Interactive shear and extensional rheology—25 years of IRIS software

L Poh, E Narimissa, MH Wagner, HH Winter - Rheologica Acta, 2022 - Springer
Over the past 25 years, IRIS has become an integral resource in materials laboratories
around the world, bringing together stimulating communities of rheology experimentalists …

Review on tube model based constitutive equations for polydisperse linear and long-chain branched polymer melts

E Narimissa, MH Wagner - Journal of Rheology, 2019 - pubs.aip.org
Rheological equations of state are of great importance for characterization of polymer melts
and for simulation of polymer processing. This concise review considers tube model based …

Modeling elongational viscosity and brittle fracture of 10 polystyrene Pom-Poms by the hierarchical molecular stress function model

V Hirschberg, MG Schußmann, MC Röpert, M Wilhelm… - Rheologica Acta, 2023 - Springer
A Pom-Pom polymer with qa side chains of molecular weight M w, a at both ends of a
backbone chain of molecular weight M w, b is the simplest branched polymer topology. Ten …

Characterization of industrial low-density polyethylene: a thermal, dynamic mechanical, and rheological investigation

L Poh, Q Wu, Y Chen, E Narimissa - Rheologica Acta, 2022 - Springer
The study of commercial low-density polyethylenes (LDPEs) has always focused on the
effects of the molecular architecture of the polymer on its shear and extensional rheological …

[HTML][HTML] Hyperstretching in elongational flow of densely grafted comb and branch-on-branch model polystyrenes

V Hirschberg, L Faust, M Abbasi, Q Huang… - Journal of …, 2024 - pubs.aip.org
Strain hardening of long-chain branched polymers in elongational flow occurs due to the
stretch of the backbone chain between branch points. With an increasing number of side …

Modelling elongational viscosity overshoot and brittle fracture of low-density polyethylene melts

MH Wagner, E Narimissa, L Poh, Q Huang - Rheologica Acta, 2022 - Springer
Abstract The Hierarchical Multi-mode Molecular Stress Function (HMMSF) model predicts
the elongational and multiaxial extensional viscosities of polydisperse linear polymer melts …

Experimental validation of the hierarchical multi-mode molecular stress function model in elongational flow of long-chain branched polymer melts

MH Wagner, V Hirschberg - Journal of Non-Newtonian Fluid Mechanics, 2023 - Elsevier
Abstract The Hierarchical Multi-mode Molecular Stress Function (HMMSF) model predicts
the elongational start-up viscosity of long-chain branched (LCB) polymer melts quantitatively …

Analysis of bubble coalescence and determination of the bubble radius for long‐chain branched poly (ethylene terephthalate) melt foaming with a pressure balanced …

Y Ge, J Lu, T Liu - AIChE Journal, 2020 - Wiley Online Library
A pressure balanced bubble‐growth (PBB) model was proposed to analyze bubble
coalescence and determine the bubble radius for the melt foaming of long‐chain branched …

Rheological link between polymer melts with a high molecular weight tail and enhanced formation of Shish-Kebabs

SL Wingstrand, B Shen, JA Kornfield… - ACS Macro …, 2017 - ACS Publications
Presence of an ultra high molecular weight (UHMw) fraction in flowing polymer melts is
known to facilitate formation of oriented crystalline structures significantly. The UHMw …

Numerical simulation on bubble wall shape evolution and uniformity in poly (ethylene terephthalate) foaming process

Y Ge, T Liu - Chemical Engineering Science, 2021 - Elsevier
The rheological behaviors of commercial foaming-grade poly (ethylene terephthalate)(PET)
were measured and modeled, on the basis of which quantitative simulations on the …