パルスNMR法と1H-NMR法によるアスファルト類組成分析物の検討

抄録

12 Kinds of asphalts were fractionated by the usual composition analytical method to give asphaltenes, maltenes, and waxy substances. Their contents show fairly good relationships with softening temperatures, and 1/T₂ values of asphalts.
Pulsed- and high resolution-NMR measurements were made of the fractions of 8 asphalts out of 12 asphalts.
Asphaltenes from all the asphalts were thought to have almost same structures and characters (T₂≅12 μsec), and their contents vary with the asphalts.
Maltenes had no characteristic structures owing to the imperfect fractionation employed in this study, and their content in the asphalt is the largest.