Physical aging is a ubiquitous phenomenon in glassy materials and originates from the fact
that they are generally out-of-equilibrium. Due to the technological and fundamental …

The fate of matter when decreasing the temperature at constant pressure is that of passing
from gas to liquid and, subsequently, from liquid to crystal. However, a class of materials can …

The rate at which a nonequilibrium system decreases its free energy is commonly ascribed
to molecular relaxation processes, arising from spontaneous rearrangements at the …

The phenomenology of the glass transition and the associated behavior in the near liquid
and glassy states are detailed, including the cooling rate dependence of the glass transition …

We investigated the kinetics of enthalpy recovery of several glass-forming polymers at
temperatures significantly below the glass transition temperature (T g) and for aging times …

Being composed of alternating soft segments and hard segments, thermoplastic
polyurethane (TPU) always displays complicated thermal behaviors on the heating scans …

The Kauzmann paradox and associated Kauzmann temperature are two of the most widely
debated topics in glass science over the past eighty years. Both conceptualized by Walter …

Polymers below their glass transition temperature (T g) are non-equilibrium glasses
because excess free volume “frozen” between kinetically-restricted polymer chains slowly …

Metallic glasses are non-equilibrium materials and the glass transition temperature upon
heating T g, h can be used to characterize the kinetic stability of the glass. Annealing below …

A glass is not in thermodynamic equilibrium below its glass transition temperature (T g), and
consequently, its properties, such as enthalpy, volume, and mechanical properties, evolve …