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Dispersion Polymerizations in Supercritical Carbon Dioxide
Abstract
Conventional heterogeneous dispersion polymerizations of unsaturated monomers are performed in either aqueous or organic dispersing media with the addition of interfacially active agents to stabilize the colloidal dispersion that forms. Successful stabilization of the polymer colloid during polymerization results in the formation of high molar mass polymers with high rates of polymerization. An environmentally responsible alternative to aqueous and organic dispersing media for heterogeneous dispersion polymerizations is described in which supercritical carbon dioxide (CO 2 ) is used in conjunction with molecularly engineered free radical initiators and amphipathic molecules that are specifically designed to be interfacially active in CO 2 . Conventional lipophilic monomers, exemplified by methyl methacrylate, can be quantitatively (>90 percent) polymerized heterogeneously to very high degrees of polymerization (>3000) in supercritical CO 2 in the presence of an added stabilizer to form kinetically stable dispersions that result in micrometer-sized particles with a narrow size distribution.
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Cited by
Molecular origins of fluorocarbon hydrophobicity
Dalvi, V. H., & Rossky, P. J. (2010) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0915169107 · Cited by 421
Enzyme-Catalyzed Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide
Loeker, F. C., Duxbury, C. J., Kumar, R., Gao, W., Gross, R. A., & Howdle, S. M. (2004) · Macromolecules · doi:10.1021/ma0349884 · Cited by 126
Bratton, D., Brown, M., & Howdle, S. M. (2003) · Macromolecules · doi:10.1021/ma034453a · Cited by 47
Metadata
- Authors
- DeSimone, J. M., Maury, E. E., Menceloglu, Y. Z., McClain, J. B., Romack, T. J., & Combes, J. R.
- Venue
- Science
- Published
- 1994-07-15
- Volume
- 265
- Issue
- 5170
- Pages
- 356-359
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2031776732
- Cited by
- 647
- References
- 0
- FWCI
- 25.39
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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