scholarly journals “Liquid, gel and soft glass” phase transitions and rheology of nanocrystalline cellulose suspensions as a function of concentration and salinity

Soft Matter ◽  
2018 ◽  
Vol 14 (10) ◽  
pp. 1953-1963 ◽  
Author(s):  
Yuan Xu ◽  
Aleks D. Atrens ◽  
Jason R. Stokes
Keyword(s):  
Phase Transitions ◽  
Glass Phase ◽  
Nanocrystalline Cellulose ◽  
Continuous Transition ◽  
Soft Glass

Rheological methods reveal a continuous transition between microstructure states of nanocellulose colloidal rod suspensions.

Crystal-glass phase transitions in the adatom layers

1981 ◽  
Vol 37 (4) ◽  
pp. 335-339 ◽  
Author(s):  
Yu.E. Lozovik ◽  
A.V. Klyuchnik
Keyword(s):  
Phase Transitions ◽  
Glass Phase ◽  
Crystal Glass

scholarly journals Salt-Induced Swelling and Volume Phase Transition of Polyelectrolyte Gels

2017 ◽  
Vol 84 (5) ◽  
Author(s):  
Yalin Yu ◽  
Chad M. Landis ◽  
Rui Huang
Keyword(s):  
Phase Transitions ◽  
Salt Concentration ◽  
Volume Fraction ◽  
External Solution ◽  
Quantitative Agreement ◽  
Continuous Transition ◽  
Volume Phase ◽  
Polyelectrolyte Gels ◽  
Monovalent Ions ◽  
Polymer Solvent

A theoretical model of polyelectrolyte gels is presented to study continuous and discontinuous volume phase transitions induced by changing salt concentration in the external solution. Phase diagrams are constructed in terms of the polymer–solvent interaction parameters, external salt concentration, and concentration of fixed charges. Comparisons with previous experiments for an ionized acrylamide gel in mixed water–acetone solvents are made with good quantitative agreement for a monovalent salt (NaCl) but fair qualitative agreement for a divalent salt (MgCl2), using a simple set of parameters for both cases. The effective polymer–solvent interactions vary with the volume fraction of acetone in the mixed solvent, leading to either continuous or discontinuous volume transitions. The presence of divalent ions (Mg2+) in addition to monovalent ions in the external solution reduces the critical salt concentration for the discontinuous transition by several orders of magnitude. Moreover, a secondary continuous transition is predicted between two highly swollen states for the case of a divalent salt. The present model may be further extended to study volume phase transitions of polyelectrolyte gels in response to other stimuli such as temperature, pH and electrical field.

Commensurate-Glass Phase Transitions in Staged Sbcl5-GIC

1982 ◽  
Vol 20 ◽  
Author(s):  
L. Salamanca-Riba ◽  
G. Timp ◽  
L.W. Hobbs ◽  
M.S. Dresselhaus
Keyword(s):  
Phase Transition ◽  
Experimental Study ◽  
Glass Transition ◽  
Phase Transitions ◽  
Electron Diffraction ◽  
Low Temperatures ◽  
Glass Phase ◽  
Driving Mechanism ◽  
X Ray Diffraction ◽  
X Ray

ABSTRACTAn experimental study is reported of the commensurate (√7 × √7)R19.1° to glass phase transition in stages I < n > 4 graphite-SbCl5 using electron and x-ray diffraction. The electron diffraction studies show an in-plane phase transition to a glass at low temperatures. The (00l) x-ray diffraction scans show that the c-axis layered structure of the intercalate is unchanged by the phase transition. A driving mechanism for the commensurate to glass transition is suggested.

Electron paramagnetic resonance in the quasi-two dimensional magnetic ludwigite Fe3O2BO3

2002 ◽  
Vol 12 (9) ◽  
pp. 351-354
Author(s):  
J. Dumas ◽  
J. L. Tholence ◽  
M. Continentino ◽  
J. C. Fernandes ◽  
R. B. Guimaraes ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Phase Transitions ◽  
Glass Phase ◽  
Structural Transition ◽  
Weak Ferromagnetism ◽  
Two Dimensional ◽  
Antiferromagnetic Transition ◽  
Paramagnetic Resonance ◽  
Temperature Dependences ◽  
Electron Paramagnetic

We report an EPR study of the quasi-two dimensional oxide Fe3O2BO3 which shows a structural transition at 283 K, an antiferromagnetic transition at 112K and weak ferromagnetism below 73 K. The single crystals show three strongly anisotropic lines with different temperature dependences of their widths and resonance fields. The results are discussed in relation with the different phase transitions and with the Wigner glass phase which appears between ~112 K and ~200 K.

scholarly journals Evidence for glass and spin-glass phase transitions from the dynamic susceptibility

1997 ◽  
Vol 102 (2) ◽  
pp. 207 ◽  
Author(s):  
D. Bitko ◽  
S.N. Coppersmith ◽  
R.L. Leheny ◽  
N. Menon ◽  
S.R. Nagel ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Spin Glass ◽  
Glass Phase ◽  
Dynamic Susceptibility ◽  
Spin Glass Phase
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