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Crystal Structure and Thin Film Morphology of BBL Ladder Polymer
Synthetic Metals
  • H. H. Song, Han Nam University
  • Albert Fratini, University of Dayton
  • Michael Chabinyc, University of Dayton
  • A. K. Agrawal, Systran Corporation
  • J. Burkette, University of Dayton
  • Douglas Dudis, Air Force Research Laboratory
  • F. E. Arnold, Wright Laboratory
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Crystal structure and morphology of poly[7-oxo-7H-benzyl(d,e)imidazo(4′,5′:5,6)-benzimidazo(2,1-a)isoquinoline-3,4:10,11-tetrayl)-10-carbonyl] (BBL) ladder-like polymer were studied. The polymer forms a two-dimensional lattice of nematic liquid crystalline structure. An orthorhombic unit cell with cell parameters of a = 7.87 b = 3.37 c = 11.97 Å was determined from the fiber diffraction pattern. In this films, the rigid chains spontaneously form a layered structure across the film thickness, but in a very unusual manner, i.e. the very large molecular plane is standing perpendicularly to the film surface plane. The results are identical to our recent results of poly (p-phenylene benzobisthiazole) (PBT) film[7]. The polymer, however, lost its anisotropic order upon extrusion into a film and resulted in a fiber-like structure.
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Peer Reviewed
Citation Information
H. H. Song, Albert Fratini, Michael Chabinyc, A. K. Agrawal, et al.. "Crystal Structure and Thin Film Morphology of BBL Ladder Polymer" Synthetic Metals Vol. 69 Iss. 1-3 (1995)
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