Accession Number:

ADA099301

Title:

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

Descriptive Note:

Technical rept. 1 Mar 81-28 Feb 82,

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OHIO DEPT OF MACROMOLECULAR SCIENCE

Personal Author(s):

Report Date:

1981-05-05

Pagination or Media Count:

23.0

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 ac 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 P21n,a 9.17A, b hydrocarbon chain axis and unique axis 12.15 A, c polydiacetylene axis 9.92A and the angle beta123.5 degrees. Author

Subject Categories:

  • Physical Chemistry
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE