Interdisciplinary Lecture by Prof. Esmaeil Narimissa (GTIIT, ChE)

Title

Annual Report on the Progress in Polymer Science in GTIIT

Speaker

Prof. Esmaeil Narimissa (GTIIT, ChE)

Host

Prof. Kai Huang (GTIIT, Chemistry)

Date & Time

Mar. 30 2022, Wednesday, 11:00am-12:00pm

Location

E311 (Education Building, 3rd floor)

Language

English

Pizza served after the lecture

Abstract

Polymer Physics Lab of GTIIT was completed in February 2021. This lab enables us to conduct thermal, mechanical, and shear/extensional rheometric experiments on processed (extruded/moulded) and unprocessed (virgin/solution) polymeric materials.

In 2021-2, we explored the (i) relationship between degree of branching, and polydispersity with shear and extensional deformation of high density polyethylene (HDPE) melt; (ii) uniaxial extensional and shear flow analysis of low-viscosity melts; (iii) effect of chemical constituents on elongational viscosity of monodisperse melts; (iv) finite extensibility (i.e., FENE effect) and brittle fracture of monodisperse and bidisperse polymers during elongational flow; (v) thermal and thermo-oxidative degradation of polyethylene; (vi)  stress-overshoot during extensional flow of low density polyethylene (LDPE); and (vii) dynamic mechanical analysis (DMA) and extreme-rate shear flow analysis of different grades of LDPE. Currently, the deformation of supramolecular polymers with reversible hydrogen-bonded moieties and elongational brittle fracture of LDPE melt are under investigation.

In this seminar, the aforementioned series of experimental and theoretical studies on industrial grade (e.g., low/high density polyethylene, LDPE, and HDPE) and research grade (e.g., monodisperse polymer solutions/melts) polymers will be presented. This work was supported by the Ministry of Science and Technology of China (Grant no.:  QN2021030003L)

Related publications:

1. Poh L., Li B., Yu W., Narimissa E.*, and Wagner M.H., Modelling of nonlinear extensional and shear rheology of low-viscosity polymer melts. Eng. Sci., 1–10 (2021). Doi: 10.1002/pen.25637
2. Narimissa E.*, Poh L., and Wagner M.H., Elongational viscosity scaling of polymer melts with different chemical constituents. Rheologica Acta, (2021). doi: 10.1007/s00397-021-01261-9
3. Poh L., Narimissa E.*, and Wagner M.H., Modelling of Elongational Flow of HDPE Melts by Hierarchical Multi-Mode Molecular Stress Function Model. Polymers, 13, 19 (2021). doi: 10.3390/polym13193217
4. Wagner M.H., Narimissa E.*, and Huang Q., Scaling relations for brittle fracture of entangled polystyrene melts and solutions in elongational flow. Journal of Rheology, 65, 3 (2021). doi: 10.1122/8.0000184
5. Poh L., Narimissa E., Wagner MH., Winter H.H., Interactive Shear and Extensional Rheology – 25 years of IRIS Software, Rheologica Acta (2022). doi: 10.1007/s00397-022-01331-6
6. Wagner M., Narimissa E.*, Poh L., and Shahid T.: Modelling Elongational Viscosity and Brittle Fracture of Polystyrene Solutions, Rheologica Acta (2021). doi: 10.1007/s00397-021-01277-1
7. Wagner M.H., Narimissa E.*, and Shahid T., Elongational viscosity and brittle fracture of bidisperse blends of a high and several low molar mass polystyrene. Rheologica Acta, (2021). doi: 10.1007/s00397-021-01304-1
8. Wagner M.H. and Narimissa E.*, A new perspective on monomeric friction reduction in fast elongational flows of polystyrene melts and solutions. Journal of Rheology, 65, 6 (2021). doi: 10.1122/8.0000345
9. Wagner MH., Narimissa E.*, Poh L., Huang Q., Modelling Elongational Viscosity Overshoot and Brittle Fracture of Low-Density Polyethylene Melts, Rheologica Acta (2022), doi: 10.1007/s00397-022-01328-1

Bio

Esmaeil Narimissa is Technion Assist. Professor of Chemical Engineering at the Guangdong Technion Israel Institute of Technology. He received his BEng from Monash University, and his PhD in Chemical Engineering from RMIT University, Australia (2014).  Dr Narimissa began his Postdoctoral Fellowship in the field of Polymer Physics/Engineering in 2014 at Technical University of Berlin under the supervision of the distinguished Professor Manfred H. Wagner, where they developed a set of novel constitutive equations in Polymer Rheology; i.e. Hierarchical Multi-mode Molecular Stress Function (HMMSF) model, to predict the shear and extensional flow behaviours of Linear and Long-Chain Branched (LCB) polymer melts. His research findings have been published in top Fluid Mechanics and Polymer journals: Journal of Rheology, Rheologica Acta, Polymer etc. His current research is on the study of fracture in extensional flow of well-characterised polymers with different architecture, and polydispersity, as well as the fabrication and rheological quantification of self-exfoliating nanocomposites.