Antiplasticization and the elastic properties of glass-forming polymer liquids

Soft Matter ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 292-304 ◽  
Author(s):  
Robert A. Riggleman ◽  
Jack F. Douglas ◽  
Juan J. de Pablo
Keyword(s):  
Elastic Properties ◽  
Glass Forming ◽  
Polymer Liquids

scholarly journals A Novel Viscosity-Temperature Model of Glass-Forming Liquids by Modifying the Eyring Viscosity Equation

2020 ◽  
Vol 10 (2) ◽  
pp. 428 ◽  
Author(s):  
Chunyu Chen ◽  
Huidan Zeng ◽  
Yifan Deng ◽  
Jingtao Yan ◽  
Yejia Jiang ◽  
...  
Keyword(s):  
Mathematical Expression ◽  
Impact Factors ◽  
Viscosity Data ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Regression Methods ◽  
Glass Forming ◽  
Viscosity Models ◽  
Polymer Liquids ◽  
Dependent Viscosity

Many models have been created and attempted to describe the temperature-dependent viscosity of glass-forming liquids, which is the foundational feature to lay out the mechanism of obtaining desired glass properties. Most viscosity models were generated along with several impact factors. The complex compositions of commercial glasses raise challenges to settle these parameters. Usually, this issue will lead to unsatisfactory predicted results when fitted to a real viscosity profile. In fact, the introduction of the reliable viscosity-temperature data to viscosity equations is an effective approach to obtain the accurate parameters. In this paper, the Eyring viscosity equation, which is widely adopted for molecular and polymer liquids, was applied in this case to calculate the viscosity of glass materials. On the basis of the linear variation of molar volume with temperature during glass cooling, a modified temperature-dependent Eyring viscosity equation was derived with a distinguished mathematical expression. By means of combining high-temperature viscosity data and the glass transition temperature (Tg), nonlinear regression analysis was employed to obtain the accurate parameters of the equation. In addition, we have demonstrated that the different regression methods exert a great effect on the final prediction results. The viscosity of a series of glasses across a wide temperature range was accurately predicted via the optimal regression method, which was further used to verify the reliability of the modified Eyring equation.

scholarly journals Elastic Properties and Glass Forming Ability of the Zr50Cu40Ag10 Metallic Alloy

2020 ◽  
Vol 310 ◽  
pp. 145-149 ◽  
Author(s):  
Ramil M. Khusnutdinoff ◽  
Anatolii V. Mokshin
Keyword(s):  
Glass Transition ◽  
Shear Modulus ◽  
Temperature Dependence ◽  
Elastic Properties ◽  
Metallic Glasses ◽  
Liquid Glass ◽  
Glass Forming Ability ◽  
Metallic Alloy ◽  
Poisson's Ratio ◽  
Glass Forming

The elastic properties of the Zr50Cu40Ag10 metallic alloy, such as the bulk modulus B, the shear modulus G, the Young’s modulus E and the Poisson’s ratio σ, are investigated by molecular dynamics simulation in the temperature range T=250–2000 K and at an external pressure of p=1.0 bar. It is shown that the liquid–glass transition is accompanied by a considerable increase in the shear modulus G and the Young’s modulus E (by more than 50%). The temperature dependence of the Poisson’s ratio exhibits a sharp fall from typical values for metals of approximately 0.32–0.33 to low values (close to zero), which are characteristic for brittle bulk metallic glasses. Non-monotonic temperature dependence of the longitudinal and transverse sound velocity near the liquid-glass transition is also observed. The glass forming ability of the alloy is evaluated in terms of the fragility index m. Its value is m≈64 for the Zr50Cu40Ag10 metallic glass, which is in a good agreement with the experimental data for the Zr-based metallic glasses.

scholarly journals Thermal and elastic properties of Cu–Zr–Be bulk metallic glass forming alloys

2007 ◽  
Vol 90 (21) ◽  
pp. 211901 ◽  
Author(s):  
Gang Duan ◽  
Mary Laura Lind ◽  
Katrien De Blauwe ◽  
Aaron Wiest ◽  
William L. Johnson
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Properties ◽  
Glass Forming

The meaning of the “universal” WLF parameters of glass-forming polymer liquids

2015 ◽  
Vol 142 (1) ◽  
pp. 014905 ◽  
Author(s):  
Jacek Dudowicz ◽  
Jack F. Douglas ◽  
Karl F. Freed
Keyword(s):  
Glass Forming ◽  
Polymer Liquids

scholarly journals Thermophysical and elastic properties of Cu50Zr50 and (Cu50Zr50)95Al5 bulk-metallic-glass-forming alloys

2006 ◽  
Vol 89 (24) ◽  
pp. 241917 ◽  
Author(s):  
G. J. Fan ◽  
M. Freels ◽  
H. Choo ◽  
P. K. Liaw ◽  
J. J. Z. Li ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Properties ◽  
Glass Forming

scholarly journals Glass forming ability, thermal stability and elastic properties of Zr-Ti-Cu-Be-(Fe) bulk metallic glasses

2016 ◽  
Vol 6 ◽  
pp. 1157-1160 ◽  
Author(s):  
Haitao Zong ◽  
Linyan Bian ◽  
Jingyun Cheng ◽  
Guohua Cao ◽  
Chaoyang Kang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Elastic Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming
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