ATR-FTIR spectroscopic studies of thermally induced conformational changes of PNIPAAm copolymers in solution

Mihaela Avadanei; Gheorghe Fundueanu

doi:10.1117/12.894398

26 July 2011 ATR-FTIR spectroscopic studies of thermally induced conformational changes of PNIPAAm copolymers in solution

Mihaela Avadanei, Gheorghe Fundueanu

Author Affiliations +

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.

Citation Download Citation

Mihaela Avadanei and 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); https://doi.org/10.1117/12.894398

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available