Poly (ethylene oxide), PEO (Tg = -60oC), is able to complex with cations such as Li+ and Na+, and such systems have potential interest as battery electrolytes. What would you expect about the Tg of the PEO complex?

a. the Tg of the PEO complex to be higher than the pure polymer Tg b. the Tg of the PEO complex to be lower than the pure polymer Tg c. Both the PEO complex and pure polymer have same Tg d. None of the above