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[HTML][HTML] Universal properties of relaxation and diffusion in complex materials: Originating from fundamental physics with rich applications
KL Ngai - Progress in Materials Science, 2023 - Elsevier
Complex materials are composed of basic units which invariably interact with anharmonic
potentials. It is well known that the dynamics of systems with anharmonic interaction are …
potentials. It is well known that the dynamics of systems with anharmonic interaction are …
Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure
An intriguing problem in condensed matter physics is understanding the glass transition, in
particular the dynamics in the equilibrium liquid close to vitrification. Recent advances have …
particular the dynamics in the equilibrium liquid close to vitrification. Recent advances have …
Do theories of the glass transition, in which the structural relaxation time does not define the dispersion of the structural relaxation, need revision?
Upon decreasing temperature or increasing pressure, a noncrystallizing liquid will vitrify; that
is, the structural relaxation time, τ α, becomes so long that the system cannot attain an …
is, the structural relaxation time, τ α, becomes so long that the system cannot attain an …
The role of chain-end association lifetime in segmental and chain dynamics of telechelic polymers
Broadband dielectric spectroscopy, differential scanning calorimetry, and rheology were
employed to study the impact of hydrogen (H)-bonding end-groups on segmental and chain …
employed to study the impact of hydrogen (H)-bonding end-groups on segmental and chain …
Effect of hydrostatic pressure on the viscoelastic response of polyurea
Dielectric spectroscopy is used to measure the local segmental relaxation times for the soft
segments of a polyurea as a function of temperature and pressure. In combination with the …
segments of a polyurea as a function of temperature and pressure. In combination with the …
Studies on the Temperature and Time Induced Variation in the Segmental and Chain Dynamics in Poly (propylene glycol) Confined at the Nanoscale
The effect of 2D confinement on the dynamics of the normal mode (chain mobility) and
segmental relaxation in poly (propylene glycol)(PPG) has been studied with the use of …
segmental relaxation in poly (propylene glycol)(PPG) has been studied with the use of …
Excess wing in the dielectric loss spectra of propylene glycol oligomers at elevated pressure
Dielectric loss spectra at both ambient and elevated pressure are presented for propylene
glycol (PG), dipropylene glycol, and tripropylene glycol. While in previous literature the …
glycol (PG), dipropylene glycol, and tripropylene glycol. While in previous literature the …
A dielectric study of oligo-and poly (propylene glycol)
C Gainaru, W Hiller, R Bohmer - Macromolecules, 2010 - ACS Publications
The segmental and normal mode dynamics of poly (propylene glycol)(PPG) were studied
using dielectric spectroscopy for a wide range of molecular weights. For intermediate chain …
using dielectric spectroscopy for a wide range of molecular weights. For intermediate chain …
Thermodynamic scaling of vibrational dynamics and relaxation
We investigate by thorough molecular dynamics simulations the thermodynamic scaling (TS)
of a polymer melt. Two distinct models, with strong and weak virial-energy correlations, are …
of a polymer melt. Two distinct models, with strong and weak virial-energy correlations, are …
Temperature and density effects on the local segmental and global chain dynamics of poly (oxybutylene)
Dielectric spectroscopy measurements over a broad range of temperature and pressure
were carried out on poly (oxybutylene)(POB), a type A polymer (dielectrically active normal …
were carried out on poly (oxybutylene)(POB), a type A polymer (dielectrically active normal …