Molecular weight dependence in a relaxation phenomenon at glassy state: Physical aging of polycarbonate

Polymer ◽  
2012 ◽  
Vol 53 (4) ◽  
pp. 895-896 ◽  
Author(s):  
Hidenori Soma ◽  
Shotaro Nishitsuji ◽  
Takashi Inoue
Keyword(s):  
Molecular Weight ◽  
Physical Aging ◽  
Glassy State ◽  
Relaxation Phenomenon ◽  
Molecular Weight Dependence

Molecular weight dependence of the physical aging of polycarbonate

Polymer ◽  
2019 ◽  
Vol 178 ◽  
pp. 121571
Author(s):  
Shotaro Nishitsuji ◽  
Yuki Watanabe ◽  
Hiroshi Ito ◽  
Masaru Ishikawa ◽  
Takashi Inoue ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Physical Aging ◽  
Molecular Weight Dependence

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.

Molecular weight dependence of the conformational phase transition and electroluminescence of diarylpolysilane diodes

2000 ◽  
Vol 88 (6) ◽  
pp. 3408-3413 ◽  
Author(s):  
Satoshi Hoshino ◽  
Kazuaki Furukawa ◽  
Keisuke Ebata ◽  
Ingo Breyl ◽  
Hiroyuki Suzuki
Keyword(s):  
Phase Transition ◽  
Molecular Weight ◽  
Molecular Weight Dependence

Composition and molecular-weight dependence of the glass transition in polystyrene-poly(2,6-dimethylphenylene ether) blends

Polymer ◽  
1988 ◽  
Vol 29 (12) ◽  
pp. 2235-2243 ◽  
Author(s):  
Marco Aurelio de Araujo ◽  
Reimund Stadler ◽  
Hans-Joachim Cantow
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Molecular Weight Dependence

Power law of molecular weight dependence of lateral growth rate of isotactic polypropylene

Polymer ◽  
2006 ◽  
Vol 47 (21) ◽  
pp. 7601-7606 ◽  
Author(s):  
Koji Yamada ◽  
Kaori Watanabe ◽  
Kiyoka Okada ◽  
Akihiko Toda ◽  
Masamichi Hikosaka
Keyword(s):  
Molecular Weight ◽  
Growth Rate ◽  
Power Law ◽  
Isotactic Polypropylene ◽  
Lateral Growth ◽  
Molecular Weight Dependence ◽  
Lateral Growth Rate
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