, N. I., S. K. Ragimova, and T. M. Guliyeva. "Composites based on isotactic polypropylene and high pressure polyethylene with nichel-containing nanofillers." Perspektivnye Materialy 2 (2024): 51–57. http://dx.doi.org/10.30791/1028-978x-2024-2-51-57.

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The effect of nanofiller (NF) additives containing nickel oxide nanoparticles stabilized by a polymer matrix of high pressure polyethylene (PE) obtained by the mechanochemical method on the structure and properties of metal-containing nanocomposites based on isotactic polypropylene (PP) and high pressure polyethylene(PE) using differential thermal (DTA) and X-ray phase (XRF) and SEM analyzes. The improvement of strength, deformation and rheological parameters, as well as thermal-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is associated with the synergist

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9

Kurbanova, N. I., T. M. Gulieva, and N. Ya Ischenko. "Properties of nanocomposites based on isotactic polypropylene and high-pressure polyethylene with metal-containing nanofillers." Perspektivnye Materialy, no. 9 (2020): 59–64. http://dx.doi.org/10.30791/1028-978x-2020-9-59-64.

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The effect of additives of nanofillers (NF) containing nanoparticles (NP) of copper oxide, stabilized by a polymer matrix of maleized polyethylene (MPE), obtained by the mechanochemical method, on the properties of composites based on isotactic polypropylene (PP) and high-pressure polyethylene (PE) was studied by X-ray phase (XRD) and thermogravimetric (TGA) analyzes. The enhancement of strength, deformation, and rheological parameters, as well as the thermo-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is due to the synergistic effect of the interaction o

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10

Kurbanova, N. I., S. K. Ragimova, N. A. Alimirzoeva, and N. Ya Ishenko. "Copper-containing nanocomposites on the basis of isotactic polypropylene and butadiene-nitrile rubber." Perspektivnye Materialy 5 (2021): 76–81. http://dx.doi.org/10.30791/1028-978x-2021-5-76-81.

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The influence of additives of nanofillers (NF) containing nanoparticles of copper oxides stabilized by a polymer matrix of high-pressure polyethylene (PE) obtained by the mechanochemical method on the structure and properties features of metal-containing nanocomposites based on isotactic polypropylene (PP) and butadiene-nitrile rubber (BNK) is studied by X-ray phase (XRD) and differential thermal analyses(DTA). The improvement of strength, deformation and rheological parameters, as well as thermal-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is associated

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11

Du, Guoqiang, and Jie Zhang. "Capacitance Evaluation of Metallized Polypropylene Film Capacitors Considering Cumulative Self-Healing Damage." Electronics 13, no. 14 (2024): 2886. http://dx.doi.org/10.3390/electronics13142886.

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Self-healing (SH) in metallized polypropylene film capacitors (MPPFCs) can lead to irreversible damage to electrode and dielectric structures, resulting in capacitance loss and significant stability degradation, especially under cumulative SH conditions. To enhance the reliability assessment of MPPFCs post-SH, this study conducted SH experiments on MPPFCs, examined the damage patterns of the electrodes and dielectric films, and proposed a novel capacitance evaluation method for MPPFCs under cumulative SH conditions. The results reveal that with increasing SH voltage, the number of dielectric l

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12

MOODLEY, R. S., R. GOVINDEN, and B. ODHAV. "The Effect of Modified Atmospheres and Packaging on Patulin Production in Apples." Journal of Food Protection 65, no. 5 (2002): 867–71. http://dx.doi.org/10.4315/0362-028x-65.5.867.

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This study was undertaken to determine the effectiveness of modified atmospheres and packaging materials on the growth of Penicillium expansum and patulin production in apples. Granny Smith apples were surface sterilized with 76% ethanol and inoculated with 0.1 ml of a 1.1 × 107 spore/ml P. expansum spore suspension. The apples were packaged either in polyethylene (PE) or polypropylene (PP) and treated with three different gas combinations, viz., 58% CO2/42% N2, 48% CO2/52% N2, and 88% CO2/12% N2, and were then incubated for 14 days at 25°C. Fungal growth was monitored every 2 to 4 days by mea

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13

T.M., Guliyeva, Kurbanova N.I., Mamedov B.A., and Nurullayeva D.R. "Metal-Containing Nanocomposites on the Basis of Isotactic Polypropylene and Butadiene-Nitrile Rubber." International Journal of Engineering Research & Science 7, no. 3 (2021): 11–15. https://doi.org/10.5281/zenodo.4647611.

