Correlation of C-13 NMR analysis and physical testing results of natural rubber

摘要

The methods of solid-state C-13 NMR and physical testing were used to examine carbon black filled natural rubber samples. The rubber samples were vulcanized under varying parameters of sulfur loading, cure times, and cure temperature. At constant cure time and cure temperature, the two testing methods correlate well over a wide range of sulfur concentrations. Varying cure time and cure temperature produced large changes in the mechanical testing results but small change in the C-13 NMR analysis of the sulfur vulcanizates. [References: 12]