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http://hdl.handle.net/10397/96218
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: | 27-Oct-2015 | Source: | Macromolecules, 27 Oct. 2015, v. 48, no. 20, p. 7719-7726 | 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. | Publisher: | American Chemical Society | Journal: | Macromolecules | ISSN: | 0024-9297 | EISSN: | 1520-5835 | DOI: | 10.1021/acs.macromol.5b01780 | Rights: | © 2015 American Chemical Society This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.5b01780. |
Appears in Collections: | Journal/Magazine Article |
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Confinement_Effect_Effective.pdf | Pre-Published version | 1.47 MB | Adobe PDF | View/Open |
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