By Christopher S. Brazel, Robin D. Rogers
ISBN-10: 084122031X
ISBN-13: 9780841220317
ISBN-10: 0841239363
ISBN-13: 9780841239364
This e-book comprises manuscripts from well-recognized foreign examine teams that experience taken diverse methods to utilizing ionic beverages in quite a few polymer functions. The chapters on polymer synthesis disguise conventional unfastened radical polymerizations, which were proven to development speedily and yield excessive molecular weight polymers, and opposite atom move polymerizations. the power to track molecular weights and synthesize block copolymers has been attributed to lengthy unfastened radical lifetimes in ionic drinks. different chapters disguise a number of makes use of for ionic beverages in polymer processing, designing particular fabric houses, and developing novel composites, corresponding to ion gels and ionic liquid-carbon nanotube constructs. This publication represents a brand new and intriguing box in polymer chemistry and physics, and is starting to be swiftly as extra primary wisdom of ionic beverages is uncovered.
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Extra resources for Ionic Liquids in Polymer Systems. Solvents, Additives, and Novel Applications
Example text
Therefore, polar solvents are preferred for polymerization of 2 (24). Although this monomer dissolves readily in 4b, the poIy-2 formed separates from the reaction mixture with progress of the polymerization. This observation agrees with previous reports on poly(sulfobetaines) indicating that solvents are needed that are both polar and protic (24-30). A similar precipitation was found for poly-l. Thus, it facilitates isolation of the polymers. Poly-l is a hydrophobic polymer that swells with the ionic liquid.
Haddleton D . M . , Chem. , 2002; p 2850. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2005. ; Mackenzie, S. ; Haddleton D . M . , Macromolecules, 2003; 36, p 5072. 16 M a , H . ; Wan, X . ; Chen, X . ; Zhou, Q. , Polymer, 2003; 44, p 5311. , Polym. , 2003; 52, p 1584. ; MacFarlane, D . , Chem. , 2004; p 700. 19 Scott, M . ; Brazel, C. ; Benton, M . ; Mays, J. ; Holbrey, J. D . ; Reichert, W . M . ; Rogers, R. D . , Chem. , 2002; p 1370. ; Cooper, A . ; Scott, K . ; Winterton, N .
This is evident from the N M R spectra of the polymers obtained by polymerization of 2 in 4b compared to samples prepared in water (Figure 9). The polymer synthesized in 4 b contains approximately a stoichiometric amount of the ionic liquid bound to the zwitterionic moieties even after washing. This observation agrees well with a previous report on the binding of various salts to polyzwitterions in bulk (28). Removing the bound ionic liquid from poIy-2 is not as easy as in case of poly-l. Extended Soxhlet extraction is necessary to purify poly-2.
Ionic Liquids in Polymer Systems. Solvents, Additives, and Novel Applications by Christopher S. Brazel, Robin D. Rogers
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