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The mean dipole moments of Dagang atmosphere residue (DG-AR) fractions were investigated. DG-AR can be partitioned into six fractions: saturates and light aromatics, heavy aromatics, light resins, middle resins, heavy resins, and asphaltenes. The mean dipole moments of these fractions are 1.19, 2.88, 3.79, 4.92, 6.36, and 11.70 Debye, respectively, which increase from saturates and light aromatics...
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