Open AccessNovel CO{sub 2}-thickeners for improved mobility control
Author(s) -
Dr Robert M. Enick,
Dr Eric J. Beckman,
Dr Andrew Hamilton
Publication year - 2000
Language(s) - English
Resource type - Reports
DOI - 10.2172/750876
Subject(s) - copolymer , viscometer , fluorocarbon , styrene , acrylate , viscosity , solubility , polymer chemistry , chemical engineering , materials science , hydrocarbon , aqueous solution , chemistry , organic chemistry , polymer , composite material , engineering
The objective of this study was to design, synthesize, and characterize thickening agents for dense carbon dioxide and to evaluate their solubility and viscosity-enhancing potential in CO{sub 2}. Hydrocarbon-fluorocarbon random copolymers, sulfonated hydrocarbon-fluorocarbon random copolymers, semifluorinated trialkyltin fluorides and small hydrogen-bonding compounds have been evaluated. Random copolymers of styrene and heptadecafluorodecyl acrylate yielded substantial increases in viscosity. Falling cylinder viscometry results indicated that the 29%styrene--71%fluoroacrylate bulk-polymerized copolymer induced very significant viscosity increases at copolymer concentrations of 0.1--5.0wt%