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<strong>Abstract</strong><strong>—</strong> One and two-step methods for the synthesis of saccharin-6-carboxylic acid triglyceride were studied. The reesterification reactions of 2-hydroxypropyl-1,3-bis-ethersulfoimide of this acid and glycerol with some aliphatic saccharin-6-carboxylic acid esters were carried out. The resulting products are characterized by elemental analysis and IR spectroscopy and size exclusion chromatography. It was found that when using a two-step method, the end product is obtained with the highest yield (85%). The influence of additions of nanofillers (NF) conta

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14

Levin, R. E., M. A. Shamraeva, I. M. Larina, et al. "THE DEVELOPMENT OF A METHOD FOR DIRECT MASS SPECTROMETRIC ANALYSIS OF BIOLOGICAL SAMPLES USING POROUS SAMPLERS." Aerospace and Environmental Medicine 55, no. 1 (2021): 99–103. http://dx.doi.org/10.21687/0233-528x-2021-55-1-99-103.

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The paper presents a method for rapid multi-omics investigation of biological samples using polypropylene bulk porous samplers. The use of porous samplers makes it easy to collect samples from the surface of the skin, mucous membranes, and biological fluids even in a field, and the surfaces of wounds and injuries. Collected samples do not require special storage conditions, and the samplers are lightweight and very compact. They can be used to monitor the condition of cosmonauts before, during, and after the spaceflight with the same sample collection method. The analysis of biomaterial applie

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15

Kovaleva, I. A., I. V. Bazuyev, Yu V. Prybytkov, and N. A. Khodosovskaya. "Ensuring the safety of the surface of calibrated rolled products in the conditions of small-grade wire mill 370/150 OJSC «BSW – Management Company of the Holding «BMC»." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (January 20, 2020): 53–57. http://dx.doi.org/10.21122/1683-6065-2019-4-53-57.

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One of the important tasks is to deliver to the consumer a calibrated high-quality metal in a saleable condition, which requires protection from atmospheric corrosion and adverse climatic factors, protection from contamination and mechanical damage for the period of transportation to the consumer by motor transport, and storage at intermediate warehouses before going into production. A comprehensive system approach is needed to preserve the quality and appearance of the products on the way from the manufacturer to the consumer. The use of modern packaging materials, such as paper with corrosio

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16

Oh, Moo-Hwan, Taeho Kim, David W. Fredriksson, and Judson DeCew. "Structural Analysis of a Subsurface Cage for Sea Cucumber, Stichopus japonicus, Grow-out Using Numerical Modeling Techniques." Marine Technology Society Journal 46, no. 5 (2012): 55–66. http://dx.doi.org/10.4031/mtsj.46.5.8.

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AbstractThe structural characteristics of a subsurface cage system for sea cucumber, Stichopus japonicus, grow-out were analyzed by using numerical modeling techniques. The cage system was constructed of polypropylene pipe and netting and weighted to sit on the seafloor bottom. Inside the cage, concrete blocks were used for animal aestivation and weight and a thin-plated device was mounted for animal movement. Environmental loads on the structure, resulting from a prescribed irregular wave field with and without currents, were first determined with a Morison equation-type finite element model.

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17

Fürst, Richard, Petr Hejtmánek, Tomáš Vlach, Jakub Řepka, Vladimír Mózer, and Petr Hájek. "Experimental Evaluation of Carbon Reinforced TRC with Cement Suspension Matrix at Elevated Temperature." Polymers 14, no. 11 (2022): 2174. http://dx.doi.org/10.3390/polym14112174.

