%0 Journal Article
%T Friction of Polymers: from PDMS Melts to PDMS Elastomers
%J -
%D 2018
%R https://doi.org/10.1021/acsmacrolett.7b00842
%X The slip behavior of polydimethylsiloxane (PDMS) polymer melts flowing on weakly adsorbing surfaces made of short nonentangled PDMS chains densely end-grafted to silica has been characterized. For high enough shear rates, slip lengths proportional to the bulk fluid viscosity have been observed, in agreement with Navier¡¯s interfacial equation and demonstrating that the interfacial Navier¡¯s friction coefficient is a local quantity, independent of the polymer molecular weight. Comparing the interfacial shear stresses deduced from these measured slip lengths to available friction stress measured for cross-linked PDMS elastomers, we further demonstrate the local character of the friction coefficient and compare its value to the monomer¨Cmonomer friction
%U https://pubs.acs.org/doi/10.1021/acsmacrolett.7b00842