TY - JOUR
T1 - SANS study on rapid shrinking of comb-type poly(N-isopropylacrylamide) gels
AU - Annaka, M.
AU - Sugiyama, M.
AU - Matsuura, T.
AU - Hino, M.
AU - Fukunaga, T.
AU - Hara, Y.
AU - Okano, T.
N1 - Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2004/7/15
Y1 - 2004/7/15
N2 - The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.
AB - The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.
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U2 - 10.1016/j.physb.2004.03.241
DO - 10.1016/j.physb.2004.03.241
M3 - Article
AN - SCOPUS:20844438721
VL - 350
SP - e935-e937
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-3 SUPPL. 1
ER -