Study of crystallization of the sorbed water into solid polymers

Tetsuya Motonaga; Makoto Gemmei-Ide; Hiromi Kitano

Study of crystallization of the sorbed water into solid polymers

Tetsuya Motonaga^*, Makoto Gemmei-Ide, Hiromi Kitano

^*Corresponding author for this work

Applied Chemistry

Research output: Contribution to conference › Paper › peer-review

Abstract

Changes of the state of sorbed water into various polymer films by cooling were investigated by FT-IR. In case of annealed PMMA, the sorbed water under 58 and 99% RH did not freeze even at 140 K. In case of non-annealed PMMA, the sorbed water under 100% RH freezed. During the growth of ice in the PMMA matrix, the absorption band assigned to non-freezable water also changed drastically. This result suggests that the non-freezable water is not universally non-freezable, and that a part (surface) of the ice interacts with the polymer chains. On the other hand, in case of PSt, the sorbed water under 58% RH showed a liquid-water-like spectrum below 250 K on cooling, and then, freezed at the so-called homogeneous nucleation temperature, T_H = 234 K, of water. This result suggests the very weak interaction between the PSt chain and ice.

Original language	English
Pages	4381-4382
Number of pages	2
State	Published - 2006
Event	55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan Duration: 2006/09/20 → 2006/09/22

Conference

Conference	55th Society of Polymer Science Japan Symposium on Macromolecules
Country/Territory	Japan
City	Toyama
Period	2006/09/20 → 2006/09/22

Keywords

Ice formation
Non-freezable water
Solid polymer

ASJC Scopus subject areas

General Engineering

Cite this

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title = "Study of crystallization of the sorbed water into solid polymers",

abstract = "Changes of the state of sorbed water into various polymer films by cooling were investigated by FT-IR. In case of annealed PMMA, the sorbed water under 58 and 99% RH did not freeze even at 140 K. In case of non-annealed PMMA, the sorbed water under 100% RH freezed. During the growth of ice in the PMMA matrix, the absorption band assigned to non-freezable water also changed drastically. This result suggests that the non-freezable water is not universally non-freezable, and that a part (surface) of the ice interacts with the polymer chains. On the other hand, in case of PSt, the sorbed water under 58% RH showed a liquid-water-like spectrum below 250 K on cooling, and then, freezed at the so-called homogeneous nucleation temperature, TH = 234 K, of water. This result suggests the very weak interaction between the PSt chain and ice.",

keywords = "Ice formation, Non-freezable water, Solid polymer",

author = "Tetsuya Motonaga and Makoto Gemmei-Ide and Hiromi Kitano",

year = "2006",

language = "英語",

pages = "4381--4382",

note = "55th Society of Polymer Science Japan Symposium on Macromolecules ; Conference date: 20-09-2006 Through 22-09-2006",

}

TY - CONF

T1 - Study of crystallization of the sorbed water into solid polymers

AU - Motonaga, Tetsuya

AU - Gemmei-Ide, Makoto

AU - Kitano, Hiromi

PY - 2006

Y1 - 2006

N2 - Changes of the state of sorbed water into various polymer films by cooling were investigated by FT-IR. In case of annealed PMMA, the sorbed water under 58 and 99% RH did not freeze even at 140 K. In case of non-annealed PMMA, the sorbed water under 100% RH freezed. During the growth of ice in the PMMA matrix, the absorption band assigned to non-freezable water also changed drastically. This result suggests that the non-freezable water is not universally non-freezable, and that a part (surface) of the ice interacts with the polymer chains. On the other hand, in case of PSt, the sorbed water under 58% RH showed a liquid-water-like spectrum below 250 K on cooling, and then, freezed at the so-called homogeneous nucleation temperature, TH = 234 K, of water. This result suggests the very weak interaction between the PSt chain and ice.

AB - Changes of the state of sorbed water into various polymer films by cooling were investigated by FT-IR. In case of annealed PMMA, the sorbed water under 58 and 99% RH did not freeze even at 140 K. In case of non-annealed PMMA, the sorbed water under 100% RH freezed. During the growth of ice in the PMMA matrix, the absorption band assigned to non-freezable water also changed drastically. This result suggests that the non-freezable water is not universally non-freezable, and that a part (surface) of the ice interacts with the polymer chains. On the other hand, in case of PSt, the sorbed water under 58% RH showed a liquid-water-like spectrum below 250 K on cooling, and then, freezed at the so-called homogeneous nucleation temperature, TH = 234 K, of water. This result suggests the very weak interaction between the PSt chain and ice.

KW - Ice formation

KW - Non-freezable water

KW - Solid polymer

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M3 - 学会論文

AN - SCOPUS:33846156535

SP - 4381

EP - 4382

T2 - 55th Society of Polymer Science Japan Symposium on Macromolecules

Y2 - 20 September 2006 through 22 September 2006

ER -

Study of crystallization of the sorbed water into solid polymers

Abstract

Conference

Keywords

ASJC Scopus subject areas

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