NEW SYNTHESES OF POLYBENZIMIDAZOLES,

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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 dlg. The structure of the polymer was confirmed by IR-spectroscopy and elemental analysis. Author

Author(s):
Korshak, V. V. ; Vinogradova, S. V. ; Pankratov, V. A.
Author Organization(s):
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Supplementary Note:
Edited trans. of Vysokomolekulyarnye Soedineniya. Seriya B (USSR) v10 n7 p481-482 1968, by L. Thompson.
Annotation:
New syntheses of polybenzimidazoles--Translation.
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FTD-HT-23-279-69
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*BENZIMIDAZOLES, *POLYMERIZATION), (*HEAT RESISTANT PLASTICS, BENZIMIDAZOLES), SYNTHESIS(CHEMISTRY), AMIDES, BIPHENYL, AMINES, USSR
Field(s)/Group(s):
Organic Chemistry, Plastics
Keyword(s):
ADIPONITRILE, *BENZIMIDAZOLE POLYMERS, BENZIDINE 3 3 DIAMINO, BIPHENYL TETRAMINES, TRANSLATIONS
Report Date:
1969 Jun 09