Accession Number : ADA111661

Title :   Structure Determination of the Macromonomer Poly (1,11 - Dodecadiyne) and Its Crosspolymerized Product.

Descriptive Note : Technical rept. 1 Mar 81-27 Jun 82,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE

Personal Author(s) : Lando,Jerome B ; Thakur,M

PDF Url : ADA111661

Report Date : 27 Jun 1982

Pagination or Media Count : 25

Abstract : Electron diffraction patterns were obtained from the macromonomer and cross-polymerized crystals of Poly(1,11 Dodecadiyne). The macromonomer was cast in thin ( 200 A) films from chloroform solution. Crosspolymerization resulted from subsequent exposure of these samples to Co60 - gamma radiation. Two orientations of the crosspolymerized crystals were obtained by varying the evaporation rate of solvent in the original macromonomer diposition. Thirty-six reflections for the crosspolymerized sample and eighteen reflections for the macromonomer were obtained. Refinement of the structures was accomplished with these data. The unit cell of both macromonomer and crosspolymerized material was monoclinic, space group P2 sub 1 1n.

Descriptors :   *Polymers, *Electron diffraction, *Molecular structure, *Monomers, Polymerization, Chloroform, Solvents, Solutions(Mixtures), Rates, Refining, Gamma rays, Polycrystalline, Cross sections, Decanes, Crystals, Cobalt, Isotopes, Radiation

Subject Categories : Plastics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE