Accession Number:

AD0681612

Title:

A STUDY OF CERTAIN POLYMERS WITH A CONJUGATE-BOND SYSTEM USING EPR AND IR SPECTROSCOPY METHODS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1968-07-02

Pagination or Media Count:

8.0

Abstract:

EPR and IR spectroscopy methods were used to investigate polymers with conjugate carbon bonds and polymers having small conjugation sectors forming complexes with copper. The concentration of spin centers was determined by graphic integration in comparison with the signal of the investigated substance and a reference point. The polymers containing conjugate polyine groups were obtained in two ways by dehydrochlorinating polyvinylidene chloride by sodium amide or by the reaction of oxidizing polycondensation of polyacetylene. It is concluded that when conjugation in polymer systems is increased there is a symbatic change in concentration of unpaired electrons and the background of absorption of the infrared spectra. The EPR and IR methods have demonstrated the role of copper in formation of the basic state of cumulene structure in polyine carbine. Complex formation in the studied polymers proceeds both along the bond CO and the triple bond C-C and is characterized by absorption bands of 1610 and 750cm in the IR spectra and by the signal of bivalent copper in the EPR spectra. A narrow EPR signal is not characteristic of such complexes. Author

Subject Categories:

  • Polymer Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE