Results 111 to 120 of about 18,640 (151)

Investigation of some recycled oils as fluids for polyurea greases

Petroleum Science and Technology, 2019
The aim of this study is to explore the effect of three types of recycled oils on the preparation of three types of Polyurea greases.
Modather F Hussein, Bassem M Raafat, Ashraf Y El-Naggar   +2 more
exaly   +2 more sources

Effect of preparation process on elevated temperature tribological properties of composite polyurea grease

Industrial Lubrication and Tribology, 2016
Purpose This paper aims to investigate and prepare the composite polyurea greases with excellent thermal stability and tribological properties. Design/methodology/approach In this paper, composite Ba-based (Ba, barium) tetra-polyurea lubricating greases were prepared with two different methods: mixing Ba-based gelatinizer and tetra-polyurea ...
Xinxin Fan
exaly   +2 more sources

Investigating the rheological and tribological properties of polyurea grease via regulating ureido amount

Tribology International, 2022
Xiaoqiang Fan, Changjiang Zhou
exaly   +2 more sources

Friction and Wear Behaviour of Laser-Textured Surfaces under the Lubrication of Polyurea Grease Containing Various Additives

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2011
The friction and wear behaviour of the laser-textured surfaces sliding against a pin under the lubrication of the polyurea grease containing various additives were investigated using an UMT-2MT reciprocating friction tester. Results show that the dimple
Zeyun Wang, Yanqiu Xia, Tianchang Hu
exaly   +2 more sources

Microscopy of Polyurea Grease

Microscopy and Microanalysis, 2020
Abstract
Matthew A, Thorseth, Joseph D, Harris, Junsi, Gu, John, Cuthbert, Lauren, Huffman, Kevin, Capaldo, Zhe, Jia   +6 more
openaire   +2 more sources

Rheological and tribological properties of polyurea greases containing additives of MoDDP and PB

Tribology International, 2023
Xudong Gao
exaly   +2 more sources

A study of greases based on polyureas

Journal of Synthetic Lubrication, 1991
AbstractThis paper illustrates the thickening effects of diureas and tetraureas formed from monoamines, diamines and diisocyanates on the mineral oils of different viscosity, and on the esters and polysiloxanes of different structures. It also reviews the properties and applications of such greases based on polyureas.
Xie Liangsen, Li Hui
openaire   +1 more source

The influence of mechanical shearing on the thickener microstructure and properties of Polyurea greases

Tribology International
Wenhui Cao, Litian Hu, Peng Ding
exaly   +2 more sources

Properties of polyurea greases on a synthetic base

Chemistry and Technology of Fuels and Oils, 2004
The dependence of the properties of polyurea greases on the composition of the dispersion medium was investigated. Synthetic lubricating fluids of different chemical natures and mixtures of these fluids were used as the dispersion medium. Lubricants on a mixed base have better lubricant properties than lubricants based on the individual synthetic ...
L. I. Borisenko, Yu. L. Ishchuk
openaire   +1 more source

The Influence of Molecular Weight of Polyisobutylenes on Tribological Properties of Polyurea Greases

Tyumen 2021, 2021
Summary The purpose of this work was to investigate the effect of a thickening polymer additive - polyisobutylene - on tribological properties of polyurea greases. Biocoal in concentration of 5,10,15 mas. % was added to the obtained lubricant samples. The following were analyzed: dropping point (GOST 32394-2013), penetration (GOST 32331-2013), colloid ...
D.I Daudi, A.Y Kilyakova
openaire   +1 more source