Direct Observation of Conformational Relaxation of Polymer Chains at Surfaces

Hung K. Nguyen; Manabu Inutsuka; Daisuke Kawaguchi; Keiji Tanaka

doi:10.1021/acsmacrolett.8b00411

Direct Observation of Conformational Relaxation of Polymer Chains at Surfaces

Hung K. Nguyen, Manabu Inutsuka, Daisuke Kawaguchi, Keiji Tanaka

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

20 Citations (Scopus)

Abstract

Sum-frequency generation spectroscopy was employed to follow the conformation evolution of polystyrene chains at the surface of a spin-coated film in a temperature-ramping mode as well as under isothermal annealing. The conformation of surface chains in an as-cast film was observed to be in a nonequilibrium state, in accordance with reported results for polymer chains in thin spin-coated films. While the relaxation of surface nonequilibrium chains was induced by the enhanced surface mobility, the whole chain motion such as reptation might be a key factor in determining the time scale for equilibrating the surface chain conformation.

Original language	English
Pages (from-to)	1198-1202
Number of pages	5
Journal	ACS Macro Letters
Volume	7
Issue number	10
DOIs	https://doi.org/10.1021/acsmacrolett.8b00411
Publication status	Published - Oct 16 2018

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acsmacrolett.8b00411

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title = "Direct Observation of Conformational Relaxation of Polymer Chains at Surfaces",

abstract = "Sum-frequency generation spectroscopy was employed to follow the conformation evolution of polystyrene chains at the surface of a spin-coated film in a temperature-ramping mode as well as under isothermal annealing. The conformation of surface chains in an as-cast film was observed to be in a nonequilibrium state, in accordance with reported results for polymer chains in thin spin-coated films. While the relaxation of surface nonequilibrium chains was induced by the enhanced surface mobility, the whole chain motion such as reptation might be a key factor in determining the time scale for equilibrating the surface chain conformation.",

author = "Nguyen, {Hung K.} and Manabu Inutsuka and Daisuke Kawaguchi and Keiji Tanaka",

note = "Funding Information: This research was partially supported by the JSPS KAKENHI Grant-in-Aid for Scientific Research (A) (No. JP15H02183). We also appreciate the support from the ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). Publisher Copyright: Copyright {\textcopyright} 2018 American Chemical Society.",

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doi = "10.1021/acsmacrolett.8b00411",

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AU - Nguyen, Hung K.

AU - Inutsuka, Manabu

AU - Kawaguchi, Daisuke

AU - Tanaka, Keiji

N1 - Funding Information: This research was partially supported by the JSPS KAKENHI Grant-in-Aid for Scientific Research (A) (No. JP15H02183). We also appreciate the support from the ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). Publisher Copyright: Copyright © 2018 American Chemical Society.

PY - 2018/10/16

Y1 - 2018/10/16

N2 - Sum-frequency generation spectroscopy was employed to follow the conformation evolution of polystyrene chains at the surface of a spin-coated film in a temperature-ramping mode as well as under isothermal annealing. The conformation of surface chains in an as-cast film was observed to be in a nonequilibrium state, in accordance with reported results for polymer chains in thin spin-coated films. While the relaxation of surface nonequilibrium chains was induced by the enhanced surface mobility, the whole chain motion such as reptation might be a key factor in determining the time scale for equilibrating the surface chain conformation.

AB - Sum-frequency generation spectroscopy was employed to follow the conformation evolution of polystyrene chains at the surface of a spin-coated film in a temperature-ramping mode as well as under isothermal annealing. The conformation of surface chains in an as-cast film was observed to be in a nonequilibrium state, in accordance with reported results for polymer chains in thin spin-coated films. While the relaxation of surface nonequilibrium chains was induced by the enhanced surface mobility, the whole chain motion such as reptation might be a key factor in determining the time scale for equilibrating the surface chain conformation.

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Direct Observation of Conformational Relaxation of Polymer Chains at Surfaces

Abstract

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