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A New Double-Responsive Block Copolymer Synthesized via RAFT Polymerization: Poly(N-isopropylacrylamide)-block-poly(acrylic acid)
Abstract
Poly( N -isopropylacrylamide)- block -poly(acrylic acid), PNIPAAm- b -PAA, with low polydispersity was prepared by reversible addition−fragmentation chain transfer (RAFT) polymerization in methanol. The block copolymers respond to both temperature and pH stimuli. The behavior of the double-responsive block copolymers in solution was investigated by dynamic light scattering, temperature-sweep NMR, cryogenic transmission electron microscopy, and IR spectroscopy. The block copolymers form micelles in aqueous solutions in dependence of pH and temperature. Cloud point measurements indicated the formation of larger aggregates at pH 4.5 and temperatures above the lower critical solution temperature (LCST) of PNIPAAm. The solution behavior is strongly influenced by hydrogen bonding interactions between the NIPAAm and acrylic acid blocks.
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Citations
Cited by
Radical addition–fragmentation chemistry in polymer synthesis
Moad, G., Rizzardo, E., & Thang, S. H. (2008) · Polymer · doi:10.1016/j.polymer.2007.11.020 · Cited by 1,397
Self-citationResponsive polymers in controlled drug delivery
Bajpai, A. K., Shukla, S. K., Bhanu, S., & Kankane, S. (2008) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2008.07.005 · Cited by 1,391
Kocak, G., Tuncer, C., & Bütün, V. (2017) · Polymer Chemistry · doi:10.1039/c6py01872f · Cited by 1,189
Ge, Z., & Liu, S. (2013) · Chemical Society Reviews · doi:10.1039/c3cs60048c · Cited by 914
Prabaharan, M., & Mano, J. F. (2006) · Macromolecular Bioscience · doi:10.1002/mabi.200600164 · Cited by 347
Metadata
- Authors
- Schilli, C. M., Zhang, M., Rizzardo, E., Thang, S. H., Chong, ). Y. K., Edwards, K., Karlsson, G., & Müller, A. H. E.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-09-21
- Volume
- 37
- Issue
- 21
- Pages
- 7861-7866
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2071634878
- Cited by
- 543
- References
- 0
- FWCI
- 23.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Schilli, C. M., Zhang, M., Rizzardo, E., Thang, S. H., Chong, ). Y. K., Edwards, K., Karlsson, G., & Müller, A. H. E. (2004). A New Double-Responsive Block Copolymer Synthesized via RAFT Polymerization: Poly(N-isopropylacrylamide)-block-poly(acrylic acid). Macromolecules. https://doi.org/10.1021/ma035838w
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