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Relevant bibliographies by topics / Urea-formaldehyde oligomer

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Academic literature on the topic 'Urea-formaldehyde oligomer'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Urea-formaldehyde oligomer"

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Astakhova, Olena, Mykhailo Bratychak Jr., and Ananiy Kohut. "Initiating and Cross-Linking Properties of Urea-Formaldehyde Oligomers with Peroxide Groups." Chemistry & Chemical Technology 16, no. 3 (2022): 411–17. http://dx.doi.org/10.23939/chcht16.03.411.

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The initiating properties of urea-formaldehyde oligomers with peroxide groups have been studied. For comparison, the initiating activity has been examined for the polymerization of styrene by the peroxide oligomer based on the epoxy oligomer Epidian-5 and tert-butyl hydroperoxide. The cross-linking properties of the urea-formaldehyde oligomers with peroxide groups have been investigated using unsaturated oligoesters as a model. The chemistry of the formation of the substances with a cross-linked structure has been studied using IR spectroscopy.

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Inagamov, Sabitjan Yakubzhanovich, Feruza Azadovna Pulatova, and Gafur Israilovich Mukhamedov. "UREA FORMALDEHYDE OLIGOMERS – INHIBITORS OF POLYSACCHARIDE DESTRUCTION OF SODIUM CARBOXYMETHYL CELLULOSE, PRODUCED FROM WOOD PULP." chemistry of plant raw material, no. 1 (March 21, 2025): 95–105. https://doi.org/10.14258/jcprm.20250113181.

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The objective of this work is to study the kinetics of changes in the structure and properties of interpolymer complexes obtained on the basis of sodium carboxymethylcellulose polysaccharide (Na-CMC) with urea-formaldehyde oligomers (UFO). The stability period of solutions of Na-CMC interpolymer complexes with UFO determination of viscosity at various temperatures has been studied. Experimental data show that when storing aqueous solutions of Na-CMC, the viscosity decreases due to changes in the structure due to the rupture of polyester bonds, which leads to a decrease in the molecular weight

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Abdullayeva, I.G., and B.I. Jamalli. "PRODUCTION OF ANTI-CORROSION COATING COMPOSITIONS ON THE BASIS OF MODIFIED UREA-FORMALDEHID OLGYMERS. STUDY OF ADHESIS ABILITY OF COVER COMPOSITIONS ON THE BASIS OF MODIFIED UREA-FORMALDEHID OLIGOMERS." Annali d'Italia 32 (June 22, 2022): 45–47. https://doi.org/10.5281/zenodo.6684140.

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Urea-formaldehyde oligomer was modified with phenolomonomaleinamide in different proportions (1, 2, 3%) to form coating compositions. The adhesion and physical-mechanical properties of the prepared compositions at different temperatures were studied and compared with the properties of the composition based on the unmodified oligomer.

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Ramazanov, Bakhrom, Laylo Juraeva, and Nasiba Sharipova. "Synthesis of modified amino-aldehyde oligo (poly) mers and study of their thermal stability." IOP Conference Series: Earth and Environmental Science 839, no. 4 (2021): 042096. http://dx.doi.org/10.1088/1755-1315/839/4/042096.

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Abstract In the article are discussed the relevance of obtaining amino aldehyde oligomers and the study of their basic physicochemical properties and determines that the synthesis conditions and the ratio of the starting components play an important role on the properties and structure of the synthesized amino aldehyde oligomers. Using the Differential thermal analysis (DTA) method, it was proved that the modification of the urea-formaldehyde oligomer with acrylic acid helps to increase the thermal oxidative degradation of the resulting products. In this case, the modifier - acrylic acid stron

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Вьюнков, С. Н., and В. В. Васильев. "Study of a component of the urea-formaldehyde resin, is insoluble in water." Известия СПбЛТА, no. 233 (December 29, 2020): 199–207. http://dx.doi.org/10.21266/2079-4304.2020.233.199-207.

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Разработана методика химического анализа компонента карбамидоформальдегидной смолы (КФС), нерастворимого в воде. Синтезировали смолу при мольном соотношении исходных компонентов карбамид : формальдегид = 1 : 2, температуре 90 °С, начальной рН = 7,0…8,0, рН на кислой стадии 4,0…4,3. Для выделения водонерастворимого компонента КФС смешивали с большим количеством воды. Осадок промывали водой и растворяли в растворе йодида калия концентрацией 40%. В полученном растворе проводили окисление гидроксиметильных групп и свободного формальдегида йодом в щелочной среде. Избыток йода оттитровывали растворо

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Вьюнков, С. Н., and В. В. Васильев. "Study of a component of the urea-formaldehyde resin, is insoluble in water." Известия СПбЛТА, no. 233 (December 29, 2020): 199–207. http://dx.doi.org/10.21266/2079-4304.2020.233.199-207.

