26 July 2011 ATR-FTIR spectroscopic studies of thermally induced conformational changes of PNIPAAm copolymers in solution
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Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 80013I (2011) https://doi.org/10.1117/12.894398
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal
Abstract
The thermo-sensitive phase transition behavior of linear copolymers based on N-isopropylacrylamide and acrylamide (poly(NIPAAm-co-AAm)) has been studied by means of ATR - FTIR spectroscopy. The investigations were carried out in aqueous solution or different phosphate buffer systems (pH = 7.4). The variables here were the comonomer ratio in the copolymers, the copolymer concentration in the solution and the ionic strength of the solvent. Increasing the ratio of AAm in the final copolymer composition produced a large shifting of the lower critical transition temperature (LCST) towards higher values, as a well as a broadening of the phase transition domain, regardless the solvent type.
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Mihaela Avadanei, Gheorghe Fundueanu, "ATR-FTIR spectroscopic studies of thermally induced conformational changes of PNIPAAm copolymers in solution", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013I (26 July 2011); doi: 10.1117/12.894398; https://doi.org/10.1117/12.894398
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