Basic Study of Grease Rheology and Correlation with Grease Properties

Comprehensive interpretations of grease properties are presented. Dropping point, penetration and rheological properties are examined for a wide variety of greases involving both lithium soap greases and diurea greases. Types and viscosity of the base oils, types and content of the thickeners and ma...

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Autores principales:	Yoshiyuki Suetsugu, Hiroki Sekiguchi, Yusuke Nakanishi, Yukitoshi Fujinami, Takuya Ohno
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2013
Materias:	lithium soap diurea rheology thickener network dropping point penetration Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/d7e3a0d2849341799828e2140cb8c78c
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spelling	oai:doaj.org-article:d7e3a0d2849341799828e2140cb8c78c2021-11-05T09:24:31ZBasic Study of Grease Rheology and Correlation with Grease Properties1881-219810.2474/trol.8.83https://doaj.org/article/d7e3a0d2849341799828e2140cb8c78c2013-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/8/1/8_83/_pdf/-char/enhttps://doaj.org/toc/1881-2198Comprehensive interpretations of grease properties are presented. Dropping point, penetration and rheological properties are examined for a wide variety of greases involving both lithium soap greases and diurea greases. Types and viscosity of the base oils, types and content of the thickeners and manufacturing conditions are extensively varied in the greases examined. Grease exhibits the rubbery region over a wide range of frequency, indicating the network structure formed by thickener fibers. The magnitude of storage modulus, G', in the region is related to the network density of the thickener fiber in analogous to polymer rheology. Two regions are found in the dropping point of grease. In the Region A, dropping point decreases as the network density decreases. In the Region B, the dropping point is almost independent of the network density, but dominated by network collapse. Moreover, the loss modulus, G'', at non-linear regime, representing viscous dissipation of energy, is found to be a controlling factor for the penetration, and it allows for excellent correlation with the extensive body of penetration data.Yoshiyuki SuetsuguHiroki SekiguchiYusuke NakanishiYukitoshi FujinamiTakuya OhnoJapanese Society of Tribologistsarticlelithium soapdiurearheologythickenernetworkdropping pointpenetrationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 8, Iss 1, Pp 83-89 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	lithium soap diurea rheology thickener network dropping point penetration Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	lithium soap diurea rheology thickener network dropping point penetration Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Yoshiyuki Suetsugu Hiroki Sekiguchi Yusuke Nakanishi Yukitoshi Fujinami Takuya Ohno Basic Study of Grease Rheology and Correlation with Grease Properties
description	Comprehensive interpretations of grease properties are presented. Dropping point, penetration and rheological properties are examined for a wide variety of greases involving both lithium soap greases and diurea greases. Types and viscosity of the base oils, types and content of the thickeners and manufacturing conditions are extensively varied in the greases examined. Grease exhibits the rubbery region over a wide range of frequency, indicating the network structure formed by thickener fibers. The magnitude of storage modulus, G', in the region is related to the network density of the thickener fiber in analogous to polymer rheology. Two regions are found in the dropping point of grease. In the Region A, dropping point decreases as the network density decreases. In the Region B, the dropping point is almost independent of the network density, but dominated by network collapse. Moreover, the loss modulus, G'', at non-linear regime, representing viscous dissipation of energy, is found to be a controlling factor for the penetration, and it allows for excellent correlation with the extensive body of penetration data.
format	article
author	Yoshiyuki Suetsugu Hiroki Sekiguchi Yusuke Nakanishi Yukitoshi Fujinami Takuya Ohno
author_facet	Yoshiyuki Suetsugu Hiroki Sekiguchi Yusuke Nakanishi Yukitoshi Fujinami Takuya Ohno
author_sort	Yoshiyuki Suetsugu
title	Basic Study of Grease Rheology and Correlation with Grease Properties
title_short	Basic Study of Grease Rheology and Correlation with Grease Properties
title_full	Basic Study of Grease Rheology and Correlation with Grease Properties
title_fullStr	Basic Study of Grease Rheology and Correlation with Grease Properties
title_full_unstemmed	Basic Study of Grease Rheology and Correlation with Grease Properties
title_sort	basic study of grease rheology and correlation with grease properties
publisher	Japanese Society of Tribologists
publishDate	2013
url	https://doaj.org/article/d7e3a0d2849341799828e2140cb8c78c
work_keys_str_mv	AT yoshiyukisuetsugu basicstudyofgreaserheologyandcorrelationwithgreaseproperties AT hirokisekiguchi basicstudyofgreaserheologyandcorrelationwithgreaseproperties AT yusukenakanishi basicstudyofgreaserheologyandcorrelationwithgreaseproperties AT yukitoshifujinami basicstudyofgreaserheologyandcorrelationwithgreaseproperties AT takuyaohno basicstudyofgreaserheologyandcorrelationwithgreaseproperties
_version_	1718444379334508544

Basic Study of Grease Rheology and Correlation with Grease Properties

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