Direct Molecular Evidence of the Origin of Slip of Polymer Melts on Grafted Brushes

Alexis Chennevière, Fabrice Cousin, François Boué, Eric Drockenmuller, Kenneth R. Shull, Liliane Léger, Frédéric Restagno*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Neutron reflectivity has been used to investigate the effect of shear on the conformation of hydrogenated polystyrene chains end-grafted on a silicon wafer and covered by a deuterated polystyrene melt, in the grafting regime where the grafted chains at equilibrium extend in the bulk up to their radius of gyration. An experimental setup has been built to shear the samples above their glass transition temperature and then quench them rapidly after the shear. The flow-induced distorted conformation of the end-tethered chains was characterized by neutron reflectivity. We show that the effect of the shear is a decoupling between the grafted chains and the bulk chains which leads to a strong slip of the polymer melt at the solid interface.

Original languageEnglish (US)
Pages (from-to)2348-2353
Number of pages6
JournalMacromolecules
Volume49
Issue number6
DOIs
StatePublished - Mar 22 2016

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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