Quantitative Analysis of Crosslinked Structure in Rubber Materials by Sulfur K-edge NEXAFS

Quantitative analysis of crosslinked structure in vulcanized rubber is not enough. There have been some methods based on mechanical properties but no methods to obtain only information on the crosslinked structure. We have solved that problem by curve fitting of sulfur K-edge near-edge X-ray absorption fine structure (NEXAFS) spectra. NEXAFS is useful to determine the chemical structure of the target element. The crosslinked structure obtained by NEXAFS shows a high correlation with the orthodox method. We have established the useful method to assist the orthodox analysis results. We have clarified the relationship between heat resistance of rubber materials and crosslinked structure using NEXAFS in this study.