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Abstract:
Work on the poly(perfluoroalkylene-1,2,4,4H-triazole system has been continued with the objectives of increasing the polymer molecular weights, inactivating the polymer chain end-groups and studying polymer chemical and physical properties. A new synthesis of an intermediate polymer structure for this system has been found which involves addition of perfluoroalkyl- dihydrazides to perfluoroalkyldinitriles in a highly polar solvent. Inactivation of end-groups has been possible by conversion to -CF2COOH with subsequent decarboxylation to -CF2H. Methods of synthesis of poly(perfluoroalkylene-1,3,4- oxadiazoles) that have been studied include the direct formation of the oxadiazole ring by acylation of a bis(tetrazolyl)perfluoroalkane and formation of an intermediate poly(perfluorodiacyl hydrazine) from the reaction of perfluorodiacyl chlorides with perfluoroalkyldihydrazides.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Summary rept. 1 Mar 1965-28 Feb 1966 |
| Pages: |
49 |
| Report Date: |
AUG 1966 |
| Contract Number: |
615, AF336151368 |
| Report Number: |
0674008 |
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Keywords relating to this report:
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