Synthesis and Characterization of Perfluoroalkyl Heterocyclic Elastomers
Abstract
Perfluoroalkyl bibenzoxazole polymers containing a (CF2)8 between heterocyclic rings have been prepared by the reaction of dihydroxybenzidine and methyl perfluorosebacimidate. Through preparation of this polymer, the basic polymerization system has been significantly improved and polymers with number average molecular weights as high as 20,400 have been obtained in good yield and purity. These materials are thermally stable to approximately 500 C. (TGA). Copolymers of dihydroxybenzidine and methyl perfluoro-4,9,14,19- tetraoxadocosanediimidate, which are tacky and resilient, have been prepared by the same basic reaction. Number average molecular weights of approximately 11, 500 have been achieved, but the polymer molecular weights have not been optimized. Thermal stability is comparable to the sebacimidate polymer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1968
- Accession Number
- AD0845863
Entities
People
- Charles D. Burton
- Norman L. Madison