Figure 2. Characteristic changes of PEG-b-PLACL and PEG-b-PLACL-stabilized squalene emulsion at 37 °C.

(A) In vitro hydrolytic degradation of PEG-b-PLACL performed in water at 37 °C. M_n,t/M_n,0 was calculated from the ratio of the number-average molecular weight (M_n) of the polymer at each degradation time point to the initial M_n. (B) Visual aspects of the emulsion upon storage at 37 °C for one year. The particle size of the emulsified formulations was measured by DLS. The data are expressed as the mean value with standard deviation of three samples.