FORMATION AND PROPERTIES OF POLYSTYRENE-BLOCK-POLY(2-HYDROXYETHYL METHACRYLATE) MICELLES

Citation
Gj. Liu et al., FORMATION AND PROPERTIES OF POLYSTYRENE-BLOCK-POLY(2-HYDROXYETHYL METHACRYLATE) MICELLES, Macromolecules, 29(1), 1996, pp. 220-227
Citations number
43
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
00249297
Volume
29
Issue
1
Year of publication
1996
Pages
220 - 227
Database
ISI
SICI code
0024-9297(1996)29:1<220:FAPOPM>2.0.ZU;2-9
Abstract
Polystyrene-block-poly(2-hydroxyethyl methacrylate) (PS-b-PHEMA) sampl es of different molar masses have been synthesized. These polymers for med micelles in THF/cyclohexane mixtures. The change in the hydrodynam ic radius and aggregation number of these micelles as a function of cy clohexane volume fraction f(c) has been investigated. We also report s ome preliminary fluorescence results of pyrene- and fluorene-labeled P S-b-PHEMA. The increase in energy transfer from fluorene, attached ran domly at a density of <5% to the PHEMA block, to pyrene, attached at t he junction point between PS and PHEMA, provides a sensitive measure f or micelle formation. The energy transfer efficiency in micelles was h igh, and excimer formation between different fluorene groups was negli gible. This will facilitate micellar core size determination by energy migration.