The copolymerization of ethylene oxide (EO)

glycol methyl glycidyl ether (nGE) and allyl glycidyl ether (AGE) catalyzed by

i

-Bu

3

Al/H

3

PO

4

/DBU has been examined. The microstructures

thermal properties and molecular weights of the obtained polymers were characterized by nuclear magnetic resonance spectroscopy (NMR)

gel permeation chromatography (GPC) and differential scanning calorimeter (DSC). The results showed that the

i

-Bu

3

Al/H

3

PO

4

/DBU catalyst serves as an excellent catalyst for the copolymerization of EO

n

GE

and AGE to afford a family of ether chain modified poly(ethylene oxide). The obtained EO-

n

GE copolymers and EO-

n

GE-AGE terpolymers with controllable contents were conveniently obtained in 100% yield within 30 min by changing the feed ratio. The ether chain length of

n

GE has no effect on the copolymerization. The cross-linked copolymers were prepared using the EO-

n

GE-AGE terpolymer as precursors and 1

2-ethanedithiol as a crosslinking agent. The properties of copolymers revealed that the ether chain length and content

crosslinking had a significant impact on the conductivity and mechanical properties of copolymers. The copolymers with tetraethylene glycol methyl glycidyl ether (4GE) as a comonomer exhibited higher conductivity than that of diethylene glycol methyl glycidyl ether (2GE). With the increase of the content of 4GE in the EO-4GE copolymers

the conductivity increased

but the mechanical properties decreased. The appropriate crosslinking degree improved not only the mechanical properties but also conductivity. The cross-linked EO-4GE-AGE polymer electrolytes containing 39 mol% 4GE and 2 mol% AGE showed the tensile strength and conductivity of 1.41 MPa and 9×10

-5

S·cm

-1

at 30 ℃

respectively.