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|Title:||Brush-type amphiphilic diblock copolymers from "livings"/ controlled radical polymerizations and their aggregation behavior||Authors:||Cheng, Z.
|Issue Date:||2-Aug-2005||Citation:||Cheng, Z., Zhu, X., Kang, E.T., Neon, K.G. (2005-08-02). Brush-type amphiphilic diblock copolymers from "livings"/ controlled radical polymerizations and their aggregation behavior. Langmuir 21 (16) : 7180-7185. ScholarBank@NUS Repository. https://doi.org/10.1021/la051038y||Abstract:||Two brush-type amphiphilic diblock copolymers, poly(poly(ethylene glycol)methyl ether methacrylate-block-polystyrene) (P(PEGMA)-b-PS) and poly(glycidyl methacrylate)-block-poly(poly(ethylene glycol)methyl ether methacrylate) (P(GMA)-b-P(PEGMA)) were synthesized, respectively, via consecutive atomtransfer radical polymerizations (ATRPs) and reversible addition-fragmentation chain-transfer (RAFT) polymerizations. The diblock copolymers were characterized by gel permeation chromatography (GPC), 1H nuclear magnetic resonance (NMR) spectroscopy, and FT-IR spectroscopy. The aggregation behavior of the two amphiphilic diblock copolymers in water was also studied. Scanning electron and transmission electron microscopic images revealed that spherical micelles (40-80 nm in diameter) from self-assembly of the P(PEGMA)-b-PS copolymers and wormlike micelles (60-120 nm in length and 20- 30 nm in diameter) from self-assembly of the P(GMA)-b-P(PEGMA) copolymers were prevalent. The spherical P(PEGMA)-b-PS micelles could self-assemble gradually into giant aggregates of several micrometers in diameter. © 2005 American Chemical Society.||Source Title:||Langmuir||URI:||http://scholarbank.nus.edu.sg/handle/10635/88599||ISSN:||07437463||DOI:||10.1021/la051038y|
|Appears in Collections:||Staff Publications|
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