Discussion of craze formation and growth in amorphous polymers in terms of the multiplicity of glass transition at low temperatures

1989 ◽  
Vol 267 (7) ◽  
pp. 557-567 ◽  
Author(s):  
E. Donth ◽  
G. H. Michler
Keyword(s):  
Glass Transition ◽  
Low Temperatures ◽  
Amorphous Polymers

scholarly journals Predicting glass transition of amorphous polymers by application of cheminformatics and molecular dynamics simulations

Polymer ◽  
2021 ◽  
Vol 218 ◽  
pp. 123495
Author(s):  
Anas Karuth ◽  
Amirhadi Alesadi ◽  
Wenjie Xia ◽  
Bakhtiyor Rasulev
Keyword(s):  
Molecular Dynamics ◽  
Glass Transition ◽  
Molecular Dynamics Simulations ◽  
Amorphous Polymers ◽  
Dynamics Simulations

Glass Transition and Ultrasonic Relaxation in Polystyrene

1996 ◽  
Vol 455 ◽  
Author(s):  
A. Sahnoune ◽  
L. Piché
Keyword(s):  
Molecular Weight ◽  
Relaxation Time ◽  
Glass Transition ◽  
Low Temperatures ◽  
Relaxation Modulus ◽  
Low Molecular Weight ◽  
Relaxation Model ◽  
Fragility Index ◽  
Molecular Weights ◽  
Ultrasonic Relaxation

ABSTRACTWe present measurements of the glass transition and the ultrasonic relaxation modulus in a series of monodisperse polystyrenes. The temperature dependence of the modulus was analyzed using Havriliak-Negami relaxation model (HN) and Vogel-Tammann-Fulcher equation (VTF) for the relaxation time. The results allowed us to determine the fragility index, m, which decreases with increasing molecular weight, Mn. Furthermore, the relaxation time was found to saturate at high molecular weights and varies as Mnp, in the low molecular weight region. The exponent is p≈2 at high temperatures and p ≈ 7 at low temperatures close to Tg.

Dynamics of amorphous polymers near glass transition

1992 ◽  
Author(s):  
T. Kanaya ◽  
T. Kawaguchi ◽  
K. Kaji
Keyword(s):  
Glass Transition ◽  
Amorphous Polymers
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