Effect of Finite Extensibility on Nonlinear Extensional Rheology of Polymer Melts

Morelly, Samantha L.; Palmese, Luisa; Watanabe, Hiroshi; Alvarez, Nicolas J.

doi:10.1021/acs.macromol.8b02319

Cited by 36 publications

(70 citation statements)

References 36 publications

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“…The nonlinear elongational stress data of polystyrene (PS), polytert-butylstyrene (PtBS) and polymethyl-methacrylate (PMMA) considered in this study were taken from various pieces of literature (Bach et al 2003a;Huang et al 2013b;Morelly et al 2019). The PS samples (PS200k, PS-285k) and the PtBS sample (PtBS-301k) were prepared by anionic polymerization.…”

Section: Methodsmentioning

confidence: 99%

“…The PS samples (PS200k, PS-285k) and the PtBS sample (PtBS-301k) were prepared by anionic polymerization. PMMA samples (PMMA-86k and PMMA-100k) were purchased from Polymer Standards Service GmbH and used as received (Morelly et al 2019). The molecular characteristics of the polymer melts are summarized in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…While there seems to be general agreement on the universality of the linear viscoelastic behaviour of well-entangled monodisperse linear polymer melts and solutions based on only three material parameters (plateau modulus, characteristic time and the number of entanglements), this universality is lost in the nonlinear viscoelastic regime as especially apparent in elongational flow, where not only differences in the rheology of melts and solutions became apparent but also different signatures of different chemistries are reported (Morelly et al 2019). However, we note that Fetters et al (1999b) collected data for a large number of polymers and showed that the ratio of the entanglement molar mass M em to the critical molar mass of M cm is chemistry dependent.…”

Section: Introductionmentioning

confidence: 98%

“…based exclusively on the LVE characterization and the Rouse time, is maintained also for polymer melts with different chemical constituents. Recently, Morelly et al (2019) compared the nonlinear elongational viscosity behaviour of polystyrene (PS) with melts of poly(tert-butylstyrene) (PtBS) and poly(methyl-methacrylate) (PMMA). While the normalized LVE of monodisperse linear polymer melts is exclusively dependent on the number of entanglements, they found different elongational scaling of the elongational viscosity for different chemistries.…”

Section: Introductionmentioning

confidence: 99%

“…While the normalized LVE of monodisperse linear polymer melts is exclusively dependent on the number of entanglements, they found different elongational scaling of the elongational viscosity for different chemistries. In this article, we analyse the elongational viscosity data of well-defined entangled polymer melts by Bach et al (2003a), Huang et al (2013b) and Morelly et al (2019), obtained by the filament-stretching rheometer with local strain and strain rate control and compare data with the predictions of the EIP model for nonlinear elongational rheology of monodisperse entangled polymer melts.…”

Section: Introductionmentioning

confidence: 99%

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Elongational viscosity scaling of polymer melts with different chemical constituents

2021

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Morelly et al. (Macromolecules 52:915-922, 2019) reported transient and steady-state elongational viscosity data of monodisperse linear polymer melts obtained by filament-stretching rheometry with locally controlled strain and strain rate and found different power law scaling of the elongational viscosities of polystyrene, poly(tert-butylstyrene) and poly(methyl-methacrylate). Very good agreement is achieved between data and predictions of the extended interchain pressure (EIP) model (Narimissa et al. J. Rheol. 64, 95-110 (2020)), based solely on linear viscoelastic characterization and the Rouse time τR of the melts. The analysis reveals that both the normalized elongational viscosity and the normalized elongational stress are dependent on the number of entanglements (Z) and the ratio of entanglement molar mass Mem to critical molar mass Mcm of the melts in the linear viscoelastic regime through $$ {\eta}_E^0/\left({G}_N{\tau}_R\right)\propto {\left({M}_{\mathrm{em}}/{M}_{\mathrm{cm}}\right)}^{2.4}{Z}^{1.4} $$ η E 0 / G N τ R ∝ M em / M cm 2.4 Z 1.4 and $$ {\sigma}_E^0/{G}_N\propto {\left({M}_{\mathrm{em}}/{M}_{\mathrm{cm}}\right)}^{2.4}{Z}^{1.4} Wi $$ σ E 0 / G N ∝ M em / M cm 2.4 Z 1.4 W i , while in the limit of fast elongational flow with high Weissenberg number $$ Wi={\tau}_R\dot{\varepsilon} $$ Wi = τ R ε ̇ , both viscosity and stress become independent of Z and Mem/Mcm, and approach a scaling which depends only on Wi, i.e. ηE/(GNτR) ∝ Wi−1/2 and σE/GN ∝ Wi1/2. When expressed by an effective power law, the broad transition from the linear viscoelastic to the high Wi regime leads to chemistry-dependent scaling at intermediate Wi depending on the number of entanglements and the ratio between entanglement molar mass and critical molar mass.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Elongational viscosity scaling of polymer melts with different chemical constituents

2021

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Novel High‐Speed Elongation Rheometer

Bier

Arne

Schubert

2022

Macro Materials & Eng

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The elongational viscosity of polymers can be determined by utilizing different devices such as extensional rheometer after Sentmanat (SER), oil bath rheometer after Meissner or tensile rheometer after Münstedt (MTR), with strain rates up to 10 s–1. Although these investigations are already complex, they do not depict real fiber spinning processes where higher elongation strain rates occur. Therefore, a novel method is developed to calculate the elongational viscosity of polymers during the fiber spinning process. To reduce the complexity of the system, two polymethylmethacrylates (PMMAs) with different molar masses are investigated using a capillary rheometer to exclude crystallization effects. The diameter of the polymeric strand is determined via a high‐speed camera from the die exit to the aspirator. In addition, simulations are carried out to describe the temperature profile of the polymeric strand along the spinline. It is possible to determine the elongational viscosity of the polymers in dependence of temperature and strain rates up to 100 s–1, by calibration of the force in an aerodynamic stretching device (aspirator).

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On the universality in the extensional rheology of monodisperse polymer melts and oligomer dilutions thereof

2019

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Effect of Finite Extensibility on Nonlinear Extensional Rheology of Polymer Melts

Cited by 36 publications

References 36 publications

Elongational viscosity scaling of polymer melts with different chemical constituents

Elongational viscosity scaling of polymer melts with different chemical constituents

Novel High‐Speed Elongation Rheometer

On the universality in the extensional rheology of monodisperse polymer melts and oligomer dilutions thereof

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