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Thermoresponsive hydrogels based on N-isopropylacrylamide, N-tertiary butylacrylamide (NTBA) and methacrylamide (MAAm) have been prepared by free radical copolymerization in water–dioxane mixture. Fourier transform infrared spectroscopy confirmed the presence of all monomers in the hydrogel system. Scanning electron microscopy revealed that the hydrogel having higher amount of NTBA had more smooth...
Steady state and dynamic behaviour of swelling of spin coated polyacrylamide films have been studied at room temperature in a precisely controlled environment of 12–99% relative humidity (RH). Swelling of the films was monitored by measuring the thickness of the films using X-ray reflectivity and Atomic Force Microscopy. Swellibility of the films was observed to be independent of thickness of the...
Swelling dynamics of spin coated ultrathin polyacrylamide films, annealed at the onset of thermal degradation temperature (220 °C) of polyacrylamide have been studied using in situ X-ray reflectivity technique to understand the effects of thermal modification of the polymer to their swelling dynamics. The results are compared with those of thermally annealed unmodified films from our previous study...
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