As in the case of the homopolymers, no significant differences were observed for the different stereoisomers within A-pEtEtOx-A and A-pPrMeOx-A series. Compared to the corresponding homopolymers, the triblock copolymers containing pEtEtOx have a lower Tg, while the triblock copolymers comprising pPrMeOx blocks have higher Tg. Obviously, no microphase separation occurs in this system under the investigated conditions, leading to one Tg value in between the Tg values of pMeOx and pEtEtOx or pPrMeOx, respectively. Similar to the situation in the homopolymers, the polymers in the A-pEtEtOx-A and A-pPrMeOx-A series exhibited a higher Tg than their structural isomers A-pPrOzi-A (Tg≈50 °C) and A-pBuOx-A (Tg ≈62 °C). Table . Physicochemical characterization of the triblock copolymers including the yield, molecular weight Mn, dispersity Đ, glass transition temperature Tg and the extrapolated onset temperature of major mass loss Td, critical micelle concentration CMC, and hydrodynamic diameter Dh.