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Main Title: Modeling elongational viscosity and brittle fracture of polystyrene solutions
Author(s): Wagner, Manfred H.
Narimissa, Esmaeil
Poh, Leslie
Shahid, Taisir
Type: Article
Language Code: en
Abstract: Elongational viscosity data of well-characterized solutions of 3–50% weight fraction of monodisperse polystyrene PS-820k (molar mass of 820,000 g/mol) dissolved in oligomeric styrene OS8.8 (molar mass of 8800 g/mol) as reported by André et al. (Macromolecules 54:2797–2810, 2021) are analyzed by the Extended Interchain Pressure (EIP) model including the effects of finite chain extensibility. Excellent agreement between experimental data and model predictions is obtained, based exclusively on the linear-viscoelastic characterization of the polymer solutions. The data were obtained by a filament stretching rheometer, and at high strain rates and lower polymer concentrations, the stretched filaments fail by rupture before reaching the steady-state elongational viscosity. Filament rupture is predicted by a criterion for brittle fracture of entangled polymer liquids, which assumes that fracture is caused by scission of primary C-C bonds of polymer chains when the strain energy reaches the bond-dissociation energy of the covalent bond (Wagner et al., J. Rheology 65:311–324, 2021).
Issue Date: 14-Jun-2021
Date Available: 13-Sep-2021
DDC Class: 600 Technik, Technologie
Subject(s): polymer melt
polymer solution
chain scission
EIP model
interchain pressure
finite extensibility
Sponsor/Funder: TU Berlin, Open-Access-Mittel – 2021
Journal Title: Rheologica Acta
Publisher: Springer Nature
Publisher Place: Heidelberg
Volume: 60
Publisher DOI: 10.1007/s00397-021-01277-1
Page Start: 385
Page End: 396
EISSN: 1435-1528
ISSN: 0035-4511
Appears in Collections:FG Polymertechnik und Polymerphysik » Publications

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