Dynamics of Water in Partially Crystallized Solutions of Glass Forming Materials and Polymers: Implications on the Behavior of Bulk Water

2020 ◽  
pp. 169-194
Author(s):  
Silvina Cerveny ◽  
Jan Swenson
Keyword(s):  
Bulk Water ◽  
Glass Forming ◽  
Glass Forming Materials

scholarly journals Some Aspects of the Liquid Water Thermodynamic Behavior: From The Stable to the Deep Supercooled Regime

2020 ◽  
Vol 21 (19) ◽  
pp. 7269
Author(s):  
Francesco Mallamace ◽  
Giuseppe Mensitieri ◽  
Domenico Mallamace ◽  
Martina Salzano de Luna ◽  
Sow-Hsin Chen
Keyword(s):  
Liquid Water ◽  
Supercooled Liquid ◽  
Bulk Water ◽  
Bulk Liquid ◽  
Amorphous Phases ◽  
Glass Forming ◽  
Liquid Phases ◽  
Liquid Transition ◽  
Glass Forming Materials ◽  
Thermodynamic Anomalies

Liquid water is considered to be a peculiar example of glass forming materials because of the possibility of giving rise to amorphous phases with different densities and of the thermodynamic anomalies that characterize its supercooled liquid phase. In the present work, literature data on the density of bulk liquid water are analyzed in a wide temperature-pressure range, also including the glass phases. A careful data analysis, which was performed on different density isobars, made in terms of thermodynamic response functions, like the thermal expansion αP and the specific heat differences CP−CV, proves, exclusively from the experimental data, the thermodynamic consistence of the liquid-liquid transition hypothesis. The study confirms that supercooled bulk water is a mixture of two liquid “phases”, namely the high density (HDL) and the low density (LDL) liquids that characterize different regions of the water phase diagram. Furthermore, the CP−CV isobars behaviors clearly support the existence of both a liquid–liquid transition and of a liquid–liquid critical point.

Phenoxazine and N-phenyl-1-naphtylamine-based enamines as hole-transporting glass-forming materials

2009 ◽  
Vol 159 (11) ◽  
pp. 1014-1018 ◽  
Author(s):  
R. Paspirgelyte ◽  
J.V. Grazulevicius ◽  
S. Grigalevicius ◽  
V. Jankauskas
Keyword(s):  
Glass Forming ◽  
Hole Transporting ◽  
Glass Forming Materials

scholarly journals Fast Vibrational Modes and Slow Heterogeneous Dynamics in Polymers and Viscous Liquids

2019 ◽  
Vol 20 (22) ◽  
pp. 5708 ◽  
Author(s):  
Francesco Puosi ◽  
Antonio Tripodo ◽  
Dino Leporini
Keyword(s):  
Einstein Relation ◽  
Special Focus ◽  
Vibrational Dynamics ◽  
Viscous Liquids ◽  
Dynamical Heterogeneity ◽  
Glass Forming ◽  
Slowing Down ◽  
Molecular Glass ◽  
Distinctive Aspect ◽  
Glass Forming Materials

Many systems, including polymers and molecular liquids, when adequately cooled and/or compressed, solidify into a disordered solid, i.e., a glass. The transition is not abrupt, featuring progressive decrease of the microscopic mobility and huge slowing down of the relaxation. A distinctive aspect of glass-forming materials is the microscopic dynamical heterogeneity (DH), i.e., the presence of regions with almost immobile particles coexisting with others where highly mobile ones are located. Following the first compelling evidence of a strong correlation between vibrational dynamics and ultraslow relaxation, we posed the question if the vibrational dynamics encodes predictive information on DH. Here, we review our results, drawn from molecular-dynamics numerical simulation of polymeric and molecular glass-formers, with a special focus on both the breakdown of the Stokes–Einstein relation between diffusion and viscosity, and the size of the regions with correlated displacements.

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