چكيده فارسي :
In the past few years, poly (ionic liquids)(PILs), which combined the unique properties of
ionicliquids (ILs) and polymer architecture, have attracted a lot ofattention [1]. Recently, the
polymerized ILs have been received growingattentions as alternatives to the organic liquid
electrolytes andTraditional ILs electrolytes in dye sensitized solar cell (DSSCs) [2].The
electrolyte is one of the most crucial components in it is responsible for the inner charge
carrier transport between electrodes and continuously regenerates the dye and itself during
DSSC operation. Additionally, the electrolyte has great influence on the light-to-electric
conversion efficiency and long-term stability of the devices [3]. PILs usually possess various
functions such as transportation of target ions, providing specific polarenvironment, and
giving good mechanical strength; these functions depend on both IL structure and polymer
main chain. In this work, we report a new type of imidazolium based poly(ionic liquids) (a)
prepared usingimidazolium ionic liquid monomer (NVImBr) and methylmethacrylate
(MMA)in different molar ratios via free radical polymerization method.For the improvement
of mechanical properties of theses ion conductive polymers,addition of small amount of
cross-linker is quite effective before polymerization. Therefore, the network copolymers (b)
were synthesized by NVImBr and MMA in the presenceof poly (ethylene glycol)
dimethacrylate as cross linker (1and 3 mol %). From our study, very small amount of crosslinker
did not affect the ionic conductivity but considerably improved the thermal stability and
mechanical properties.The obtained PILs and networks were characterized and examined using FTIR,
1H NMR, DSC, XRD and EIS.
