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Polymerization-Induced Self-Assembly under Compressed CO2 : Control of Morphology Using a CO2 -Responsive MacroRAFT
Dewen Zhou1, Rhiannon P Kuchel2, Siming Dong1
1Centre for Advanced Macromolecular Design, School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
Abstract:
Polymerization-induced self-assembly of 2-hydroxypropyl methacrylate is conducted in water and water/MeOH using a CO2 -responsive macroRAFT agent in the form of a statistical copolymer comprising N,N-diethylaminoethyl methacrylate (DEAEMA) and poly(ethylene glycol) methyl ether methacrylate (M n = 475 g mol-1 ). Pressurization with CO2 leads to protonation of DEAEMA units within the stabilizer block, thereby offering a means of adjusting the charge density of the coronal layer. It is demonstrated that a wide range of tunable particle morphologies are accessible by simply varying the CO2 pressure during polymerization in the range of 10-45 bar.
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