The ionic-liquid polymers, p [vbim][PF6], based on the conventional ionic liquid and the ones, p[vpNH2im][PF6], based on the taskspecific ionic liquid have been synthesized. The ionic-liquid-structure segment mole fraction of the polymers could be controlled by adjusting the reactants' mole fraction. The ionized segment fractions in p[vmim]PF6 were 19.7, 38.5 and 85.0 % at the condition of the mole fractions of 1-bromobutane to imidazole unit in the reaction mixture were 0.2, 0.5 and 1.2,

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... tively. And the latter was 78.1 % at 3-bromopropylamine hydrobromide to imidazole unit in the reaction mixture was 1.2. Thermal analysis indicated that the polymers had good thermal stability and the grafted chain had little effects on the polymer's glass transition temperatures.