Effect of cross-linking on the molecular motion of water in polymer gel as studied by pulse 1H NMR and PGSE 1H NMR |
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| Affiliation: | 1. Department of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Hungary;2. Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Hungary;3. MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, Egyetem tér 1, H-4032 Hungary;4. Nuclear Analysis and Radiography Department, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 29-33, Budapest, H-1121 Hungary;5. Neutron Spectroscopy Department, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 29-33, Budapest, H-1121 Hungary;1. Institute of Technology, The Pedagogical University of Kraków, Podchorążych 2, 30-084 Kraków, Poland;2. Department of Drug Technology and Pharmaceutical Biotechnology, Medical University of Warsaw, Banacha 1, 02-097 Warszawa, Poland |
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| Abstract: | 1H NMR measurements on the spin-spin relaxation time (T2) and self-diffusion coefficient (DH2O) of water in a poly(metacrylic acid) gel were carried out to clarify the molecular motion of water molecules as a function of the degree of cross-linking under a constant amount of water contained in the gel. From experimental results, it was found that 1H T2 and DH2O decrease with an increase in the degree of cross-linking in the gel. It can therefore be said that an increase in cross-linking leads to a restraint of molecular motion of the water molecules in the gel. |
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