Mid-Infrared Spectroscopic Investigation of the Perfect Vitrification of Poly(ethylene glycol) Aqueous Solutions

Makoto Gemmei-Ide; Takashi Miyashita; Shigehiro Kagaya; Hiromi Kitano

doi:10.1021/acs.langmuir.5b02829

Mid-Infrared Spectroscopic Investigation of the Perfect Vitrification of Poly(ethylene glycol) Aqueous Solutions

Makoto Gemmei-Ide^*, Takashi Miyashita, Shigehiro Kagaya, Hiromi Kitano

^*Corresponding author for this work

Applied Chemistry

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

12 Scopus citations

Abstract

Crystallization/recrystallization behaviors of poly(ethylene glycol) (PEG) aqueous solutions with water contents (W_C's) of ∼36-51 wt % were investigated by temperature-variable mid-infrared spectroscopy. At a W_C of 43.2 wt %, crystallization and recrystallization of water and PEG were not observed. At this specific W_C value (W_CPV), perfect vitrification occurred. Below and above the W_CPV value, crystallization/recrystallization behaviors changed drastically. The crystallization temperature below W_CPV (237 K) was ∼10 K greater than that above W_CPV (226 K). Recrystallization above and below W_CPV occurred in one (213 K) and two (198 and 210 K) steps, respectively. These findings resulted from the difference in the (re)crystallization behaviors of water molecules associated with PEG chains with helical and random-coil conformations. These two types of water molecules might have limiting concentrations for their (re)crystallization, indicating that perfect vitrification might have occurred when the concentrations of the two types of water molecules were less than the limiting concentrations of their (re)crystallization.

Original language	English
Pages (from-to)	10881-10887
Number of pages	7
Journal	Langmuir
Volume	31
Issue number	39
DOIs	https://doi.org/10.1021/acs.langmuir.5b02829
State	Published - 2015/09/12

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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title = "Mid-Infrared Spectroscopic Investigation of the Perfect Vitrification of Poly(ethylene glycol) Aqueous Solutions",

abstract = "Crystallization/recrystallization behaviors of poly(ethylene glycol) (PEG) aqueous solutions with water contents (WC's) of ∼36-51 wt % were investigated by temperature-variable mid-infrared spectroscopy. At a WC of 43.2 wt %, crystallization and recrystallization of water and PEG were not observed. At this specific WC value (WCPV), perfect vitrification occurred. Below and above the WCPV value, crystallization/recrystallization behaviors changed drastically. The crystallization temperature below WCPV (237 K) was ∼10 K greater than that above WCPV (226 K). Recrystallization above and below WCPV occurred in one (213 K) and two (198 and 210 K) steps, respectively. These findings resulted from the difference in the (re)crystallization behaviors of water molecules associated with PEG chains with helical and random-coil conformations. These two types of water molecules might have limiting concentrations for their (re)crystallization, indicating that perfect vitrification might have occurred when the concentrations of the two types of water molecules were less than the limiting concentrations of their (re)crystallization.",

author = "Makoto Gemmei-Ide and Takashi Miyashita and Shigehiro Kagaya and Hiromi Kitano",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = sep,

day = "12",

doi = "10.1021/acs.langmuir.5b02829",

language = "英語",

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T1 - Mid-Infrared Spectroscopic Investigation of the Perfect Vitrification of Poly(ethylene glycol) Aqueous Solutions

AU - Gemmei-Ide, Makoto

AU - Miyashita, Takashi

AU - Kagaya, Shigehiro

AU - Kitano, Hiromi

PY - 2015/9/12

Y1 - 2015/9/12

N2 - Crystallization/recrystallization behaviors of poly(ethylene glycol) (PEG) aqueous solutions with water contents (WC's) of ∼36-51 wt % were investigated by temperature-variable mid-infrared spectroscopy. At a WC of 43.2 wt %, crystallization and recrystallization of water and PEG were not observed. At this specific WC value (WCPV), perfect vitrification occurred. Below and above the WCPV value, crystallization/recrystallization behaviors changed drastically. The crystallization temperature below WCPV (237 K) was ∼10 K greater than that above WCPV (226 K). Recrystallization above and below WCPV occurred in one (213 K) and two (198 and 210 K) steps, respectively. These findings resulted from the difference in the (re)crystallization behaviors of water molecules associated with PEG chains with helical and random-coil conformations. These two types of water molecules might have limiting concentrations for their (re)crystallization, indicating that perfect vitrification might have occurred when the concentrations of the two types of water molecules were less than the limiting concentrations of their (re)crystallization.

AB - Crystallization/recrystallization behaviors of poly(ethylene glycol) (PEG) aqueous solutions with water contents (WC's) of ∼36-51 wt % were investigated by temperature-variable mid-infrared spectroscopy. At a WC of 43.2 wt %, crystallization and recrystallization of water and PEG were not observed. At this specific WC value (WCPV), perfect vitrification occurred. Below and above the WCPV value, crystallization/recrystallization behaviors changed drastically. The crystallization temperature below WCPV (237 K) was ∼10 K greater than that above WCPV (226 K). Recrystallization above and below WCPV occurred in one (213 K) and two (198 and 210 K) steps, respectively. These findings resulted from the difference in the (re)crystallization behaviors of water molecules associated with PEG chains with helical and random-coil conformations. These two types of water molecules might have limiting concentrations for their (re)crystallization, indicating that perfect vitrification might have occurred when the concentrations of the two types of water molecules were less than the limiting concentrations of their (re)crystallization.

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U2 - 10.1021/acs.langmuir.5b02829

DO - 10.1021/acs.langmuir.5b02829

M3 - 学術論文

C2 - 26365423

AN - SCOPUS:84942942110

SN - 0743-7463

VL - 31

SP - 10881

EP - 10887

JO - Langmuir

JF - Langmuir

IS - 39

ER -

Mid-Infrared Spectroscopic Investigation of the Perfect Vitrification of Poly(ethylene glycol) Aqueous Solutions

Abstract

ASJC Scopus subject areas

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