Effect of Thickener Nature on Properties of Polyurealubricant Compositions Based on Esters

Autor:	O. V. Popova, Ravilya Z. Safieva, Vladimir A. Vinokurov, S. N. Gorbacheva, N. D. Stenina, S. O. Il’in, B. P. Tonkonogov, A. Yu. Kilyakova
Rok vydání:	2020
Předmět:	Chemistry General Chemical Engineering Drop (liquid) Energy Engineering and Power Technology 02 engineering and technology General Chemistry Penetration (firestop) Tribology 01 natural sciences 010406 physical chemistry 0104 chemical sciences Nanocellulose chemistry.chemical_compound Fuel Technology 020401 chemical engineering Chemical engineering Rheology Urea 0204 chemical engineering Lubricant Polyurea
Zdroj:	Chemistry and Technology of Fuels and Oils. 55:689-696
ISSN:	1573-8310 0009-3092
DOI:	10.1007/s10553-020-01083-0
Popis:	Polyurea lubricant composition with conditionally two and four urea units per polyurea thickener molecule in the presence of a second biodegradable thickener (nanocellulose, cetearyl alcohol) were synthesized. The drop point, penetration, and oil separation and rheological, tribological, and antiwear properties were evaluated. The lubricant composition properties changed depending on the number of urea units per polyurea molecule and content of second biodegradable thickener. Tetraurea-based greases had lower viscosity and better tribological and antiwear properties regardless of the nanocellulose content, confirming that the urea-thickener structure had a decisive influence on the lubricant-composition properties.
Databáze:	OpenAIRE
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