The characterization of the distribution of carbon black (CB) in rubber blends is important for the improvement of the strength of the rubber materials. It is generally accepted that CB is not uniformly dispersed in rubber blends because of the different compatibilities between the CB and each rubber component. It is considered that the compatibility between the CB and rubber is affected by various environments; i.e., unsaturation, viscosity, polarity, mixing procedure, etc.Solid-state 13C NMR is expected to be a tool to determine the distribution ratio of CB in rubber blends. It is found that the relationships between the line width of polymer's resonance lines and CB contents are estimated from the dipolar decoupling / magic angle spinning (DD/MAS) 13C NMR spectra. These relationships are used as calibration curves. On the basis of these calibration curves, the distribution ratio of CB in the rubber blend is determined.

Analysis of rubber by high-resolution solid-state <sup>13</sup>C NMR

245th National Meeting (2013)

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Analysis of rubber by high-resolution solid-state 13C NMR

Analysis of rubber by high-resolution solid-state ¹³C NMR