Self-association of double-hydrophilic copolymers of acrylic acid and poly(ethylene oxide) macromonomer

Poly(ethylene oxide) (PEO) end-capped by a methacrylate unsaturation was copolymerized with acrylic acid by RAFT with dibenzyltrithiocarbonate as a chain transfer agent. Tapered triblock copolymers consisting of a poly(acrylic acid) (PAA) inner block and comb-like outer blocks of PEO macromomers wer...

Full description

Bibliographic Details
Published in:Polymer
Main Authors: Khousakoun, E., Gohy, Jean-François, Jérôme, R.
Other Authors: ULg (Université de Liège) - CERM (Centre d'Etude et de Recherche sur les Macromolécules), UCL - Autre
Format: Article in Journal/Newspaper
Language:English
Published: 2004
Subjects:
Double-hydrophilic block copolymers
Copolymers
High temperature effects
Ionization
Light scattering
PH effects
Transmission electron microscopy
Polyethylene oxides
Acrylic acid
Carbonic acid derivative
Copolymer
Self-association
Macrogol
Methacrylic acid
Monomer
Polyacrylic acid
Water
Article
Chemical composition
Chemical reaction
Chemical structure
Hydrophilicity
Stimuli-responsive copolymers
Ionic strength
Morphology
PH measurement
Polymerization
Solubility
Stimulus response
Temperature measurement
Copolymer compositions
Polymer science
Dynamic light scattering (DLS)
Free chains
Methycrylate unsaturation
Acrylics
Copolymerization
Carbonic acid
Online Access:http://hdl.handle.net/2078/131355
https://doi.org/10.1016/j.polymer.2004.10.020
Description
Summary:Poly(ethylene oxide) (PEO) end-capped by a methacrylate unsaturation was copolymerized with acrylic acid by RAFT with dibenzyltrithiocarbonate as a chain transfer agent. Tapered triblock copolymers consisting of a poly(acrylic acid) (PAA) inner block and comb-like outer blocks of PEO macromomers were formed as result of the comonomers reactivity ratios. Composition of these copolymers and length of the PEO branches were varied. Dynamic light scattering (DLS) was used to characterize the aggregates formed in water and to investigate their response to stimuli, such as pH, temperature and ionic strength. In parallel, the morphology of the aggregates was directly observed by transmission electron microscopy (TEM). Well-defined aggregates were formed in the 5 8 as consequence of the complete ionization of the PAA block. © 2004 Elsevier Ltd. All rights reserved.

Similar Items