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Perfluoroalkyl-philic Character of Poly(2-hydroxyethyl vinyl ether)-block-poly[2-(2,2,2-trifluoroethoxy)ethyl vinyl ether] Micelles in Water: Selective Solubilization of Perfluorinated Compounds
- Source :
- Macromolecules; October 31, 2000, Vol. 33 Issue: 22 p8295-8300, 6p
- Publication Year :
- 2000
-
Abstract
- Two types of amphiphilic block copolymer, poly(2-hydroxyethyl vinyl ether)-block-poly[2-(2,2,2-trifluoroethoxy)ethyl vinyl ether] (poly(HOVE-b-TFEOVE)) (m:n = 78:23) and poly(2-hydroxyethyl vinyl ether)-block-poly(n-butyl vinyl ether) (poly(HOVE-b-NBVE)) (m:n = 74:23), having the same ratios of polymerization degree in hydrophilic and hydrophobic segments with the same total chain length were synthesized, and the properties of their aqueous solutions were investigated, where m and n represent number-averaged polymerization degree of HOVE and TFEOVE or NBVE, respectively. By water surface tension measurements, the critical micelle concentrations (cmc's) of poly(HOVE-b-TFEOVE) and poly(HOVE-b-NBVE) were both estimated at 1.0 × 10<SUP>-4</SUP> mol/L. Solubilization of various fluoro and non-fluoro compounds using these polymer aqueous solutions was examined. It was confirmed that poly(HOVE-b-TFEOVE) solubilized more decafluorobiphenyl than did poly(HOVE-b-NBVE), whereas poly(HOVE-b-NBVE) solubilized more 2,6-dimethylnaphthalene than did poly(HOVE-b-TFEOVE). When a mixture of decafluorobiphenyl and 2,6-dimethylnaphthalene was added to the polymer solutions, poly(HOVE-b-TFEOVE) selectively solubilized decafluorobiphenyl, while poly(HOVE-b-NBVE) solubilized 2,6-dimethylnaphthalene predominantly, which was observed by the UV absorption spectrum of the polymer solutions.
Details
- Language :
- English
- ISSN :
- 00249297 and 15205835
- Volume :
- 33
- Issue :
- 22
- Database :
- Supplemental Index
- Journal :
- Macromolecules
- Publication Type :
- Periodical
- Accession number :
- ejs1149587