Dynamics of water-induced surface reorganization in poly(methyl methacrylate) films

Ayanobu Horinouchi; Hironori Atarashi; Yoshihisa Fujii; Keiji Tanaka

doi:10.1021/ma3002559

Dynamics of water-induced surface reorganization in poly(methyl methacrylate) films

Ayanobu Horinouchi, Hironori Atarashi, Yoshihisa Fujii, Keiji Tanaka

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

69 Citations (Scopus)

Abstract

At the outermost surface, aggregation states of polymers generally tend to alter to their most stable ones in response to their surrounding environment. We here apply a time-resolved contact angle measurement to study the rate of the surface reorganization of poly(methyl methacrylate) (PMMA) in water. By doing these measurements at various temperatures, it is possible to determine the apparent activation energy of the surface dynamics based on the relation of the surface relaxation time and temperature. Also, the sum-frequency generation spectroscopy revealed that the surface reorganization involves the conformational changes in the main chain part as well as the side chains. Hence, the dynamics observed here may reflect the segmental motion at the outermost region of the PMMA film, in which water plays as a plasticizer.

Original language	English
Pages (from-to)	4638-4642
Number of pages	5
Journal	Macromolecules
Volume	45
Issue number	11
DOIs	https://doi.org/10.1021/ma3002559
Publication status	Published - Jun 12 2012
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma3002559

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AU - Horinouchi, Ayanobu

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N2 - At the outermost surface, aggregation states of polymers generally tend to alter to their most stable ones in response to their surrounding environment. We here apply a time-resolved contact angle measurement to study the rate of the surface reorganization of poly(methyl methacrylate) (PMMA) in water. By doing these measurements at various temperatures, it is possible to determine the apparent activation energy of the surface dynamics based on the relation of the surface relaxation time and temperature. Also, the sum-frequency generation spectroscopy revealed that the surface reorganization involves the conformational changes in the main chain part as well as the side chains. Hence, the dynamics observed here may reflect the segmental motion at the outermost region of the PMMA film, in which water plays as a plasticizer.

AB - At the outermost surface, aggregation states of polymers generally tend to alter to their most stable ones in response to their surrounding environment. We here apply a time-resolved contact angle measurement to study the rate of the surface reorganization of poly(methyl methacrylate) (PMMA) in water. By doing these measurements at various temperatures, it is possible to determine the apparent activation energy of the surface dynamics based on the relation of the surface relaxation time and temperature. Also, the sum-frequency generation spectroscopy revealed that the surface reorganization involves the conformational changes in the main chain part as well as the side chains. Hence, the dynamics observed here may reflect the segmental motion at the outermost region of the PMMA film, in which water plays as a plasticizer.

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Dynamics of water-induced surface reorganization in poly(methyl methacrylate) films

Abstract

ASJC Scopus subject areas

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