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Gel‐Type Polyacrylic Resins Cross‐Linked with Trimethylolpropanetrimethacrylate: The Issue of Their Nanostructure and Molecular Accessibility Unveiled with a Combination of Inverse Steric Exclusion Chromatography (ISEC), and ESR and CP‐MAS 13 C NMR Spectroscopy
Author(s) -
Pozzar Franco,
Sassi Alessandro,
Pace Giuseppe,
Lora Silvano,
D'Archivio Angelo Antonio,
Jeřàbek Karel,
Grassi Alfonso,
Corain Benedetto
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500679
Subject(s) - steric effects , magic angle spinning , size exclusion chromatography , polyacrylic acid , chemistry , nanostructure , polymer , gel permeation chromatography , polymer chemistry , nuclear magnetic resonance spectroscopy , materials science , stereochemistry , organic chemistry , nanotechnology , enzyme
Six gel‐type functional resins, that is, three poly‐DMAA‐ co ‐TMPTP (DMAA= N , N ‐dimethylacrylamide, TMPTP=trimethylolpropyltrimethacrylate) samples with different degrees of cross‐linking (0.6, 1.2, 1.7 % mol) and three poly‐DMAA‐ co ‐MA‐ co ‐TMPTP (MA=methacrylic acid, ca. 5.5 % mol) samples with 1.7, 3.5, and 7 % mol cross‐linking were investigated with ISEC (inverse steric exclusion chromatography), and ESR and CP‐MAS (cross polarization magic angle spinning) 13 C NMR spectroscopy after swelling in water and other solvents. This unprecedented combination of conceptually independent physicochemical techniques provides a thorough overall consistent picture of the morphology of the resins on the nanometer scale and of the molecular accessibility of the swollen polymer framework to the paramagnetic probe TEMPONE (2,2,6,6‐tetramethyl‐4‐oxo‐1‐oxypiperidine) and to selected solvents.