Constitutive model for the finite deformation stress–strain behavior of poly(ethylene terephthalate) above the glass transition

Polymer ◽  
2000 ◽  
Vol 41 (6) ◽  
pp. 2183-2201 ◽  
Author(s):  
M.C. Boyce ◽  
S. Socrate ◽  
P.G. Llana
Keyword(s):  
Glass Transition ◽  
Constitutive Model ◽  
Finite Deformation ◽  
Ethylene Terephthalate ◽  
Stress Strain ◽  
Strain Behavior ◽  
Poly Ethylene Terephthalate ◽  
Deformation Stress ◽  
Poly Ethylene

Protein Forced Unfolding and Its Effects on the Finite Deformation Stress-Strain Behavior of Biomacromolecular Solids

2005 ◽  
Vol 874 ◽  
Author(s):  
H. Jerry Qi ◽  
Christine Ortiz ◽  
Mary C. Boyce
Keyword(s):  
Constitutive Model ◽  
Single Molecule ◽  
Biological Networks ◽  
Finite Deformation ◽  
State Theory ◽  
Force Extension ◽  
Stress Strain ◽  
Strain Behavior ◽  
Mechanics Model ◽  
Deformation Stress

AbstractMany proteins have been experimentally observed to exhibit a force-extension behavior with a characteristic repeating pattern of a nonlinear rise in force with imposed displacement to a peak, followed by a significant force drop upon reaching the peak (a “saw-tooth” profile) due to successive unfolding of modules during extension. This behavior is speculated to play a governing role in biological and mechanical functions of natural materials and biological networks composed of assemblies of such protein molecules. In this paper, a constitutive model for the finite deformation stress-strain behavior of crosslinked networks of modular macromolecules is developed. The force-extension behavior of the individual modular macromolecule is represented using the Freely Jointed Chain (FJC) statistical mechanics model together with a two-state theory to capture unfolding. The single molecule behavior is then incorporated into a formal continuum mechanics framework to construct a constitutive model. Simulations illustrate a relatively smooth “yield”-like stress-strain behavior of these materials due to activate unfolding in these microstructures.

Superstructure Evolution in Poly(ethylene terephthalate) during Uniaxial Deformation above Glass Transition Temperature

2006 ◽  
Vol 39 (8) ◽  
pp. 2909-2920 ◽  
Author(s):  
Daisuke Kawakami ◽  
Shaofeng Ran ◽  
Christian Burger ◽  
Carlos Avila-Orta ◽  
Igors Sics ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ethylene Terephthalate ◽  
Uniaxial Deformation ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Glass transition dynamics and cooperativity length of poly(ethylene 2,5-furandicarboxylate) compared to poly(ethylene terephthalate)

2016 ◽  
Vol 18 (25) ◽  
pp. 16647-16658 ◽  
Author(s):  
Amandine Codou ◽  
Matthieu Moncel ◽  
Jesper Gabriël van Berkel ◽  
Nathanaël Guigo ◽  
Nicolas Sbirrazzuoli
Keyword(s):  
Glass Transition ◽  
Ethylene Terephthalate ◽  
Transition Dynamics ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

The glass transition of poly(ethylene 2,5-furandicarboxylate) (PEF), an emergent bio-based polyester, was investigated in comparison to one of its chemical analogues: poly(ethylene terephthalate) (PET).

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