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 - 10.2172/750877
Subject(s) - copolymer , solubility , styrene , fluorocarbon , acrylate , viscometer , viscosity , polymer chemistry , chemical engineering , hydrocarbon , aqueous solution , materials science , 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, sulfated hydrocarbon-fluorocarbon random copolymers, semifluorinated trialkyltin fluorides and small hydrogen-bonding compounds were evaluated. Random copolymers of styrene and heptadecafluorodecyl acrylate were characterized by high solubility ion dense carbon dioxide and the most substantial increases in solution viscosity. Falling cylinder viscometry results indicated that the 29%styrene--71%fluoroacylate bulk-polymerized copolymer induced 2--250 fold increases in viscosity at copolymer concentrations of 0.2--5.0wt%