2003年7月
Microscopic implication of rapid shrinking of comb-type grafted poly (N-isopropylacrylamide) hydrogels
POLYMER
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- ,
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- 巻
- 44
- 号
- 16
- 開始ページ
- 4405
- 終了ページ
- 4409
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0032-3861(03)00467-1
- 出版者・発行元
- ELSEVIER SCI LTD
The shrinking mechanism of comb-type grafted poly(N-isopropylacrylamide) gel was investigated by small-angle X-ray scattering (SAXS). The SAXS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type grafted poly(N-isopropylacrylamide) gel during the shrinking process. These observations suggest that the freely mobile characteristics of the grafted chains are expected to show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. The dehydrated grafted chains created the hydrophobic cores, which enhance the hydrophobic aggregation of the networks. These aggregations of the NIPA chains contribute to an increase in void volume, which allow the gel having a pathway of water molecules by the phase separation. (C) 2003 Elsevier Science Ltd. All fights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0032-3861(03)00467-1
- ISSN : 0032-3861
- Web of Science ID : WOS:000184168800002