In figure 1 the hydrogen signal profiles of a solvent based alkyd sample are shown. About 10 minutes were needed to obtain each profile, because 512 averages were taken. From the figure two stages can clearly be identified. The first profiles show that the film shrinks, this process takes about one hour.
Figure 2: The front position as a function of time as measured by NMR.
S.J.F. Erich, J. Laven, L. Pel, H.P. Huinink, K. Kopinga, Comparison of NMR and confocal Raman microscopy as coating research tools, Prog. Org. Coat. 52, 210-216 (2005)
S.J.F. Erich, J. Laven, L. Pel, H.P. Huinink, K. Kopinga, Dynamics of cross linking fronts in alkyd coatings, Appl. Phys. Letters 86, 134105 (2005).
S.J.F. Erich, NMR imaging of curing processes in alkyd coatings, Ph.D. thesis, Eindhoven University of Technology, the Netherlands (2006).