Abstract
Tetramethylthiuram disulfide-vulcanized cis-polybutadiene samples of different cross-link densities were swollen with deuterated solvent and directly imaged, using single and multiple spin-echo NMR imaging (NMRI) pulse sequences. Major structural voids, compression- and reaction-induced gradients of chain segment mobility, and general spatial inhomogeneity in the cross-link density of these samples have been observed. A simple analytical model has been applied to interpret changes in the distribution of T 2 values with increasing cure time
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