Effects of annealing above T g on the physical aging of quenched PLLA studied by modulated temperature FTIR

2018 ◽  
Vol 57 (3) ◽  
pp. 174-181 ◽  
Author(s):  
Valerio Di Lisio ◽  
Elisa Sturabotti ◽  
Iolanda Francolini ◽  
Antonella Piozzi ◽  
Andrea Martinelli
Keyword(s):  
Physical Aging ◽  
Modulated Temperature

scholarly journals Physical Aging Behavior of a Glassy Polyether

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 954
Author(s):  
Xavier Monnier ◽  
Sara Marina ◽  
Xabier Lopez de Pariza ◽  
Haritz Sardón ◽  
Jaime Martin ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Physical Aging ◽  
Glassy State ◽  
Aging Behavior ◽  
Scanning Calorimetry ◽  
Narrow Temperature Range ◽  
Glass Forming ◽  
Fast Scanning Calorimetry

The present work aims to provide insights on recent findings indicating the presence of multiple equilibration mechanisms in physical aging of glasses. To this aim, we have investigated a glass forming polyether, poly(1-4 cyclohexane di-methanol) (PCDM), by following the evolution of the enthalpic state during physical aging by fast scanning calorimetry (FSC). The main results of our study indicate that physical aging persists at temperatures way below the glass transition temperature and, in a narrow temperature range, is characterized by a two steps evolution of the enthalpic state. Altogether, our results indicate that the simple old-standing view of physical aging as triggered by the α relaxation does not hold true when aging is carried out deep in the glassy state.

scholarly journals Network Topology of the States Probed by a Glassy Polymer during Physical Aging

2019 ◽  
Vol 28 (6) ◽  
pp. 1900036
Author(s):  
Georgios Grigorios Vogiatzis ◽  
Lambèrt Cécile Angelo van Breemen ◽  
Markus Hütter
Keyword(s):  
Network Topology ◽  
Physical Aging ◽  
Glassy Polymer

Transport parameters and models of physical aging of additive polytricyclononene with SiMe3 groups

Polymer ◽  
2021 ◽  
Vol 217 ◽  
pp. 123447
Author(s):  
N. Belov ◽  
D. Nikolaeva ◽  
Yu Yampolskii
Keyword(s):  
Physical Aging ◽  
Transport Parameters
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