Transition features in the dehydration of polymer gels

Kazuhiro Hara, Masaaki Sugiyama, Atsushi Nakamura, Nobuyasu Hiramatsu

Research output: Contribution to journalArticle

Abstract

The property changes of some wet gels (the heat-treated egg white gel and poly-acrylamide gel) during the dehydration process, and those of the dehydrated gels during the temperature increasing process has been investigated with several methods. In the dehydration process, anomalies in the evolution of weight, volume, elasticity and Raman scattering spectrum were observed when the free water in the gel has been almost dissipated. This feature indicated the occurrence of a kind of transition analogous to the glass transition. The dehydrated gels looked like plastics and showed anomalies in elastic and thermal properties around 60 °C with increasing temperature. Though these behaviors resembled those in the glass transition of non-crystalline polymers, we have also observed some differences between the dehydrated gels and usual polymer glasses from the observation of the temperature dependence of the low frequency Raman scattering spectrum (∼ 300 cm-1).

Original languageEnglish
JournalJournal of the Korean Physical Society
Volume35
Issue numberSUPPL. 5
Publication statusPublished - Dec 1 1999

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dehydration
gels
polymers
glass
elastic properties
scattering
Raman spectra
anomalies
eggs
plastics
thermodynamic properties
occurrences
low frequencies
heat
temperature dependence
temperature
water

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hara, K., Sugiyama, M., Nakamura, A., & Hiramatsu, N. (1999). Transition features in the dehydration of polymer gels. Journal of the Korean Physical Society, 35(SUPPL. 5).

Transition features in the dehydration of polymer gels. / Hara, Kazuhiro; Sugiyama, Masaaki; Nakamura, Atsushi; Hiramatsu, Nobuyasu.

In: Journal of the Korean Physical Society, Vol. 35, No. SUPPL. 5, 01.12.1999.

Research output: Contribution to journalArticle

Hara, K, Sugiyama, M, Nakamura, A & Hiramatsu, N 1999, 'Transition features in the dehydration of polymer gels', Journal of the Korean Physical Society, vol. 35, no. SUPPL. 5.
Hara K, Sugiyama M, Nakamura A, Hiramatsu N. Transition features in the dehydration of polymer gels. Journal of the Korean Physical Society. 1999 Dec 1;35(SUPPL. 5).
Hara, Kazuhiro ; Sugiyama, Masaaki ; Nakamura, Atsushi ; Hiramatsu, Nobuyasu. / Transition features in the dehydration of polymer gels. In: Journal of the Korean Physical Society. 1999 ; Vol. 35, No. SUPPL. 5.
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