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Разработана методика химического анализа компонента карбамидоформальдегидной смолы (КФС), нерастворимого в воде. Синтезировали смолу при мольном соотношении исходных компонентов карбамид : формальдегид = 1 : 2, температуре 90 °С, начальной рН = 7,0…8,0, рН на кислой стадии 4,0…4,3. Для выделения водонерастворимого компонента КФС смешивали с большим количеством воды. Осадок промывали водой и растворяли в растворе йодида калия концентрацией 40%. В полученном растворе проводили окисление гидроксиметильных групп и свободного формальдегида йодом в щелочной среде. Избыток йода оттитровывали растворо

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Shirinov, T. T., and T. M. Naibova. "MODIFICATION OF A POLYETHYLENE AND POLYPROPYLENE BLEND WITH UREA-FUNCTIONALIZED PHENOL-FORMALDEHYDE CO-OLIGOMER." Chemical Problems 23, no. 3 (2025): 388–94. https://doi.org/10.32737/2221-8688-2025-3-388-394.

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This research presents a novel approach to addressing the challenges in recycling polyethylene and polypropylene (PE/PP) waste. Since PE and PP-based waste generally originates from the same household and industrial sources, they are often encountered as a mixture. Due to their differing physicochemical properties, separating these polymers becomes necessary prior to recycling. However, the separation and sorting of waste is a complex process, which limits the implementation of recycling. This study offers a more efficient recycling method that enables the processing of waste together without

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Chornaya, N. V., S. V. Karpova, O. A. Misyurov, and N. I. Bogdanovich. "Application of Urea-Formaldehyde Oligomer for Quality Improvment of Paper and Cardboard Products." Lesnoy Zhurnal (Forestry Journal), no. 6 (December 10, 2020): 182–93. http://dx.doi.org/10.37482/0536-1036-2020-6-182-193.

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The applicability of the developed binary system of synthetic compounds in coating paste, consisting of urea-formaldehyde oligomer (2 pts. wt. to the coating paste weight) and latex (16 pts. wt.), is found. It replaces the generally used complex of natural compounds, such as modified starch (3 pts. wt.), Na-CMC (2 pts. wt.), and casein glue (1 pts. wt.), in the presence of latex (16–32 pts. wt.). The properties of the coating paste samples met the standards, as evidenced by the viscosity according to the viscometer VZ-4 (13–17 s), the content of dry substances (50–54 %) and pH (9.0–10.5). The

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Вьюнков, С. Н., and В. В. Васильев. "Modification of the hardener of urea formaldehyde resins with a low molar ratio of formaldehyde to urea." Известия СПбЛТА, no. 243 (June 8, 2023): 284–96. http://dx.doi.org/10.21266/2079-4304.2023.243.284-296.

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Для снижения токсичности древесностружечных плит применяют карбамидоформальдегидные смолы с низким мольным соотношением формальдегида и карбамида - 1,0 и менее. Плиты на основе этих смол имеют пониженную прочность и водостойкость и увеличенное время прессования. Указанные недостатки объясняются особенностями новых смол. В молекулах олигомера формальдегид соединятся с карбамидом преимущественно метиленовыми связями и содержится малое количество гидроксиметильных групп, необходимых для отверждения смолы. Так как в смоле мало свободного формальдегида, - 0,05…0,10%, отвердитель вынужден вступать в

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Leonovich, A. A., A. V. Sheloumov, and V. G. Shpakovskii. "The study of hardening of urea-formaldehyde oligomer containing multyfunctional hardener." Russian Journal of Applied Chemistry 83, no. 3 (2010): 539–44. http://dx.doi.org/10.1134/s1070427210030316.

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Book chapters on the topic "Urea-formaldehyde oligomer"

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Papava, G., M. Gurgenishvili, I. Chitrekashvili, et al. "Synthesis Process Research of Urea– Formaldehyde Linear Oligomers when Carrying Out Polycondensation in a Solution to Obtain Biodegradable Nitrogen Fertilizers." In Environmental Technology and Sustainability. Apple Academic Press, 2024. http://dx.doi.org/10.1201/9781003397960-8.

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