Research Polyphosphazenes Conductive Material Synthesis Technology And Performance

Polyphosphazene is a linear or ringy polymer, of which the main chain is compose of the nitrogen and phosphorus atoms by arranging alternatively of single and double bonds. Its performance is intervenient among inorganic, organic and high-molecular compound. Because of particularity of chemical structure and activity of chemical reaction, a series of new polymer materials with special performance can be synthetized by nucleophilic substitution reaction, of which main chain consist of P and N inorganic atom and side chain were substituted with various organic groups. A variety of derivatives have be developed and applied to manufacturing resin, thin films, coatings, elastomers, fibers, medicine, engineering plastics and various additives, and has been widely used in industry.This paper study synthesis process of poly (diethylene glycol mono-methyl ether/bis (dimethoxy ethyl) amino) phosphazene and poly-bis (bis (dimethylamino-ethyl) amino) phosphazene with poly(dichlorophosphazene), diethylene glycol group monom ethyl ether/bis (dimethoxy-ethyl) amine and bis (dimethoxy ethyl) amine. The conductive polyphosphazenes polymer material is obtained through compositing of the lithium saltAt first, poly(dichlorophosphazene) was synthesized by opening polymerization of hexachlorocyclotriphosphazenering for10h at250℃and studied effect of reaction temperature and time on the polymerization reaction. The research indicated that the yield of the poly(dichlorophosphazene) increases firstly and then decreases with the increase of temperature and time. Infrared spectroscopy (IR) demonstrate synthetic material is poly(dichlorophosphazene).Secondly, poly (diethylene glycol mono-methyl ether/bis (dimethoxy ethyl) amino) phosphazene was synthesized by nucleophilic substitution with the monomethyl ether of diethylene glycol group/bis (dimethoxy-ethyl) amine as a substituent. Its optimum synthesis process:the reaction is synthesized at250℃for10h under reflux and stirring, the ratio of the total number of the monomethyl ether of diethylene glycol group/bis (dimethoxyethyl) and the chlorine atoms number moles of poly dichlorophosphazenemoles is1:1, the sodium salt of diethyleneglycolmono- methylether was adding firstly and then add bis(dimethoxyethyl)amine. The reaction yield can reach up to38.4%. The infrared spectroscopy (IR),1HNMR,13CNMR, XRD, SEM, TGA analysis show that poly(diethyleneglycol-basedsingle-ether/bis-(dimethoxy-ethyl)amine)phosphazene has a fine thermal endurance properties at0～130℃.Thirdly, poly-bis(bis (dimethylamino-ethyl) amino) phosphazene was synthesized by nucleophilic substitution reaction with bis (dimethoxy ethyl) amine as substituted group. Its optimum synthesis:the reaction is synthesized for24h at60℃under reflux and stirring, the molar ratio of bis(dimethylamino-ethyl)-amine and poly(dichlorophosphazene) is2.8:1, and the molar ratio of triethylamine and poly(dichlorophosphazene) is2.5:1, the highest product yield is33.5%. The infrared spectroscopy (IR),1HNMR,13CNMR, XRD, SEM, TGA detections show that polydi(bis(dimethoxy-ethyl)amine)-phosphazene has a fine thermal endurance properties at0～110℃.Finally, the polyphosphazene polymer solid electrolyte was manufactured by compositing of the lithium salt and polyphosphazene synthesized in a certain proportion under stirring and reflux for2h. The conductivity of composite solid electrolyte increases firstly and then decreases with increasing of the molar ratio of the lithium salt and polyphosphazene. When mol Li+/repeat unit was0.15and the molar ratio of diethyleneglycolmonomethylether and bis-(dimethylamino-ethyl)amine was1:1, the conductivity of the poly(diethylenegly-coltheylmonomethylether/bis-(dimethoxyethyl)amino)phosphazene electrolyte and the poly-bis(bis(dimethylamino-ethyl)amino)phosphazene electrolyte obtained reached2.71×10-8S/cm and4.21×108S/cm respectively.