NMR imaging of solids has been used to characterize the phase sizes with a spatial resolution of less than 50 um in immiscible mixtures containing polybutadiene. Butera et al. (1987) have reported improvement over the 13C NMR method by using magic angle spinning(MAS) in polymer blends containing a deuterated and a protonated polymer. More recently, Krejsa and Koenig(991, 1992), Smith and Koenig(1991), and Sarkar and Komoroski(1992) have used NMR for the determination of vulcanization efficiencies in elastomer blends. swollen state magnetic resonance has been developed to determine the retention and crosslink density of elastomer blends(Wang filler and Wang, 1997a; Groves, 1998: Loadman and Rubber, 1989