Q. Feng
2007
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Journal
Fine chemicals
Abstract
Four novel bis(dodecyl phosphate) compounds,HDP,DGDP,BDP and PDP were synthesized using phosphorus oxychloride,diols(hexane-1,6-diol,diethylene glycol,butane-1,4-diol or hydroquinone) and dodecanol as raw materials,and purified by recrystallization in absolute ethyl alcohol.Their structures were characterized by IR,1HNMR,MS and potentiometric titration.Their ionization constants at 25 ℃ are 2.76×10-5 mol/L(HDP),3.940×10-4 mol/L(DGDP),1.595×10-4 mol/L(BDP),and 4.255×10-3 mol/L(PDP).The critical micelle concentration(CMC) of their aqueous solution at 20 ℃ are 3.5×10-4 mol/L(HDP),9.0×10-4 mol/L(DGDP),1.1×10-3 mol/L(BDP),and 1.3×10-3 mol/L(PDP).Their surface tension at CMC at 20 ℃ are 30.38 mN/m(HDP),34.49 mN/m(DGDP),35.31 mN/m(BDP),and 36.14 mN/m(PDP).DTA results showed that the decomposition temperature of four products are 231 ℃(BDP),251 ℃(HDP),227 ℃(PDP),and 249 ℃(DGDP);and the initial melting temperature are 87 ℃(BDP),80 ℃(HDP),97 ℃(PDP),and 72 ℃(DGDP).