Abstract
Pulsed nuclear magnetic resonance (NMR) technique was used to study molecular motions in the crosslinked polyetherurethanes from polyoxypropyleneglycoles (POPG), 1,1,1-trimethylolpropane and 2,4-toluenediisocyanate. Temperature dependences of spin-lattice (T1) and spin-spin (T2) relaxation times for these polymers were established. It was shown that the molecular mobility in the systems depends on the urethane group concentration. The relation between the free induction decay shape and polymer composition and temperature was analyzed.
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