Glass transition behavior of PS films on grafted PS substrates

Hoyeon Lee; Hyungju Ahn; Sudhakar Naidu; Baek Seok Seong; Du Yeol Ryu; David M. Trombly; Venkat Ganesan

doi:10.1021/ma101743u

Glass transition behavior of PS films on grafted PS substrates

Hoyeon Lee, Hyungju Ahn, Sudhakar Naidu, Baek Seok Seong, Du Yeol Ryu, David M. Trombly, Venkat Ganesan

Department of Chemical and Biomolecular Engineering

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

36 Citations (Scopus)

Abstract

We present experimental results for the glass transition behavior of polystyrene (PS) films on grafted PS layers of the same chemical identity as a function of film thickness. Our results suggest that the T_g of PS films on brush substrates decreases with decreasing film thickness. The thickness dependence of T_g was observed to be more pronounced for the films on the shorter brushes with the high grafting density. We propose a qualitative rationalization of the observations by invoking both interfacial energy considerations as well as by adapting the percolation model for the glass transition of polymer films.

Original language	English
Pages (from-to)	9892-9898
Number of pages	7
Journal	Macromolecules
Volume	43
Issue number	23
DOIs	https://doi.org/10.1021/ma101743u
Publication status	Published - 2010 Dec 14

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma101743u

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abstract = "We present experimental results for the glass transition behavior of polystyrene (PS) films on grafted PS layers of the same chemical identity as a function of film thickness. Our results suggest that the Tg of PS films on brush substrates decreases with decreasing film thickness. The thickness dependence of Tg was observed to be more pronounced for the films on the shorter brushes with the high grafting density. We propose a qualitative rationalization of the observations by invoking both interfacial energy considerations as well as by adapting the percolation model for the glass transition of polymer films.",

author = "Hoyeon Lee and Hyungju Ahn and Sudhakar Naidu and Seong, {Baek Seok} and Ryu, {Du Yeol} and Trombly, {David M.} and Venkat Ganesan",

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AU - Lee, Hoyeon

AU - Ahn, Hyungju

AU - Naidu, Sudhakar

AU - Seong, Baek Seok

AU - Ryu, Du Yeol

AU - Trombly, David M.

AU - Ganesan, Venkat

PY - 2010/12/14

Y1 - 2010/12/14

N2 - We present experimental results for the glass transition behavior of polystyrene (PS) films on grafted PS layers of the same chemical identity as a function of film thickness. Our results suggest that the Tg of PS films on brush substrates decreases with decreasing film thickness. The thickness dependence of Tg was observed to be more pronounced for the films on the shorter brushes with the high grafting density. We propose a qualitative rationalization of the observations by invoking both interfacial energy considerations as well as by adapting the percolation model for the glass transition of polymer films.

AB - We present experimental results for the glass transition behavior of polystyrene (PS) films on grafted PS layers of the same chemical identity as a function of film thickness. Our results suggest that the Tg of PS films on brush substrates decreases with decreasing film thickness. The thickness dependence of Tg was observed to be more pronounced for the films on the shorter brushes with the high grafting density. We propose a qualitative rationalization of the observations by invoking both interfacial energy considerations as well as by adapting the percolation model for the glass transition of polymer films.

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JO - Macromolecules

JF - Macromolecules

IS - 23

ER -

Glass transition behavior of PS films on grafted PS substrates

Abstract

All Science Journal Classification (ASJC) codes

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