Heat-Induced Evolution of the Mesoscopic Structure of Dehydrated Poly(vinyl alcohol) Gel

Masaaki Sugiyama, Annaka Masahiko, Kazuhiro Hara

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Time-resolved small-angle X-ray scattering (SAXS) investigations were carried out in order to clarify the heat treatment effects on the structure of a dehydrated substance made from a crystalline-polymer (poly(vinyl alcohol)) hydrogel. The heat-treatments performed in the present study consisted of two procedures: an initial temperature increase to a target temperature (T t) and a successive thermoregulation to maintain Tt. The evolution of the SAXS profile in the first procedure indicated that a mesoscopic structure, which probably originated from an inhomogeneity between crystalline and amorphous ingredients, began to develop around the glass transition temperature and became more distinct and large with increasing temperature. However, the SAXS profile showed almost no change for a long time during the second procedure. The latter feature was quite different from the crystallization processes of polymers without cross-linkage, which demonstrates how the cross-linkage hinders the thermal motion of the network polymers in the dehydrated gel.

元の言語英語
ページ(範囲)1035-1038
ページ数4
ジャーナルJournal of the Physical Society of Japan
71
発行部数4
DOI
出版物ステータス出版済み - 4 2002

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alcohols
gels
linkages
heat
polymers
heat treatment
thermoregulation
scattering
x rays
profiles
ingredients
glass transition temperature
temperature
inhomogeneity
crystallization

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Heat-Induced Evolution of the Mesoscopic Structure of Dehydrated Poly(vinyl alcohol) Gel. / Sugiyama, Masaaki; Masahiko, Annaka; Hara, Kazuhiro.

:: Journal of the Physical Society of Japan, 巻 71, 番号 4, 04.2002, p. 1035-1038.

研究成果: ジャーナルへの寄稿記事

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