Cooperative preassociation stages of PEO-PPO-PEO triblock copolymers: NMR and theoretical study

0341743 - ÚMCH 2011 RIV US eng J - Journal Article
Kříž, Jaroslav - Dybal, Jiří
Cooperative preassociation stages of PEO-PPO-PEO triblock copolymers: NMR and theoretical study.
Journal of Physical Chemistry B. Roč. 114, č. 9 (2010), s. 3140-3151. ISSN 1520-6106. E-ISSN 1520-5207
R&D Projects: GA ČR GA203/09/1478
Institutional research plan: CEZ:AV0Z40500505
Keywords : pluronics * pre-association * hydrophobic hydration * NMR * DFT
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 3.603, year: 2010

Using 1H and 13C 1D and 2D NMR spectra, PFG diffusion measurements and 13C relaxations supported by DFT calculations, the temperature-dependent behavior of (EO)m(PO)n(EO)m block copolymers (m/n = 31/14, 31/72, and 17/1) in D2O below and at the critical micellar temperature (CMT) was investigated. Changes in cooperative hydrophobic hydration and hydrogen bonds are found as primary pre-association process below CMT.
Permanent Link: http://hdl.handle.net/11104/0005838