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Nuclear Magnetic Resonance (NMR) microscopy was used to study the dynamics and diffusion of the internal water flow in erodible Hydroxypropylmethylcellulose (HPMC) and Polyvinylalcohol (PVA) polymers of pharmaceutical interest. Polymers in the form of tablets were hydrated at 37°C continuously and monitored at regular intervals with a 500 MHz NMR microscope. The diffusion and spin–spin relaxation...