Linear Stress Relaxation and Probe Reorientation: Comparison of the Segmental Dynamics of Two Glassy Polymers during Physical Aging

2019 ◽  
Vol 52 (21) ◽  
pp. 8177-8186 ◽  
Author(s):  
Josh Ricci ◽  
Trevor Bennin ◽  
Enran Xing ◽  
M. D. Ediger
Keyword(s):  
Stress Relaxation ◽  
Physical Aging ◽  
Glassy Polymers ◽  
Segmental Dynamics

Bulk Moduli from Physical Aging and Stress Relaxation Data

1998 ◽  
pp. 447-448
Author(s):  
J. Vernel ◽  
M. J. Kubát ◽  
R. W. Rychwalski ◽  
J. Kubat
Keyword(s):  
Stress Relaxation ◽  
Physical Aging ◽  
Relaxation Data

Effect of Adjacent Rubbery Layers on the Physical Aging of Glassy Polymers

2013 ◽  
Vol 46 (24) ◽  
pp. 9806-9817 ◽  
Author(s):  
Phillip M. Rauscher ◽  
Justin E. Pye ◽  
Roman R. Baglay ◽  
Connie B. Roth
Keyword(s):  
Physical Aging ◽  
Glassy Polymers

scholarly journals Predicting plasticity‐controlled failure of glassy polymers: Influence of stress‐accelerated progressive physical aging

2019 ◽  
Vol 57 (19) ◽  
pp. 1300-1314 ◽  
Author(s):  
Coen C. W. J. Clarijs ◽  
Marc J. W. Kanters ◽  
Marco J. Erp ◽  
Tom A. P. Engels ◽  
Leon E. Govaert
Keyword(s):  
Physical Aging ◽  
Glassy Polymers

Changes in Elastic and Viscoelastic Properties of Poly(Methyl methacrylate) by Physical Aging

2011 ◽  
Vol 314-316 ◽  
pp. 914-917
Author(s):  
Wen Bo Luo ◽  
Chu Hong Wang ◽  
Xiu Liu ◽  
Qiang Shen
Keyword(s):  
Aging Time ◽  
Viscoelastic Properties ◽  
Physical Aging ◽  
Creep Compliance ◽  
Aging Effect ◽  
Glassy Polymers ◽  
Time Range ◽  
Asymptotic Values ◽  
Constant Rate ◽  
Linear Manner

The influence of physical aging on mechanical properties of glassy polymers was investigated in this paper. After annealing above Tg to release the previous thermal and stress history, the polymethyl methacrylate (PMMA) samples were quenched to 27°C, aged for various times (ta), and were then stretched at the same temperature by two ways: (1) step stresses with four different magnitudes varying from 15MPa to 30MPa; (2) constant rate stretch up to fracture. The physical aging effect was monitored by measuring the initial instantaneous elastic modulus (E) and the fracture strength (σf) from the stress-strain curves as a function of ta up to 1368h. It is shown that both E and σf of the material increase with aging time and approach to their asymptotic values, which satisfy the KWW rule, while the isochronous creep compliance decreases with log ta in a linear manner within the aging time range considered in this paper.

Effect of physical aging on stress relaxation of poly(methyl methacrylate)

1981 ◽  
Vol 21 (14) ◽  
pp. 940-942 ◽  
Author(s):  
M. Cizmecioglu ◽  
R. F. Fedors ◽  
S. D. Hong ◽  
J. Moacanin
Keyword(s):  
Stress Relaxation ◽  
Methyl Methacrylate ◽  
Physical Aging ◽  
Poly Methyl Methacrylate
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