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Libraries of methacrylic acid and oligo(ethylene glycol) methacrylate copolymers with LCST behavior
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Becer, C. Remzi, Hahn, Sabine, Fijten, Martin W. M., Thijs, Hanneke M. L., Hoogenboom, Richard and Schubert, Ulrich S. (2008) Libraries of methacrylic acid and oligo(ethylene glycol) methacrylate copolymers with LCST behavior. Journal of Polymer Science Part A: Polymer Chemistry, Vol.46 (No.21). pp. 7138-7147. doi:10.1002/pola.23018 ISSN 0887-624X.
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Official URL: http://dx.doi.org/10.1002/pola.23018
Abstract
Homopolymers of methacrylic acid (MAA), monoethyleneglycol methyl ether methacrylate (MEOMA), diethyleneglycol methyl ether methacrylate (MEO2MA), oligo(ethyleneglycol) methyl ether methacrylate (OEGMA475 and OEGMA1100) and oligo(ethyleneglycol) ethyl ether methacrylate (OEGEMA246) were synthesized with various chain lengths via reversible addition fragmentation chain transfer (RAFT) polymerization. The homopolymers of MAA, MEOMA and OEGMA1100 did not show any cloud point (CP) in the range of 0–100 °C, whereas at a pH value of 7, the CPs were found to be 20.6, 93.7, and 20.0 °C for p(MEO2MA), p(OEGMA475) and p(OEGEMA246), respectively, with an initial monomer to initiator ratio of 50. Furthermore, statistical copolymer libraries of MAA with OEGMA475 and OEGMA1100 were prepared. The cloud points of the random copolymers of MAA and OEGMA475 were found to be in the range of 20–90 °C; surprisingly, even though the homopolymers of MAA and OEGMA1100 did not exhibit any LCST behavior, the copolymers of these monomers at certain molar ratios (up to 40% OEGMA1100) revealed a double responsive behavior for both temperature and pH. Finally, the cloud points were found to be in the range of 22–98 °C, measured at pH values of 2, 4, and 7, while no cloud point was detected at pH 10. © Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 7138–7147, 2008
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, Copolymers, Methacrylic acid, Polymerization, Thermochemistry | ||||
Journal or Publication Title: | Journal of Polymer Science Part A: Polymer Chemistry | ||||
Publisher: | John Wiley & Sons Ltd. | ||||
ISSN: | 0887-624X | ||||
Official Date: | 2008 | ||||
Dates: |
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Volume: | Vol.46 | ||||
Number: | No.21 | ||||
Page Range: | pp. 7138-7147 | ||||
DOI: | 10.1002/pola.23018 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Dutch Polymer Institute (DPI) | ||||
Grant number: | 612 (DPI) |
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