Molecular weight dependence of surface dynamic viscoelastic properties for the monodisperse polystyrene film

Keiji Tanaka; Aki Taura; Shou Ren Ge; Atsushi Takahara; Tisato Kajiyama

doi:10.1021/ma951378y

Molecular weight dependence of surface dynamic viscoelastic properties for the monodisperse polystyrene film

Keiji Tanaka, Aki Taura, Shou Ren Ge, Atsushi Takahara, Tisato Kajiyama

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190 Citations (Scopus)

Abstract

The molecullar weight dependence of the surface viscoelasticity function for the monodisperse PS (polystyrene) films has been investigated on the basis of SVM (scanning viscoelasticity microscope) measurement. In the case of M_n < 26.6K, the film surface is found to be in a glass-rubber transition state or a rubbery state, even at 293K. A depression of the surface T_g compared with that of bulk samples is explained in the basis of the surface localization of chain end groups. SIMS measurements revealed that chain end groups are enriched in the depth range from the outermost surface to R_g.

Original language	English
Pages (from-to)	3040-3042
Number of pages	3
Journal	Macromolecules
Volume	29
Issue number	8
DOIs	https://doi.org/10.1021/ma951378y
Publication status	Published - Apr 8 1996

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma951378y

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abstract = "The molecullar weight dependence of the surface viscoelasticity function for the monodisperse PS (polystyrene) films has been investigated on the basis of SVM (scanning viscoelasticity microscope) measurement. In the case of Mn < 26.6K, the film surface is found to be in a glass-rubber transition state or a rubbery state, even at 293K. A depression of the surface Tg compared with that of bulk samples is explained in the basis of the surface localization of chain end groups. SIMS measurements revealed that chain end groups are enriched in the depth range from the outermost surface to Rg.",

author = "Keiji Tanaka and Aki Taura and Ge, {Shou Ren} and Atsushi Takahara and Tisato Kajiyama",

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AU - Tanaka, Keiji

AU - Taura, Aki

AU - Ge, Shou Ren

AU - Takahara, Atsushi

AU - Kajiyama, Tisato

PY - 1996/4/8

Y1 - 1996/4/8

N2 - The molecullar weight dependence of the surface viscoelasticity function for the monodisperse PS (polystyrene) films has been investigated on the basis of SVM (scanning viscoelasticity microscope) measurement. In the case of Mn < 26.6K, the film surface is found to be in a glass-rubber transition state or a rubbery state, even at 293K. A depression of the surface Tg compared with that of bulk samples is explained in the basis of the surface localization of chain end groups. SIMS measurements revealed that chain end groups are enriched in the depth range from the outermost surface to Rg.

AB - The molecullar weight dependence of the surface viscoelasticity function for the monodisperse PS (polystyrene) films has been investigated on the basis of SVM (scanning viscoelasticity microscope) measurement. In the case of Mn < 26.6K, the film surface is found to be in a glass-rubber transition state or a rubbery state, even at 293K. A depression of the surface Tg compared with that of bulk samples is explained in the basis of the surface localization of chain end groups. SIMS measurements revealed that chain end groups are enriched in the depth range from the outermost surface to Rg.

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Molecular weight dependence of surface dynamic viscoelastic properties for the monodisperse polystyrene film

Abstract

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