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Article Dans Une Revue ACS Macro Letters Année : 2020

Rouse 2D diusion of polymer chains in low density precursor films of polybutadiene melts

Résumé

We took advantage of pseudo-partial wetting to promote the spreading of precursor films whose surface density smoothly decays to zero away from a sessile droplet. By following the spreading dynamics of semi-dilute precursor films of polybutadiene melts on silicon wafers, we measure molecular diusion coefficients for different molar masses and temperatures. For homopolymers, chains follow a thermally activated 2D Rouse diffusion mechanism, with an activation energy revealing polymer segments interactions with the surface. This Rouse model is generalized to chains with specific terminal groups.
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Dates et versions

hal-02571015 , version 1 (12-05-2020)
hal-02571015 , version 2 (27-05-2020)

Identifiants

Citer

Claire Schune, Marc Yonger, Mohamed Hanafi, Jürgen Thiel, Laurent Guy, et al.. Rouse 2D diusion of polymer chains in low density precursor films of polybutadiene melts. ACS Macro Letters, In press, pp.843-848. ⟨10.1021/acsmacrolett.0c00144⟩. ⟨hal-02571015v2⟩
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