Melting Kinetics of Superheated Polymer Crystals Examined by Isothermal and Nonisothermal Fast Scanning Calorimetry

2021 ◽  
Vol 54 (18) ◽  
pp. 8770-8779
Author(s):  
Akihiko Toda ◽  
René Androsch ◽  
Christoph Schick
Keyword(s):  
Scanning Calorimetry ◽  
Fast Scanning Calorimetry ◽  
Polymer Crystals ◽  
Melting Kinetics ◽  
Kinetics Of

Superheated Melting Kinetics of Metastable Chain-Folded Polymer Crystals

2018 ◽  
Vol 18 (6) ◽  
pp. 3637-3643 ◽  
Author(s):  
Akihiko Toda ◽  
Ken Taguchi ◽  
Koji Nozaki ◽  
Tatsuya Fukushima ◽  
Hironori Kaji
Keyword(s):  
Polymer Crystals ◽  
Melting Kinetics ◽  
Kinetics Of

Computer simulation of the melting kinetics of polymer crystals under condition of modulated temperature

1999 ◽  
Vol 330 (1-2) ◽  
pp. 75-83 ◽  
Author(s):  
Akihiko Toda ◽  
Takeshi Arita ◽  
Chiyoko Tomita ◽  
Masamichi Hikosaka
Keyword(s):  
Computer Simulation ◽  
Modulated Temperature ◽  
Polymer Crystals ◽  
Melting Kinetics ◽  
Kinetics Of

Heat of fusion of polymer crystals by fast scanning calorimetry

Polymer ◽  
2017 ◽  
Vol 126 ◽  
pp. 240-247 ◽  
Author(s):  
Peggy Cebe ◽  
David Thomas ◽  
John Merfeld ◽  
Benjamin P. Partlow ◽  
David L. Kaplan ◽  
...  
Keyword(s):  
Heat Of Fusion ◽  
Scanning Calorimetry ◽  
Fast Scanning Calorimetry ◽  
Polymer Crystals

scholarly journals Melting Kinetics of Nascent Poly(tetrafluoroethylene) Powder

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 791
Author(s):  
Fotis Christakopoulos ◽  
Enrico Troisi ◽  
Theo A. Tervoort
Keyword(s):  
Kinetic Model ◽  
Heating Rate ◽  
Melting Temperature ◽  
Melting Behavior ◽  
Slow Heating ◽  
Heating Rates ◽  
Scanning Calorimetry ◽  
Exponential Factor ◽  
Melting Kinetics ◽  
Kinetics Of

The melting behavior of nascent poly(tetrafluoroethylene) (PTFE) was investigated by way of differential scanning calorimetry (DSC). It is well known that the melting temperature of nascent PTFE is about 344 ∘ C, but reduces to 327 ∘ C for once molten material. In this study, the melting temperature of nascent PTFE crystals was found to strongly depend on heating rate, decreasing considerably for slow heating rates. In addition, during isothermal experiments in the temperature range of 327 ∘ C < T < 344 ∘ C, delayed melting of PTFE was observed, with complete melting only occurring after up to several hours. The melting kinetics of nascent PTFE were analyzed by means of the isoconversional methodology, and an apparent activation energy of melting, dependent on the conversion, was determined. The compensation effect was utilized in order to derive the pre-exponential factor of the kinetic model. The numerical reconstruction of the kinetic model was compared with literature models and an Avrami-Erofeev model was identified as best fit of the experimental data. The predictions of the kinetic model were in good agreement with the observed time-dependent melting of nascent PTFE during isothermal and constant heating-rate experiments.

scholarly journals Nucleation and crystallization kinetics of polyamide 12 investigated by fast scanning calorimetry

2021 ◽  
Author(s):  
Rui Zhang ◽  
Katalee Jariyavidyanont ◽  
Mengxue Du ◽  
Evgeny Zhuravlev ◽  
Christoph Schick ◽  
...  
Keyword(s):  
Crystallization Kinetics ◽  
Scanning Calorimetry ◽  
Polyamide 12 ◽  
Fast Scanning Calorimetry ◽  
Kinetics Of

Melting Kinetics of Polymer Crystals with an Entropic Barrier

2008 ◽  
Vol 41 (1) ◽  
pp. 120-127 ◽  
Author(s):  
Akihiko Toda ◽  
Isao Kojima ◽  
Masamichi Hikosaka
Keyword(s):  
Polymer Crystals ◽  
Melting Kinetics ◽  
Kinetics Of
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