AB-Type Monomers for the Preparation of Perfluorocycloalkene (PFCA) Aryl Ether Polymers
Abstract
A method for the preparation of AB-type monomers with complimentary fluoro-olefin and phenol functionalities is described. The three-step process is amenable to commercial scale up and uses widely available, commercial reagents including bisphenols and perfluorocycloalkene (PFCA) compounds. Title compounds and intermediates were characterized via multi-nuclear NMR and FT-IR spectroscopy providing structural and mechanistic elucidation of PFCA step-growth polymerizations. The formation of vinyl- and allyl substituted products were quantified and shown to be dependent on PFCA ring size and reaction medium. Nearly equal amounts of vinyl- and allyl-substituted products were observed with perfluorocyclohexene (PFCH) while 2-11% allyl-substitution was observed with perfluorocyclopentene (PFCP), depending on reaction medium polarity. Previous PFCA research and characterization of title compounds suggests that fluoride-catalyzed rearrangement is primarily responsible the formation of two substitution products. Polymerization of an AB-type monomer derived from bisphenol A is demonstrated and was shown to reproducibly result in film-forming polymers with higher molecular weights than previously described methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 25, 2014
- Accession Number
- AD1015269
Entities
People
- Aleksander A. Mansur
- Benjamin Batchelor
- Chloe H. Cook
- Dennis Jr W. Smith
- Raymond Campos
- Scott T Iacono
Organizations
- United States Air Force Academy