Intrinsic viscoelasticity in thin high-molecular-weight polymer films

Autor: Katherine R. Thomas, Ullrich Steiner, Frédéric Wintzenrieth, Xiaoyuan Sheng
Rok vydání: 2014
Předmět:
Zdroj: Physical Review E. 89
ISSN: 1550-2376
1539-3755
DOI: 10.1103/physreve.89.062604
Popis: The rheology of 44-75-nm-thick polystyrene films were probed by destabilization in an electric field. The non-cross-linked films showed the hallmark of viscoelasiticy; they exhibited elastic behavior at high shear rates and viscous rheology at low shear rates for stationary applied fields. These results are interpreted in terms of surface adhesion of chain segments in contact with the substrate surface, which substantially reduces reptative molecular motion of nearly all chains within the film.
Databáze: OpenAIRE
Popis
Abstrakt:The rheology of 44-75-nm-thick polystyrene films were probed by destabilization in an electric field. The non-cross-linked films showed the hallmark of viscoelasiticy; they exhibited elastic behavior at high shear rates and viscous rheology at low shear rates for stationary applied fields. These results are interpreted in terms of surface adhesion of chain segments in contact with the substrate surface, which substantially reduces reptative molecular motion of nearly all chains within the film.
ISSN:15502376
15393755
DOI:10.1103/physreve.89.062604