Accession Number : AD0691653

Title :   NEW SYNTHESES OF POLYBENZIMIDAZOLES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Korshak,V. V. ; Vinogradova,S. V. ; Pankratov,V. A.

Report Date : 09 JUN 1969

Pagination or Media Count : 6

Abstract : Polybenzimidazoles were synthesized from adipamide dihydrochloride, diethyl diiminoadipate dihydrochloride and 3,3' -diaminiobenzidine, and also from adiponitrile and 3,3' -diaminobenzidine tetrahydrochloride both in melt and in N-methylphrolidinone solution. The melting temperatures and the solubilities of poly prepared by these methods approached those of polybenzimidazoles of a similar structure prepared from diphenyl adipate and 3,3' -diamino-benzidine. The polymers are light-brown powders soluble in sulfuric and formic acids, dimethylformamide, dimethylsulfoxide, dimethylacetamide, and other solvents. The reduced viscosity of 0.5 percent solution of the polymers in formic acid at 25 degrees C was 0.5 dl/g. The structure of the polymer was confirmed by IR-spectroscopy and elemental analysis. (Author)

Descriptors :   (*BENZIMIDAZOLES, *POLYMERIZATION), (*HEAT RESISTANT PLASTICS, BENZIMIDAZOLES), SYNTHESIS(CHEMISTRY), AMIDES, BIPHENYL, AMINES, USSR

Subject Categories : Organic Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE