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Webinar: Subglass Relaxation in Polymer Glasses: Insights From Multi-Scale Atomistic Simulations

Event Details:

  • Date:          Tuesday, 19 October 2021
  • Time:         Starts: 16:00
  • Venue:       Live streaming of the discussion will be available on Zoom (Password: VsSCz1).
  • Speaker:    Dr George Vogiatzis, Postdoctoral Researcher School of Chemical Engineering, National Technical University of Athens



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 CaSToRC, HPC National Competence Centre
 invites you to the EuroCC and SimEA Online Seminar Series

 
The webinar will be in English and the live stream is open to the public.
Live streaming of the discussion will be available on Zoom (Password: VsSCz1).
Images and/or recordings of our open public events may be used by The Cyprus Institute for dissemination purposes including print and digital media such as websites, press-releases, social media, and live streaming.

 


                                                                                                             

Abstract

Subglass Relaxation in Polymer Glasses: Insights From Multi-Scale Atomistic SimulationsWhile the aging of polymer glasses puts a burden on the long-term functionality of products made out of them, a bottom-up (i.e., molecular-level based) understanding of the parallel aging mechanisms acting is still missing. Since aging mechanisms affect the polymer at the molecular scale, investigation of the change in macroscale properties using atomistically-detailed molecular simulations can provide crucial insights into the processes of physical and chemical aging (e.g., exposure of polymers to aggressive chemicals), as well as UV-induced degradation. By introducing a two-level approach to the treatment of aging, i.e., discerning between individual low-level events and collective phenomena, we have set up a unified description of the time-evolution of a physically aging specimen exposed to reactive chemicals. The first results have been encouraging, i.e., the prediction, from atomistic simulations, of the time-scales of the subglass relaxations of polystyrene and the calculation of diffusivity of reactant polymers within a polymer matrix. However, the goals of incorporating chemical reactions and irradiation-induced degradation are still challenging.

Acknowledgments: Financial support by the Dutch Polymer Institute (DPI), project no. 745ft14 and no. 820.

 

About the Speaker


Dr Georgios Grigorios Vogiatzis

Dr. Georgios Grigorios Vogiatzis completed his PhD degree in Chemical Engineering at the National Technical University of Athens in 2015. Thereafter, he held several postdoctoral research positions, initially at the National Technical University of Athens (5/2015 - 8/2016) and thereafter at Eindhoven University of Technology (9/2016 - 12/2019). Currently, Dr. Vogiatzis is a Postdoctoral Researcher at the School of Chemical Engineering, National Technical University of Athens (January 2020 - today), as well as a visiting Postdoctoral Researcher at the Department of Mechanical Engineering, Eindhoven University of Technology.

 

 


 

Download the Autumn 2021 Online EuroCC & SimEA Seminar Series Programme here.


EuroCC Simea Seminar Series 2 



 

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Additional Info

  • Date: Tuesday, 19 October 2021
  • Time: Starts: 16:00
  • Speaker: Dr. George Vogiatzis, School of Chemical Engineering, National Technical University of Athens