Results 21 to 30 of about 808 (131)

Lube Oil Performance Enhancement Using Nano-Polymers Additives during Copolymerization Reaction

open access: yesIraqi Journal of Industrial Research, 2023
Under the parameters of normal engine operation, lubricating oil typically experience periodic shifts in its viscosity. Because of this, engine oils often include polymeric additives that are referred to as viscosity modifiers.
Mustafa M. Hathal   +3 more
doaj   +1 more source

Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields

open access: yesMolecules, 2022
As compared to China’s overall oil reserves, the reserve share of offshore oilfields is rather significant. However, offshore oilfield circumstances for enhanced oil recovery (EOR) include not just severe temperatures and salinity, but also restricted ...
Fei Yi   +14 more
doaj   +1 more source

Immobilisation of Candida rugosa lipase on a highly hydrophobic support: A stable immobilised lipase suitable for non-aqueous synthesis

open access: yesBiotechnology Reports, 2020
Lipase from Candida rugosa (CrL) was immobilised on highly hydrophobic, octadecyl methacrylate resin (Lifetech™ ECR8806M) via interfacial adsorption. The aim was to produce a stable biocatalyst suitable for use in a range of lipid-modifying reactions ...
Ivan Kurtovic   +3 more
doaj   +1 more source

One-Pot Synthesis of Organic-Sulfur-Zinc Hybrid Materials via Polycondensation of a Zinc Salt and Thiols Generated in Situ from Cyclic Dithiocarbonates

open access: yesMolecules, 2015
Soluble organic-sulfur-zinc hybrid polymers were prepared via a one-pot reaction consisting of ring-opening addition and subsequent polycondensation. The first reaction is the nucleophilic ring-opening addition of 2-ethylhexylamine to multifunctional ...
Bungo Ochiai, Hirohisa Konta
doaj   +1 more source

Structure and Properties of Hydrophobic Aggregation Hydrogel with Chemical Sensitive Switch

open access: yesInternational Journal of Polymer Science, 2017
Hydrogels with chemical sensitive switch have control release properties in special environments. A series of polyacrylamide-octadecyl methacrylate hydrogels crosslinked by N,N′-bis (acryloyl) cystamine were synthesized as potential chemical sensitive ...
Jiufang Duan, Jianxin Jiang
doaj   +1 more source

Physical and electrophoretic characterization of octadecyl methacrylate-based monolithic columns for use in capillary electrochromatography [PDF]

open access: yesJournal of the Brazilian Chemical Society, 2013
Organic monolithic columns with high efficiency were obtained for use in capillary electrochromatography (CEC) from a mixture of monomers (constant concentrations) with different proportions of porogenic solvents (1,4-butanediol with isoamyl alcohol, amyl alcohol or cyclohexanol in the presence or absence of water).
Aguiar, Valeska S., Bottoli, Carla B. G.
openaire   +3 more sources

Repeatability of Octadecyl Methacrylate-Based Monolithic Columns for Capillary Electrochromatography

open access: yesInstrumentation Science & Technology, 2015
Octadecyl methacrylate-based monolithic capillary columns were prepared using octadecyl methacrylate as the monomer, ethylene dimethacrylate as the cross-linking agent, 2-acryloylamido-2-methylpropanesulfonic acid as the ionizable monomer, responsible for a negatively charged stationary phase surface and able to support a cathodic electrosmotic flow ...
Soares Aguiar, Valeska   +1 more
openaire   +1 more source

"Emulsion polymerization of styrene and methyl methacrylate regulated by amine oxide system"

open access: yesHecheng xiangjiao gongye
Octadecylamine plyoxyethylene ether(5) oxide was employed as a regulator in emulsion polymerization of styrene and methyl methacrylate. The polymerization characteristics under different pH value conditions were investigated. The molecular weight and its
L■ Xiaojun1, BU Yuxuan2, ZHAO Qingbo1, ZHAO Hongfu1, SHEN Kaihua2
doaj   +1 more source

A Modified Acrylic Binder Used for the Graphite Negative Electrode in LithiumIon Batteries

open access: yesBatteries
The water-based binder has the advantages of non-toxic, non-flammable, small odor, and no pollution to the environment. However, there are problems such as low bond strength and poor battery cycle life of commonly used binders on the market.
Lianxiang Feng   +8 more
doaj   +1 more source

Preparation and retention performance of crosslinked and hydrophobically associating cationic polyacrylamide [PDF]

open access: yesBioResources, 2012
“Water-in-water” emulsions of cross-linked and hydrophobically associating cationic polyacrylamide (CHCPAM) with cationic groups (methacrylatoethyl trimethyl ammonium chloride, DMC), hydrophobic groups (octadecyl methacrylate, OA), and cross-linked ...
Wei-Bing Wu   +4 more
doaj  

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