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- W2067759375 abstract "A series of pH-sensitive random copolymers, poly(styrene-co-4-vinylpyridine) (PSVP), with molecular weight about 10,000 and 4-vinylpyridine molar contents of 19-53%, were conveniently synthesized by free radical polymerization. The copolymers experience the formation, swell, and dissociation of multichain nanoparticles when the pH of the aqueous solutions/dispersions changes from 5.1 to 1.0. The nanoparticles have hydrodynamic diameters around 100 nm, a spherical shape, and a relatively uniform structure in a pH range of about 5-3 and a multicore structure at lower pH. The random distribution of the building units causes some of the hydrophilic units, protonated 4-vinylpyridine groups, to be trapped inside the nanoparticles. So the hydrophobicity of the nanoparticles is tunable by changing the 4-vinylpyridine content in the copolymers. For the copolymers with higher 4-vinylpyridine molar content, the pH range in which the multichain nanoparticles form shifts to higher values, the multichain nanoparticles dissociate, and the copolymers form single-chain hydrophobic domains at low pH." @default.
- W2067759375 created "2016-06-24" @default.
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- W2067759375 date "2008-07-01" @default.
- W2067759375 modified "2023-09-25" @default.
- W2067759375 title "Self-assembly of pH-sensitive random copolymers: Poly(styrene-co-4-vinylpyridine)" @default.
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- W2067759375 doi "https://doi.org/10.1016/j.jcis.2008.04.009" @default.
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