Abstract
Dehydration during temperature-induced phase separation in D 2O solutions of poly(vinyl methyl ether) (PVME), poly( N-isopropylmethacrylamide) (PIPMAm) and poly( N-isopropylacrylamide) (PIPAAm) was followed from time dependences of NMR spin–spin relaxation times T 2 of HDO. Both the time characterizing the exclusion of the water from mesoglobules (manifested by the increase in T 2 values) and the induction period which precedes the increase in T 2 values, increased in the order PVME < PIPMAm < PIPAAm. For D 2O solutions of PIPMAm/PVME (or PIPMAm/PIPAAm) mixtures a direct connection between the state of the mesoglobules (hydrated or dehydrated) formed by the component with lower LCST (PVME, PIPAAm) and the temperatures of the phase transition of the PIPMAm component was established by NMR spectroscopy.
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