The combination of 1H magic angle spinning (MAS) n.m.r, and two-dimensional nuclear Overhauser enhancement spectroscopy (NOESY) is shown to be readily applicable to hydrogels. This is demonstrated in the superabsorbing polymer, hydrolysed starch-g-poly(acrylonitrile), which readily responds to hydration. Enhanced molecular mobility of the polymer is directly revealed by polymer-polymer NOESY connectivities. The two-dimensional experiment also reveals the presence of an efficient cross-relaxation mechanism between the water of hydration and the polymer.
Посилання на статтю:
1H MAS n.m.r, and two-dimensional nuclear Overhauser enhancement spectroscopy in hydrogels / S. Ganapathy, P. R. Rajamohanan, P. M. Ramanujulu, A. B. Mandhare andR. A. Mashelkar // Polymer. – 1994. – Vol 35. – P. 888-891.