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Article Dans Une Revue Macromolecules Année : 2020

Using Mw dependence of surface dynamics of glassy polymers to probe the length scale of free surface mobility

Yu Chai
  • Fonction : Auteur
Thomas Salez

Résumé

We describe a series of surface levelling experiments in glassy polystyrene (PS) of varying molecular weight. The evolution through a mobile surface layer is described by the glassy thin film equation that was introduced and used in a previous work. Excellent agreement with the data is achieved, with surface mobility as the single free parameter. Different molecular-weight dependencies in mobility are then observed above and below the glass transition. The results are discussed in terms of surface-chain anchoring in the bulk matrix, and the length scale for surface mobility.
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Dates et versions

hal-02271644 , version 1 (04-09-2019)
hal-02271644 , version 2 (19-02-2020)

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Yu Chai, Thomas Salez, James A Forrest. Using Mw dependence of surface dynamics of glassy polymers to probe the length scale of free surface mobility. Macromolecules, 2020, 53 (3), pp.1084. ⟨hal-02271644v2⟩

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