| 초록 |
Amphiphilic dendritic-b-linear copolymers consisting of a hydrophilic poly(ethylene oxide) (PEO) dendron and a hydrophobic linear poly(ethylene-alt-propylene) (PEP), were synthesized via living anionic polymerization, catalytic hydrogenation and a repetitive tosylation and phenolic O-alkylation. Because both the dendron size of PEO and the chain length of PEP can be easily tuned, a series of dendritic PEO-b-PEPs was prepared. Self-assembly and ionic transportation behavior of its lithium triflate-doped samples in bulk were investigated by transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and impedance analyzer. We found that varying the lithium salt doping ratio ([Li+]/[EO]= 0.05, 0.07 and 0.1) and increasing the dendron size of PEO led to efficient ionic transportation, it arises from a combination of morphological and dimensional changes of hydrophilic matrix. Compared to recent research, the system exhibited interesting conductivity property. |
