This book focuses on novel perflurocycloalkenyl (PFCA) aryl ether polymers, derived via polycondensation of perfluorocycloalkenes with bisphenols. Chapter 1 describes the detailed background of fluorine, its reactivity and effect in organic chemistry. This chapter also discusses the application of fluoropolymers with a detailed study of two fluoropolymers: perfluorocyclobutyl aryl ether polymers and fluorinated arylene vinylene ether polymers. Chapter 2, 3 and 4 describe the detailed synthesis, characterization and different properties of bis-PFCA aryl ether monomers, perfluorocyclopentenyl (PFCP) aryl ether polymers and perfluorocyclohexenyl (PFCH) aryl ether polymers, respectively. Chapter 3 also includes the potential crosslinking and post-functionalization studies of PFCA aryl ether polymers. Chapter 5 discusses the application section of these newly synthesized PFCA aryl ether polymers. Ultra low dielectric constant (k = 1.53) materials with self-cleansing properties were synthesized via incorporation of fluorodecyl-polyhedral oligomeric silsesquioxane (FD-POSS) into PFCP aryl ether polymers.