TY - JOUR
T1 - Bimodal crystallization rate curves of a molecular liquid with Field-Induced polymorphism
AU - Duarte, D. M.
AU - Richert, R.
AU - Adrjanowicz, K.
N1 - Funding Information:
Part of this work was supported by the National Science Foundation under grant no. DMR-1904601 . Financial support from the National Science Centre within the framework of the SONATA BIS project ( Grant No. 2017/26/E/ST3/00077 ) is greatly acknowledged.
Publisher Copyright:
© 2021 The Authors
PY - 2021/11/15
Y1 - 2021/11/15
N2 - In this study, we use dielectric spectroscopy to explore how frequency and amplitude of an applied strong electric field affect the overall crystallization kinetics over a range of temperatures, focusing on a molecular system with field-induced polymorphism: vinyl ethylene carbonate (VEC). The volume fraction of the field-induced polymorph can be controlled by the parameters of the high-electric field, i.e., frequency and amplitude. We find that the crystallization rate maximum of the field induced polymorph is located at lower temperatures relative to the that of the regular polymorph. The temperature of the highest crystallization rate for the regular polymorph was found to be unaffected by the electric field, but the overall rates increase with increasing field amplitude. The dimensionality of crystal growth is also analyzed via the Avrami parameter and is frequency invariant but affected by the field amplitude. Our results demonstrate that a detailed knowledge of the influence of high fields on crystallization facilitates control over the crystallization behavior and the final product outcome of molecular systems, providing new opportunities for material engineering and improving pharmaceuticals.
AB - In this study, we use dielectric spectroscopy to explore how frequency and amplitude of an applied strong electric field affect the overall crystallization kinetics over a range of temperatures, focusing on a molecular system with field-induced polymorphism: vinyl ethylene carbonate (VEC). The volume fraction of the field-induced polymorph can be controlled by the parameters of the high-electric field, i.e., frequency and amplitude. We find that the crystallization rate maximum of the field induced polymorph is located at lower temperatures relative to the that of the regular polymorph. The temperature of the highest crystallization rate for the regular polymorph was found to be unaffected by the electric field, but the overall rates increase with increasing field amplitude. The dimensionality of crystal growth is also analyzed via the Avrami parameter and is frequency invariant but affected by the field amplitude. Our results demonstrate that a detailed knowledge of the influence of high fields on crystallization facilitates control over the crystallization behavior and the final product outcome of molecular systems, providing new opportunities for material engineering and improving pharmaceuticals.
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U2 - 10.1016/j.molliq.2021.117419
DO - 10.1016/j.molliq.2021.117419
M3 - Article
AN - SCOPUS:85114612699
SN - 0167-7322
VL - 342
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 117419
ER -