title: High-dielectric polymer composite materials from a series of mixed-metal phenylphosphonates, ATi(C6H5PO3)3 for dielectric energy storage.
abstract: We report the preparation of new polymer composite dielectric materials for energy storage applications. New layered 1:1 mixed A+2/Ti4+ metal phenylphosphonates, ATi(O3PC6H5)3, A=Mg, Ca, Sr, Ba, and Pb, have been prepared via a melt route, in which mixed metal oxides, ATiO3, were reacted with molten phenyl phosphonic acid. The mixed-metal phosphonates were combined with polystyrene (PS) via a solution route and cast as thin films for dielectric permittivity measurements. The ATi(O3PC6H5)3-PS composites exhibit a substantial enhancement in the dielectric permittivity as a function of weight loading relative to the parent ATiO3-PS composites. For both ATiO3-PS and ATi(O3PC6H5)3-PS, the composites' dielectric permittivity increases with A cation polarizability. Unusually large increases for 40 wt% ATi(O3PC6H5)3-PS composites (A=Sr, Ba, and Pb) indicate permittivity enhancement that goes beyond the effect of varying filler composition.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, South Carolina 29208, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Barber
authors.forename: Perry J
authors.initials: PJ
authors.lastname: Pellechia
authors.forename: Harry J
authors.initials: HJ
authors.lastname: Ploehn
authors.forename: H-C
authors.initials: HC
authors.lastname: zur Loye
mesh_terms: D025802:Electric Capacitance; D011211:Electric Power Supplies; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008670:Metals / Q000737:chemistry*; D063065:Organophosphonates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D008670:Metals; D063065:Organophosphonates; D011108:Polymers