Confinement Effect on the Effective Viscosity of Plasticized Polymer Films

F. Chen; D. Peng; Y. Ogata; K. Tanaka; Z. Yang; Y. Fujii; N. L. Yamada; C. H. Lam; O. K.C. Tsui

doi:10.1021/acs.macromol.5b01780

Confinement Effect on the Effective Viscosity of Plasticized Polymer Films

F. Chen, D. Peng, Y. Ogata, K. Tanaka, Z. Yang, Y. Fujii, N. L. Yamada, C. H. Lam, O. K.C. Tsui

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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, M_w, from 13.7 to 2100 kg/mol was investigated. Our result shows that for the thin films with M_w < ∼100 kg/mol the addition of DOP causes the effective viscosity to decrease by a factor of ∼4, independent of M_w. But for the higher M_w films, the effective viscosity of the DOP added films creeps toward that of the neat films with increasing M_w. A model assuming the effective viscosity to be dominated by enhanced surface mobility for the lower M_w films but surface-promoted interfacial slippage for the higher M_w films is able to account for the experimental observations.

Original language	English
Pages (from-to)	7719-7726
Number of pages	8
Journal	Macromolecules
Volume	48
Issue number	20
DOIs	https://doi.org/10.1021/acs.macromol.5b01780
Publication status	Published - Oct 27 2015

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acs.macromol.5b01780

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title = "Confinement Effect on the Effective Viscosity of Plasticized Polymer Films",

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.",

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T1 - Confinement Effect on the Effective Viscosity of Plasticized Polymer Films

AU - Chen, F.

AU - Peng, D.

AU - Ogata, Y.

AU - Tanaka, K.

AU - Yang, Z.

AU - Fujii, Y.

AU - Yamada, N. L.

AU - Lam, C. H.

AU - Tsui, O. K.C.

PY - 2015/10/27

Y1 - 2015/10/27

N2 - 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.

AB - 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.

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JF - Macromolecules

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ER -

Confinement Effect on the Effective Viscosity of Plasticized Polymer Films

Abstract

All Science Journal Classification (ASJC) codes

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