Chain behavior in model homogeneous ER fluids depending on temperature

Hirokazu Okamura, Kaori Suzuki, Takeshi Mori, Keiji Minagawa, Seizo Masuda, Masami Tanaka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Water-soluble urethane-modified polyethers were prepared by addition of poly(ethylene oxide) co-poly(propylene oxide) and aromatic isocyanate compounds. These polymers were found to dissolve in water at lower temperature and separate from solution upon heating. The temperature showing this unusual solubility change is called lower critical solution temperature (LCST). These chemical structures of thermo-responsive polymers were similar to those of urethanemodified ER active polymers containing poly(tetramethylene oxide) and aromatic urethane moiety. The thermo-responsive and ER polymers may have various intra- and intermolecular interactions through the urethane moiety. It is considered that both thermo-responsivility and ER effect are dependent on the conformational stability of the polymers under different conditions possibly related to these stimuli-responsivility through the molecular interactions. In order to clarify molecular motion of thermo-responsive polymers near the LCST, 1H-NMR spin-lattice relaxation time (T1) was measured in D2O. The result indicated that hydrophobic interaction of terminal urethane moiety would strongly affect the LCST behavior.

Original languageEnglish
Pages (from-to)2385-2391
Number of pages7
JournalInternational Journal of Modern Physics B
Volume16
Issue number17-18
Publication statusPublished - Jul 20 2002
Externally publishedYes

Fingerprint

electrorheological fluids
urethanes
polymers
temperature
propylene oxide
isocyanates
molecular interactions
ethylene oxide
polypropylene
spin-lattice relaxation
stimuli
water
solubility
relaxation time
interactions
nuclear magnetic resonance
heating
oxides

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Cite this

Okamura, H., Suzuki, K., Mori, T., Minagawa, K., Masuda, S., & Tanaka, M. (2002). Chain behavior in model homogeneous ER fluids depending on temperature. International Journal of Modern Physics B, 16(17-18), 2385-2391.

Chain behavior in model homogeneous ER fluids depending on temperature. / Okamura, Hirokazu; Suzuki, Kaori; Mori, Takeshi; Minagawa, Keiji; Masuda, Seizo; Tanaka, Masami.

In: International Journal of Modern Physics B, Vol. 16, No. 17-18, 20.07.2002, p. 2385-2391.

Research output: Contribution to journalArticle

Okamura, H, Suzuki, K, Mori, T, Minagawa, K, Masuda, S & Tanaka, M 2002, 'Chain behavior in model homogeneous ER fluids depending on temperature', International Journal of Modern Physics B, vol. 16, no. 17-18, pp. 2385-2391.
Okamura H, Suzuki K, Mori T, Minagawa K, Masuda S, Tanaka M. Chain behavior in model homogeneous ER fluids depending on temperature. International Journal of Modern Physics B. 2002 Jul 20;16(17-18):2385-2391.
Okamura, Hirokazu ; Suzuki, Kaori ; Mori, Takeshi ; Minagawa, Keiji ; Masuda, Seizo ; Tanaka, Masami. / Chain behavior in model homogeneous ER fluids depending on temperature. In: International Journal of Modern Physics B. 2002 ; Vol. 16, No. 17-18. pp. 2385-2391.
@article{97bd1ff710cf435b951bea8e2857fd7c,
title = "Chain behavior in model homogeneous ER fluids depending on temperature",
abstract = "Water-soluble urethane-modified polyethers were prepared by addition of poly(ethylene oxide) co-poly(propylene oxide) and aromatic isocyanate compounds. These polymers were found to dissolve in water at lower temperature and separate from solution upon heating. The temperature showing this unusual solubility change is called lower critical solution temperature (LCST). These chemical structures of thermo-responsive polymers were similar to those of urethanemodified ER active polymers containing poly(tetramethylene oxide) and aromatic urethane moiety. The thermo-responsive and ER polymers may have various intra- and intermolecular interactions through the urethane moiety. It is considered that both thermo-responsivility and ER effect are dependent on the conformational stability of the polymers under different conditions possibly related to these stimuli-responsivility through the molecular interactions. In order to clarify molecular motion of thermo-responsive polymers near the LCST, 1H-NMR spin-lattice relaxation time (T1) was measured in D2O. The result indicated that hydrophobic interaction of terminal urethane moiety would strongly affect the LCST behavior.",
author = "Hirokazu Okamura and Kaori Suzuki and Takeshi Mori and Keiji Minagawa and Seizo Masuda and Masami Tanaka",
year = "2002",
month = "7",
day = "20",
language = "English",
volume = "16",
pages = "2385--2391",
journal = "International Journal of Modern Physics B",
issn = "0217-9792",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "17-18",

}

TY - JOUR

T1 - Chain behavior in model homogeneous ER fluids depending on temperature

AU - Okamura, Hirokazu

AU - Suzuki, Kaori

AU - Mori, Takeshi

AU - Minagawa, Keiji

AU - Masuda, Seizo

AU - Tanaka, Masami

PY - 2002/7/20

Y1 - 2002/7/20

N2 - Water-soluble urethane-modified polyethers were prepared by addition of poly(ethylene oxide) co-poly(propylene oxide) and aromatic isocyanate compounds. These polymers were found to dissolve in water at lower temperature and separate from solution upon heating. The temperature showing this unusual solubility change is called lower critical solution temperature (LCST). These chemical structures of thermo-responsive polymers were similar to those of urethanemodified ER active polymers containing poly(tetramethylene oxide) and aromatic urethane moiety. The thermo-responsive and ER polymers may have various intra- and intermolecular interactions through the urethane moiety. It is considered that both thermo-responsivility and ER effect are dependent on the conformational stability of the polymers under different conditions possibly related to these stimuli-responsivility through the molecular interactions. In order to clarify molecular motion of thermo-responsive polymers near the LCST, 1H-NMR spin-lattice relaxation time (T1) was measured in D2O. The result indicated that hydrophobic interaction of terminal urethane moiety would strongly affect the LCST behavior.

AB - Water-soluble urethane-modified polyethers were prepared by addition of poly(ethylene oxide) co-poly(propylene oxide) and aromatic isocyanate compounds. These polymers were found to dissolve in water at lower temperature and separate from solution upon heating. The temperature showing this unusual solubility change is called lower critical solution temperature (LCST). These chemical structures of thermo-responsive polymers were similar to those of urethanemodified ER active polymers containing poly(tetramethylene oxide) and aromatic urethane moiety. The thermo-responsive and ER polymers may have various intra- and intermolecular interactions through the urethane moiety. It is considered that both thermo-responsivility and ER effect are dependent on the conformational stability of the polymers under different conditions possibly related to these stimuli-responsivility through the molecular interactions. In order to clarify molecular motion of thermo-responsive polymers near the LCST, 1H-NMR spin-lattice relaxation time (T1) was measured in D2O. The result indicated that hydrophobic interaction of terminal urethane moiety would strongly affect the LCST behavior.

UR - http://www.scopus.com/inward/record.url?scp=0037142844&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037142844&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0037142844

VL - 16

SP - 2385

EP - 2391

JO - International Journal of Modern Physics B

JF - International Journal of Modern Physics B

SN - 0217-9792

IS - 17-18

ER -