Role of molecular architecture and temperature on extrusion melt flow instabilities of two industrial LLDPE and LDPE polyethylenes investigated by capillary rheology …

CK Georgantopoulos, MK Esfahani… - Journal of Applied …, 2023 - Wiley Online Library
The characteristic time periodicity τ* and the spatial characteristic wavelength λ of extrusion
flow instabilities of a linear and a branched commercial polyethylene (PE) are characterized …

Modeling the spatial characteristics of extrusion flow instabilities for styrene-butadiene rubbers: Investigating the influence of molecular weight distribution, molecular …

CK Georgantopoulos, MK Esfahani, C Botha… - Physics of …, 2021 - pubs.aip.org
The extrusion flow instabilities of three commercial styrene-butadiene rubbers (SBR) are
investigated as a function of molecular weight distribution (MWD); molecular architecture …

Mechano‐Optical Characterization of Extrusion Flow Instabilities in Styrene‐Butadiene Rubbers: Investigating the Influence of Molecular Properties and Die Geometry

CK Georgantopoulos, MK Esfahani… - Macromolecular …, 2021 - Wiley Online Library
The extrusion flow instabilities of two commercial styrene‐butadiene rubbers are
investigated as they vary in isomer content (1, 4‐cis, 1, 4‐trans, and 1, 2 conformation) of the …

Melt Instability Identification Using Unsupervised Machine Learning Algorithms

A Gansen, J Hennicker, C Sill, J Dheur… - Macromolecular …, 2023 - Wiley Online Library
In industrial extrusion processes, increasing shear rates can lead to higher production rates.
However, at high shear rates, extruded polymers and polymer compounds often exhibit melt …

Experimental separation of the onset of slip and sharkskin melt instabilities during the extrusion of silica-filled, styrene–butadiene rubber compounds

A Gansen, M Řehoř, C Sill, P Polińska, S Westermann… - Rheologica Acta, 2023 - Springer
The flow curves of polymers often reveal the onset of melt instabilities such as sharkskin,
stick–slip, or gross melt fracture, in order of increasing shear rates. The focus of this work lies …

[HTML][HTML] A comparison of constitutive models for describing the flow of uncured styrene-butadiene rubber

M Řehoř, A Gansen, C Sill, P Polińska… - Journal of Non …, 2020 - Elsevier
Uncured styrene-butadiene rubber (SBR) can be modelled as a viscoelastic material with at
least two different relaxation mechanisms. In this paper we compare multi-mode constitutive …

Bayesian calibration of a model of polymer die swell using data from a laser–based measurement system

J HENNICKER, A GANSEN, S Clemens, N Verdon… - 2024 - orbilu.uni.lu
Our goal is to produce a predictive model linking apparent shear rate with polymer die swell
for a single extrusion system. We propose the use of a Kennedy O'Hagan-type approach for …

Surface instability detection in highly-filled biocomposites from inline imaging during extrusion

S Pashazadeh, T Moberg, A Brolin… - AIP Conference …, 2023 - pubs.aip.org
The processing of wood fiber biocomposites, and in particular, the extrusion, is
accompanied by multiple challenges, among which agglomeration, entanglement, slip, or …

[引用][C] Development of Rheometric Tools to Investigate and Model Extrusion Flow Instabilities

C Georgantopoulos - 2023 - Dissertation, Karlsruhe, Karlsruher …