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Lower critical solution temperature behavior of comb and graft shaped poly[oligo(2-ethyl-2-oxazoline)methacrylate]s
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Weber, Christine, Becer, C. Remzi, Hoogenboom, Richard and Schubert, Ulrich S. (2009) Lower critical solution temperature behavior of comb and graft shaped poly[oligo(2-ethyl-2-oxazoline)methacrylate]s. Macromolecules, Vol.42 (No.8). pp. 2965-2971. doi:10.1021/ma8028437 ISSN 0024-9297 .
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Official URL: http://dx.doi.org/10.1021/ma8028437
Abstract
Comb and graft polymers with lower critical solution temperature (LCST) behavior based on hydrophilic oligo(2-ethyl-2-oxazoline) side chains and a hydrophobic methacrylate backbone were synthesized using the macromonomer method. Well-defined oligo(2-ethyl-2-oxazoline) methacrylate (OEtOxMA) macromonomers were obtained by direct end-capping of living oligo(2-ethyl-2-oxazoline) chains with in situ formed triethylammonium methacrylate. The macromonomers were subsequently polymerized in a controlled manner using the reversible addition−fragmentation chain transfer (RAFT) polymerization technique yielding a series of comb polymers with varying side chain length and backbone length. In addition, a series of graft copolymers were prepared by copolymerizing OEtOxMA with methyl methacrylate (MMA, 40−80 mol %). The copolymers were characterized by 1H NMR spectroscopy, size exclusion chromatography (SEC), and, partially, by matrix-assisted laser desorption ionization (MALDI-TOF) mass spectrometry. The LCST behavior of aqueous polymer solutions was investigated by turbidity measurements revealing cloud points that can be tuned from 35 to 80 °C by variation of the MMA content.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Polymers, Polymethylmethacrylate, Methyl methacrylate, Thermochemistry | ||||
Journal or Publication Title: | Macromolecules | ||||
Publisher: | American Chemical Society | ||||
ISSN: | 0024-9297 | ||||
Official Date: | 2009 | ||||
Dates: |
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Volume: | Vol.42 | ||||
Number: | No.8 | ||||
Page Range: | pp. 2965-2971 | ||||
DOI: | 10.1021/ma8028437 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Dutch Polymer Institute (DPI), Thuringia (Germany). Ministerium für Bildung, Wissenschaft und Kultur, Fonds der Chemischen Industrie (Germany) | ||||
Grant number: | 612 (DPI) |
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