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Textile-reinforced concrete (TRC) is a new composite material comprising high-performance concrete and textile reinforcement from textile yarns with a matrix, usually consisting of epoxy resins (ER). The most significant advantage of ER is the homogenization of all filaments in the yarn and full utilization of its tensile potential. Nevertheless, ER matrix is a critical part of TRC design from the perspective of the fire resistance due to its relatively low resistance at temperatures of approximately 120 ∘C. This work expands the previously performed mechanical tests at normal temperatures wit

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18

Hu, Yanyan, and Linlin Ma. "Effect of Surface Treatment of Polypropylene (PP) Fiber on the Sulfate Corrosion Resistance of Cement Mortar." Materials 14, no. 13 (2021): 3690. http://dx.doi.org/10.3390/ma14133690.

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Sulfate erosion is one of the most complex and harmful chemical corrosion actions. Following sulfate erosion, concrete expands, cracks, dissolves, peels off, and decreases in strength, which affects the durability of structures. Polypropylene fiber (PP) is widely used in various concrete structures because of its good mechanical properties and chemical corrosion resistance. However, PP fiber has a number of shortcomings, such as a smooth surface, poor hydrophilicity, lack of active groups in the molecular chain, and agglomeration and poor dispersion in cement-based materials. These issues limi

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19

Montoya, Rosas Emily Del Valle, Cabrera Jesús Alberto Rosas, León Raúl Ernesto Rincones, and Rodríguez José Lorenzo Narváez. "Evaluación del crecimiento de Eucheuma isiforme (Rhodophyta, Gigartinales) en sistemas de cultivo suspendidos en la isla de Cubagua, Venezuela (sureste del Mar Caribe)." AquaTechnica 2, no. 2 (2020): 86–98. https://doi.org/10.5281/zenodo.5178550.

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<strong>RESUMEN | </strong>El cultivo de algas rojas constituye la más reciente expansión en la producción global de macroalgas. Las especies más cultivadas son Kappaphycus alvarezii, K. striatus y Eucheuma denticulatum, principales fuentes de materia prima para la producción de carragenina. Debido a los diferentes beneficios socioeconómicos generados por la maricultura de algas, diversos países han adoptado esta actividad como fuente alternativa de ingresos en sus comunidades costeras. Con miras a contribuir con el desarrollo de la maricultura

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20

Ozawa, Yuta, Yuuki Nishitai, Nyamjargal Ochirkhuyag, et al. "Printable Liquid Metal Electrodes for Lithium Ion Battery." ECS Meeting Abstracts MA2024-02, no. 1 (2024): 40. https://doi.org/10.1149/ma2024-02140mtgabs.

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Recent developments in the Internet of Things (IoT) technology led to research on flexible devices for next-generation wearable devices.[1,2] As devices advance, the Lithium ion batteries (LIBs) used to operate them are also being actively researched to make them flexible. The battery electrode contains a reaction layer and a current collector layer. Flexible battery electrodes, in which these layers are integrated, are fabricated in a single process, simplifying the electrode fabrication process. However, to date, integrated electrodes have lower conductivity than conventional two-layer elect

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21

"Sumitomo to expand polypropylene capacity." Pump Industry Analyst 2007, no. 9 (2007): 3. http://dx.doi.org/10.1016/s1359-6128(07)70321-x.

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22

"Milliken expands solutions for polypropylene recyclers." Additives for Polymers 2021, no. 11 (2021): 3–4. http://dx.doi.org/10.1016/s0306-3747(21)00195-0.

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23

"LyondellBasell expands PP compounding production in China." Additives for Polymers 2024, no. 7 (2024). http://dx.doi.org/10.12968/s0306-3747(24)70829-x.

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On June 14, 2024, LyondellBasell announced the start-up of an additional production line at the Dalian site of its Advanced Polymer Solutions (APS) business, further expanding its presence in China. The new production line will produce a wide range of high-performance, high-quality polypropylene compounds, mainly supplying the automotive industry. As the second production line at the Dalian site, with an annual capacity of 20,000 tonnes, the new production line will double the site's current production capacity, enhancing the company's ability to meet the growing market demand.

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24

Gonçalves, Peterson A. de Souza, Caique de Sousa G. S. Barroso, Daniel Magalhães de Oliveira, Daniella R. Mulinari, and Luciana Ghussn. "Transforming automotive polypropylene components into 3D printing filaments." Polymer Engineering & Science, December 29, 2024. https://doi.org/10.1002/pen.27065.

