Polyphosphazene Electrolytes. 2. Synthesis and Properties of New Polymer Electrolytes Based on Poly((amino)[(2-methoxyethoxy)ethoxy])phosphazenes

Abstract

A series of ether group and amino group cosubstitutent phosphazene copolymers was synthesized and characterized by a combination of NMR, elemental analysis, and FTIR spectroscopy. The length of the alkyl group in the amino side chain and the content of the methoxyethoxyethoxy (MEE) substituent on the polymer properties were varied. Dynamic mechanical analysis (DMA) demonstrated that the cosubstitutent polymers prepared have better mechanical properties than the ether homopolyphosphazene, poly[bis(2-methoxyethoxy)ethoxy]phosphazene, MEEP. The copolymers that possessed multiple electron-donor coordination sites, nitrogen and oxygen atoms, were complexed with various amounts of lithium perchlorate (LiClO 4) to form polymer electrolytes. The ionic conductivity of the polymer electrolytes were determined by an impedance analyzer in a temperature range of 30-80 °C. According to those results, the conductivities of the prepared polymer electrolytes increased according to the rise in the MEE side chain contents and reached optima at F ) 0.2-0.25. The best conductivity obtained is 2.2 × 10 -5 S/cm for CPE-3A with F ) 0.25.

A facile method for the preparation of thermally remendable cross‐linked polyphosphazenes

“…Poly(dichlorophosphazene) (6.00 g, 103.2 mmol) was dissolved in 500 mL of dry THF in three‐neck flask. Furfurylamine (11.64 g, 120.0 mmol) and TEA (12.12 g, 120.0 mmol) were dissolved in 200 mL THF and were then added dropwise into the solution of poly(dichlorophosphazene) within 90 min; the mixture was stirred at room temperature for 48 h, and then heated to 60□ to react for 24 h under argon, filtered to remove insoluble salts afterwards 22, 24. The resultant polymer was then purified by precipitation of the concentrated reaction mixture in methanol and re‐dissolved in THF (three times) to remove residual furfurylamine and TEA, followed by precipitation from THF into hexane.…”

“…Allcock et al21 prepared several classical hydrophobic polyphosphazenes using 2,2,2‐trifluoroethoxy, aryloxy, fluoroalkoxy, phosphazo, fluoroaryloxy, and organosilicon as the substituents, and only the borderline hydrophobic can be translated into superhydrophobic materials and be used in environmental plasma treatment. Chen‐Yang et al22 synthesized a series of phosphazene copolymers using ether group and amino group as the co‐substituents, these copolymers could be used as solid polymer electrolyte for rechargeable batteries.…”

Crystal structure of hexaprop-2-en-1-yl 4,4′,4′′,4′′′,4′′′′,4′′′′′-[1,3,5,2λ5,4λ5,6λ5-triazatriphosphinine-2,2,4,4,6,6-hexaylhexakis(oxy)]hexabenzoate

“…Cyclotriphosphazene derivatives feature a planar sixmembered ring consisting of alternating N and P atoms (Wu et al, 2011). Their potential applications include solid polymer electrolytes (Allcock et al, 2001;Chen-Yang et al, 2000), flame retardants (Levchik et al, 2000), non-linear optics (Rojo et al, 2000) and biodegradable materials (Ibim et al, 1997). The title compound was prepared according to a literature procedure (Guo et al, 2009 Selected bond lengths (Å ).…”

Synthesis and Chemical Regularity in Phosphazene Copolymers

“…Examples include the polymers 21 (Chart 4), with 50% of phenoxy and polyether substituents that have 60% [NPAB] units and 20% each of [NPA 2 ] and [NPB 2 ] units[22]; the polymers 22[23] and 23[24]; the series 24[25], which includes one member to…”