Smaller differences compared to A-PentOx-A were observed in the Tg values of the neat polymers and the polymer-plasticizer blends (Figure ). For the samples comprising A-PentOx-A a deviation of the T g values of 4 °C was observed, depending on whether either triethyl citrate or ethylene glycol was used, whereas for A-BuOx-A, A-PentOzi-A and A-BuOzi-A, the same or essentially same Tg of 44 °C, 52 °C and 38/37 °C, respectively, was observed.