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Proceedings Paper

ATR-FTIR spectroscopic studies of thermally induced conformational changes of PNIPAAm copolymers in solution
Author(s): Mihaela Avadanei; Gheorghe Fundueanu
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Paper 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.

Paper Details

Date Published: 26 July 2011
PDF: 8 pages
Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013I (26 July 2011); doi: 10.1117/12.894398
Show Author Affiliations
Mihaela Avadanei, Petru Poni Institute of Macromolecular Chemistry (Romania)
Gheorghe Fundueanu, Petru Poni Institute of Macromolecular Chemistry (Romania)

Published in SPIE Proceedings Vol. 8001:
International Conference on Applications of Optics and Photonics
Manuel Filipe Costa, Editor(s)

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