Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43868
Title: Confinement effect on the effective viscosity of plasticized polymer films
Authors: Chen, F
Peng, D
Ogata, Y
Tanaka, K
Yang, Z
Fujii, Y
Yamada, NL
Lam, CH 
Tsui, OKC
Issue Date: 2015
Publisher: American Chemical Society
Source: Macromolecules, 2015, v. 48, no. 20, p. 7719-7726 How to cite?
Journal: Macromolecules 
Abstract: We have measured the effective viscosity of polystyrene films with a small (4 wt %) added amount of dioctyl phthalate (DOP) deposited on silica. A broad range of molecular weights, Mw, from 13.7 to 2100 kg/mol was investigated. Our result shows that for the thin films with Mw < ∼100 kg/mol the addition of DOP causes the effective viscosity to decrease by a factor of ∼4, independent of Mw. But for the higher Mw films, the effective viscosity of the DOP added films creeps toward that of the neat films with increasing Mw. A model assuming the effective viscosity to be dominated by enhanced surface mobility for the lower Mw films but surface-promoted interfacial slippage for the higher Mw films is able to account for the experimental observations.
URI: http://hdl.handle.net/10397/43868
ISSN: 0024-9297 (print)
1520-5835 (online)
DOI: 10.1021/acs.macromol.5b01780
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