Structure Determination of Crosspolymerized Poly (1, 11 - Dodecadiyne).

Abstract

Electron diffraction patterns were obtained from crosspolymerized crystals of poly (1,11-dodecadiyne), formed by casting thin (>200A) films of uncrosspolymerized polymer from chloroform. Two orientations of these crystals were obtained by varying the evaporation rate of the chloroform solvent. Crosspolymerization resulted from subsequent exposure of these samples to Co60 radiation. Thirty-six independent reflections were obtained from the a*c* reciprocal lattice net and a lattice net having b* and the (h 0 h) reciprocal lattice direction as orthogonal axes. Refinement of the structure was accomplished with these data. The unit cell of the crosspolymerized material was monoclinic, space group P2(1)/n,a = 9.17A, b (hydrocarbon chain axis and unique axis) = 12.15 A, c (polydiacetylene axis) = 9.92A and the angle beta=123.5 degrees. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 05, 1981
Accession Number
ADA099301

Entities

People

  • Jerome B. Lando
  • Meghna Thakur

Organizations

  • Case Western Reserve University

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  • Air Platforms
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DTIC Thesaurus Topics

  • Alkynes
  • Chemical Engineering
  • Chemistry
  • Crystal Structure
  • Crystals
  • Diffraction
  • Dihedral Angle
  • Electron Diffraction
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  • Materials
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  • Chemistry

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  • Nanofabrication and Microfabrication.
  • Polymer Science and Technology

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