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AbstractThe automotive sector plays a fundamental role in the search for solutions for the reuse, remanufacturing and recycling of materials, parts and components of vehicles produced to mitigate their environmental impacts. The automotive sector has requested to mitigate its environmental impacts through the reuse, remanufacturing, and recycling of materials, parts, and components of the vehicles produced. This work presents a proposal to reuse discarded automotive parts made of talc‐reinforced polypropylene (20 and 40% w/w) to produce filaments used for 3D printing. To produce the filament,

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25

Oluwaseun, John DADA. "Low Defect Planar Graphene Exfoliation by Sonication in Polypropylene Carbonate and 5 sec Microwaving." March 29, 2019. https://doi.org/10.5281/zenodo.2614883.

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This is an exceptional process on low cost, low defect and high-quality graphene which is produced by sonication in PPC and microwaving for just 5sec. Low energy arc-discharging process expands electrolytic graphite rods into hierarchical-like 3D- graphene retaining the basal plane carbon crystalline order and chemical purity. Sonication in Polypropylene Carbonate causes non-covalent PPC-π bonding at graphene basal plane, aligning the graphene sheets in directions that allows efficient transmission of cavitation pressures and exfoliation; while microwave treatment for 5s separates any

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26

Yu, Chuanheng, Liangdong Ye, Dacheng Li, et al. "Synergistic effect of tannic acid/stearic acid/calcium carbonate/recycled polypropylene polymer composites and molecular dynamics simulation study." Polymer Composites, January 23, 2025. https://doi.org/10.1002/pc.29545.

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AbstractDeveloping high‐toughness recycled polypropylene (REPP) composites using non‐polluting and cost‐effective methods remains a major challenge. In this study, we propose a novel modification scheme using tannic acid (TA)/stearic acid (SA) synergistically modified CC as a filler to prepare composites by blending with REPP. Characterizations, such as mechanical tests and thermodynamic tests, verified that the CC‐TA‐SA modified composites presented higher tensile and impact strengths as well as crystallinity. The tensile strength of the composites was increased from 27.44 to 30.53 MPa and si

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27

Liu, Feng, Shuhao Li, Yulei Zhao, Shakeel Akram, Li Zhang, and Zhi Fang. "Effect of pulse voltage rise rate on the polypropylene surface hydrophilic modification by ns pulsed nitrogen DBD." Plasma Science and Technology, May 13, 2023. http://dx.doi.org/10.1088/2058-6272/acd529.

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Abstract The nanosecond (ns) pulsed nitrogen dielectric barrier discharge (DBD) is employed to enhance the hydrophilicity of polypropylene (PP) surface and improve its application effect. The discharge characteristics of the ns pulsed nitrogen DBD with different pulse rise times (from 50 ns to 500 ns) are investigated by electrical and optical diagnostic methods and the discharge uniformity is quantitatively analyzed by image processing method. To characterize the surface hydrophilicity, the water contact angle (WCA) is measured, and the physical morphology and chemical composition of PP befor

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28

Wolf de Goes, Caroline Marção, Patricia Stella Pucharelli Fontanini, Lia Lorena Pimentel, and Ana Elisabete Paganelli G. de Avila Jacintho. "ANÁLISE DA APLICAÇÃO DE CONCRETO COM ADIÇÃO DE MACROFIBRAS ESTRUTURAIS SINTÉTICAS E MICROFIBRAS DE VIDRO ANTI-CRACK AR EM PISOS." REEC - Revista Eletrônica de Engenharia Civil 12, no. 1 (2016). http://dx.doi.org/10.5216/reec.v12i1.37400.

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RESUMO: As fibras vêm sendo muito utilizadas para reforçar o concreto, e hoje, existe uma grande variedade delas, por exemplo, fibras de polipropileno, fibras sintéticas, fibras com baixo teor de carbono, e fibras de polietileno. O emprego das fibras nas misturas cimentícias promove diversas melhorias ao concreto armado, como, aumento da resistência à fadiga e ao impacto; tenacidade à flexão; aumento da capacidade de absorção de energia, que transferem tensões através de fissuras, fazendo com que reduza sua propagação e expansão; e maior ductilidade, pois em concretos não reforçados, após a pr

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