Novel fluorinated poly(aryl ether)s derived from 1,2-bis(4-(4-fluorobenzoyl)phenoxy)-hexafluorocyclobutane

Acenaphthylene‐derived perfluorocyclobutyl aromatic ether polymers

“…15 Traditionally, PFCB polymers are prepared by the step-growth, [2 + 2] thermal cyclodimerization of functional trifluorovinylether (TFVE) monomers in melt or in solution. Semifluorinated PFCB polymers are also obtained by polymerization of PFCB containing monomers mediated by classical methods including; Huisgen's 1,3-dipolar cycloaddition, 16 nucleophilic aromatic substitution, 17 and more recently, by Suzuki polycondensation. 12 Depending on the functionality, branching, and network formation, PFCB polymers typically exhibit high glass transition temperatures (T g = 150-300+ C), and thermal stability under air and nitrogen atmospheres T d > 400 C. In addition to aromatic groups, various TFVE monomers bearing inorganic cores, including siloxanes 3,18 and polyhedral oligomeric silsesquioxanes, [19][20][21] have also been synthesized and evaluated for high temperature, low-k applications.…”