Controlled Dispersion Polymerization in Supercritical Carbon Dioxide

2009 ◽  
Vol 62 (8) ◽  
pp. 786 ◽  
Author(s):  
Kristofer J. Thurecht ◽  
Steven M. Howdle
Keyword(s):  
Carbon Dioxide ◽  
Free Radical ◽  
Radical Polymerization ◽  
Material Properties ◽  
Supercritical Co2 ◽  
Dispersion Polymerization ◽  
Free Radical Polymerization ◽  
Short Report ◽  
Controlled Polymerization ◽  
Increased Activity

Recent advances in controlled polymerization have led to increased activity in controlled free radical polymerization in unconventional solvents. This short report focuses on the renewed interest in dispersion polymerization in supercritical CO2 brought about by the application of controlled free radical polymerization techniques. The emergence of novel and industrially-applicable materials is discussed, as well as the dependence of material properties and morphology upon factors such as surfactant type and how it is employed during the polymerization.

Kinetics of Free Radical Polymerization of Spacerless Dendronized Macromonomers in Supercritical Carbon Dioxide

2011 ◽  
Vol 44 (11) ◽  
pp. 4038-4048 ◽  
Author(s):  
L. I. Costa ◽  
G. Storti ◽  
M. Morbidelli ◽  
X. Zhang ◽  
B. Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Free Radical ◽  
Supercritical Carbon Dioxide ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Kinetics Of ◽  
Supercritical Carbon

Fixation of carbon dioxide concurrently or in tandem with free radical polymerization for highly transparent polyacrylates with specific UV absorption

2016 ◽  
Vol 7 (22) ◽  
pp. 3731-3739 ◽  
Author(s):  
Bin Liu ◽  
Ying-Ying Zhang ◽  
Xing-Hong Zhang ◽  
Bin-Yang Du ◽  
Zhi-Qiang Fan
Keyword(s):  
Carbon Dioxide ◽  
Free Radical ◽  
Radical Polymerization ◽  
Wavelength Range ◽  
Free Radical Polymerization ◽  
Uv Absorption ◽  
Fixation Of Carbon Dioxide

Highly transparent CO2-based polyacrylates with nearly 100% UV absorption in a wavelength range of 200–313 nm are prepared.

Homogeneous Controlled Free Radical Polymerization in Aqueous Media

2002 ◽  
Vol 55 (7) ◽  
pp. 367 ◽  
Author(s):  
A. B. Lowe ◽  
C. L. McCormick
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Aqueous Media ◽  
Free Radical Polymerization ◽  
Specific Reference ◽  
Controlled Polymerization ◽  
Stable Free Radical ◽  
Water Solvent ◽  
Reversible Addition ◽  
Chain Transfer Polymerization

The ability to conduct controlled radical polymerizations (CRP) in homogeneous aqueous media is discussed. Three main techniques, namely stable free radical polymerization (SFRP), with an emphasis on nitroxide-mediated polymerization (NMP), atom transfer radical polymerization (ATRP) and reversible addition-fragmentation chain transfer polymerization (RAFT) are examined. No examples exist of homogeneous aqueous NMP polymerization, but mixed water/solvent systems are discussed with specific reference to the NMP of sodium 4-styrenesulfonate. Aqueous ATRP is possible, although monomer choice is limited to methacrylates and certain styrenics. Finally, homogeneous aqueous RAFT polymerizations are examined. We demonstrate the greater versatility of this technique, at least in terms of monomer variety, by discussing the controlled polymerization of charged and neutral acrylamido monomers and of a series of ionic styrenic monomers. Many of these monomers cannot/have not been polymerized by either NMP or ATRP.

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