STRUCTURE, INTERACTION AND PHASE TRANSITION OF VACUUM RESIDUE IN APOLAR SOLVENTS. IN: AMERICAN CHEMICAL SOCIETY SYMPOSIUM ON CHEMISTRY AND CHARACTERIZATION OF ASPHALTS, AUGUST 1990, WASHINGTON, D.C.

Structure, interaction, and phase transition of a vacuum residue fraction in various apolar solvents were investigated, using viscosity measurements and small angle neutron scattering. Both light and heavy ended fractions form colloidal particles of spherical shape with average sizes of -40 and -60 angstroms respectively. Rheological studies of these fractions indicated significant particle solvation. The solvation mechanism is through association of the solvent molecules with individual VR colloids, instead of through solvent entrapment between agglomerated colloids. The viscosity, as a function of temperature, suggested a glass-like transition at approximately 254 K for the heavy ended fraction at 0.5 volume fraction. The small angle neutron scattering measurements confirmed the colloidal structure determined from rheological study. It also provided the information about the total colloids/solvent interfacial area, from which the authors found that VR colloids have a rough surface.

  • Corporate Authors:

    Marcel Dekker, Incorporated

    270 Madison Avenue
    New York, NY  United States  10016
  • Authors:
    • Sheu, E Y
    • De Tar, M M
    • Storm, D A
  • Publication Date: 1992-5

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 607-647
  • Serial:
    • Volume: 10
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 00626078
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 2 1993 12:00AM