Abstract
1H-NMR spectra were obtained for 13 crude oils and 12 asphalts with a 60 MHz NMR spectrometer, and structural parameters (fa, σ, Haru/Car, and so on) were calculated by employing the expression proposed by J. K. Brown, W. R. Ladner and N. Sheppard.
C/H was found to have better relations with fa than dr (crude oils) and softening point (asphalts), and was thought to be a better indication of the structural characteristics for the petroleum products.
