| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nyström, Bo
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Topics
Publications (6/6 displayed)
- 2019Differences in self‐assembly features of thermoresponsive anionic triblock copolymers synthesized via one‐pot or two‐pot by atom transfer radical polymerizationcitations
- 2017Structural and Rheological Properties of Temperature-Responsive Amphiphilic Triblock Copolymers in Aqueous Mediacitations
- 2017Mixed micelles of oppositely charged poly(N-isopropylacrylamide) diblock copolymerscitations
- 2015Small-Angle X-ray Scattering Studies of Thermoresponsive Poly(N-isopropylacrylamide) Star Polymers in Watercitations
- 2005Physical Properties of Aqueous Solutions of a Thermo-Responsive Neutral Copolymer and an Anionic Surfactantcitations
- 2005Association in Aqueous Solutions of a Thermoresponsive PVCL-g-C11EO42 Copolymer.citations
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article
Small-Angle X-ray Scattering Studies of Thermoresponsive Poly(N-isopropylacrylamide) Star Polymers in Water
Abstract
The behavior of a range of different stimuli-responsive star poly(N-isopropylacrylamide) (PNIPAAM) polymers in water was investigated using small-angle X-ray scattering (SAXS). The samples of 1, 2, and 5 wt % PNIPAAM stars with 2, 3, 4, and 6 arms were measured at seven temperatures ranging from 15 to 36 °C, which covers the known lower critical solution temperature (LCST) for linear PNIPAAM. The data were fitted with a Gaussian star form factor, and interactions were accounted for by a random-phase approximation (RPA) expression. A clear LCST was observed at ∼32 °C for the four polymers in agreement with turbidity data on the same polymers. The molecular weight was calculated from the forward scattering, which showed reasonable agreement with the values expected from the synthesis and characterization. From the fits the root- mean-square radius of gyration <Rg^2>^1/2 and the second virial coefficient A_2 were obtained and compared with the literature.