THERMALLY STABLE PERFLUORINATED POLYMERS
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1966
- Accession Number
- AD0800476
Entities
People
- Henry C. Brown
Organizations
- University of Florida