Chemical Structure Bases for Oxidation Stability of Neutral Base Oils

1987 ◽  
Vol 30 (2) ◽  
pp. 261-268 ◽  
Author(s):  
H. H. Abou El Naga ◽  
M. A. Abdel Ghany
Keyword(s):  
Chemical Structure ◽  
Oxidation Stability ◽  
Base Oils ◽  
Neutral Base

scholarly journals Effect of Chemical Structure and Degree of Branching on the Stability of Proton Exchange Membranes Based on Sulfonated Polynaphthylimides

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 652
Author(s):  
Chunmei Gao ◽  
Jiale Chen ◽  
Boping Zhang ◽  
Lei Wang
Keyword(s):  
Oxidative Stability ◽  
Chemical Structure ◽  
Hydrolytic Stability ◽  
Oxidation Stability ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Ether Linkage ◽  
Degree Of Branching ◽  
The Core ◽  
The Stability

Hydrolytic stability and oxidative stability are the core properties of sulfonated polynaphthylimides (SPIs) as proton exchange membranes. The chemical structure of SPIs directly influences the performance. Herein, three different series of branched SPIs were designed and prepared using 1,3,5-tris (2-trifluoromethyl-4-aminophenoxy) benzene as a trifunctional monomer and three non-sulfonated diamine monomers, such as 4,4′-oxydianiline (ODA), 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (6FODA), and 4,4′-(9-fluorenylidene)dianiline (BFDA). The effect of the chemical structure and degree of branching on SPIs properties is discussed. The results showed that by controlling the chemical structure and degree of branching, the chemical stability of SPIs changed significantly. SPI-6FODA with two ether linkages and a hydrophobic CF3 group has higher hydrolytic stability than SPI-ODA with only one ether linkage. In addition, with the increase of the introduced B3 monomer, the oxidation stability of SPI-6FODA has been greatly improved. We successfully synthesized SPIs with a high hydrolytic stability and oxidative stability.

Study on the Effect of Hydrogenated Lubricant Base Oil Composition to Its Oxidation Stability

2005 ◽  
Author(s):  
Xiao Li Hu ◽  
Hui Dong Wang
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Stability ◽  
Engine Oil ◽  
Oil Composition ◽  
Temperature Oxidation ◽  
Base Oil ◽  
Base Oils ◽  
Thermo Stability ◽  
Model Oil

In this paper, we studied the high temperature oxidation stability of hydrogenated lubricant base oils used in automobile engine oil formations. Different oil from Daqing, Lanzhou and Kelamayi were investigated, and a hydro-isomerised poly alpha olefin oil PAO-6 produced by Mobile company was used as model oil. The influence of aromatic hydrocarbon, sulfur and nitrogen content of the base oils to their oxidation stability was investigated. The result indicated that, the high temperature oxidation stability of all these base oil was not good, but their thermo-stability was very good.

Sign in / Sign up

Export Citation Format

Share Document