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The peculiar elongational viscosity of concentrated solutions of monodisperse PMMA in oligomeric MMA

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Abstract

Concentrated solutions of nearly monodisperse poly(methyl methacrylate), PMMA-270k and PMMA-86k, in oligo(methyl methacrylate), MMA o-4k and MMA o-2k, investigated by Wingstrand et al. (Phys Rev Lett 115:078302, 2015) and Wingstrand (2015) do not follow the linear-viscoelastic scaling relations of monodisperse polystyrenes (PS) dissolved in oligomeric styrene (Wagner in Rheol Acta 53:765–777, 2014a, in Non-Newtonian Fluid Mech 222:121–131, 2014b; Wagner et al. in J Rheol 59:1113–1130, 2015). Rather, PMMA-270k shows an attractive interaction with MMA, in contrast to the interaction of PMMA-86k and MMA. This different behavior can be traced back to different tacticities of the two polymers. The attractive interaction of PMMA-270k with o-4k creates pseudo entanglements, which increase the interchain tube pressure, and therefore, the solution PMMA-270k/o-4k shows, as reported by Wingstrand et al. (Phys Rev Lett 115:078302, 2015), qualitatively a similar scaling of the elongational viscosity with \( {\left(\dot{\varepsilon}{\tau}_R\right)}^{-1/2} \) as observed for polystyrene melts. For the solution PMMA-270/o-2k, this effect is only seen at the highest elongation rates investigated. The elongational viscosity of PMMA-86k dissolved in oligomeric MMA is determined by the Rouse time of the melt, as in the case of polystyrene solutions.

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Authors and Affiliations

  1. Polymer Engineering/Polymer Physics, Berlin Institute of Technology (TU Berlin), Fasanenstrasse 90, 10623, Berlin, Germany

    Manfred H. Wagner

  2. Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800, Kongens Lyngby, Denmark

    Sara L. Wingstrandt

  3. Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA, 19104, USA

    Nicolas J. Alvarez

  4. Department of Chemical Engineering, Guangdong Technion–Israel Institute of Technology (GTIIT), Shantou, 515063, China

    Esmaeil Narimissa

  5. Department of Chemical Engineering, Technion–Israel Institute of Technology (IIT), Technion City, 32000, Haifa, Israel

    Esmaeil Narimissa

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  1. Manfred H. Wagner
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  2. Sara L. Wingstrandt
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  3. Nicolas J. Alvarez
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  4. Esmaeil Narimissa
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Correspondence to Manfred H. Wagner.

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Wagner, M.H., Wingstrandt, S.L., Alvarez, N.J. et al. The peculiar elongational viscosity of concentrated solutions of monodisperse PMMA in oligomeric MMA. Rheol Acta 57, 591–601 (2018). https://doi.org/10.1007/s00397-018-1098-4

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