https://doi.org/10.1007/s100510050611
New concepts for the slippage of an entangled polymer melt at a grafted solid interface
Collège de France,
Physique de la Matière Condensée (
URA 792 du CNRS) ,
11 place Marcelin Berthelot,
75231 Paris Cedex 05, France
Received:
20
February
1998
Revised:
11
June
1998
Accepted:
4
August
1998
Published online: 15 January 1999
Molecular models of interfacial friction between an entangled melt and a compatible polymer brush (irreversibly grafted chains) are discussed. Progress since the 1992 model by Brochard and de Gennes is described, including the impact of the experimental evidence obtained by Durliat (thesis, 1997). A new, more realistic description of interfacial friction is adapted from the bulk tube renewal mechanism. It justifies some earlier results more precisely. It additionally predicts a progressive thinning of the grafted layer when the melt velocity exceeds some threshold value. An outline of the expected chain behaviour at very high grafting densities is given. It includes topological effects similar to combing.
PACS: 83.50.Lh – Interfacial and free surface flows; slip / 83.20.Fk – Reptation theories / 36.20.Ey – Conformation (statistics and dynamics)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
