Sungkapreechaa, ChanitaFocke, Walter WilhelmAndrosch, Rene2020-01-302020-02Sungkapreecha, C.; Focke, W. W.; Androsch, R. Competition between liquid-liquid de-mixing, crystallization, and glass transition in solutionsof PLA of different stereochemistry and DEET. Chinese Journal of Polymer Science 2020, 38, 174–178 (2020). https://doi.org/10.1007/s10118-019-2314-0.0256-7679 (print)1793-7043 (online)10.1007/s10118-019-2314-0http://hdl.handle.net/2263/73022Liquid-liquid (L-L) de-mixing and vitrification of solutions of either crystallizable poly(L-lactic acid) (PLLA) or non-crystallizable poly(D/L-lactic acid) (PDLLA) with 50 m% N, N-diethyl-3-methylbenzamide (DEET) were analyzed by calorimetry and cloud-point measurements, which allows drawing conclusions about the effect of polymer stereochemistry on the phase behavior. Regardless of the PLA stereochemistry, vitrification of the solutions on fast cooling, hindering crystallization of PLLA, occurred below −20 °C and suppressed prior L-L de-mixing. The experimental results prove that crystallization in samples containing crystallizable PLLA, observed at around 55 °C on slow cooling, is not preceded by L-L de-mixing.en© Chinese Chemical Society Institute of Chemistry, Chinese Academy of Sciences Springer-Verlag GmbH Germany, part of Springer Nature 2019. The original publication is available at : https://link.springer.com/journal/10118.CrystallizationPoly(D/L-lactic acid) (PDLLA)Poly(lactic acid) (PLA)N-diethyl-3-methyl-benzamide (DEET)Liquid-liquid phase separationThermally-induced phase separation (TIPS)Postprint Article