Temperature dependence of free volume of polyacrylamide gels studied by positron lifetime measurements

被引：3
|
作者：
Ito, K [1 ]
Ujihira, Y [1 ]
Yamashita, T [1 ]
Horie, K [1 ]
机构：
[1] Univ Tokyo, Grad Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2000年 / 58卷 / 5-6期
关键词：
D O I：
10.1016/S0969-806X(00)00210-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Changes of positronium (Ps) cavity radii in polyacrylamide and poly(N-isopropylacrylamide) gels were studied from 120 to 300 K by positron lifetime technique and it has been shown that the Ps cavity radius in the hydrogels changes by three or four stages. Temperature dependence of the Ps cavity radius exhibits variations similar to common polymers around the glass transition temperature. Hydrophilicity of the polymer chains significantly affects the Ps cavity radius just below 273 K. These results suggest an important role of free volume on the state of water in hydrogels. (C) 2000 Published by Elsevier Science Ltd.
引用
收藏
页码：521 / 524
页数：4
相关论文
共 50 条
  • [1] Change in free volume parameters of polyacrylamide gels studied by positron annihilation lifetime measurement
    Ito, K
    Ujihira, Y
    Yamashita, T
    Horie, K
    POSITRON ANNIHILATION: ICPA-11 - PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION, KANSAS CITY, MISSOURI, USA, MAY 1997, 1997, 255-2 : 375 - 377
  • [2] TEMPERATURE-DEPENDENCE OF FREE-VOLUME DISTRIBUTIONS IN POLYMERS STUDIED BY POSITRON LIFETIME SPECTROSCOPY
    KRISTIAK, J
    KRISTIAKOVA, K
    SAUSA, O
    BANDZUCH, P
    BARTOS, J
    JOURNAL DE PHYSIQUE IV, 1993, 3 (C4): : 265 - 270
  • [3] Compositional and temperature dependence of free volume in segmented copolymer PET/PEO studied by positron annihilation lifetime measurement
    Wang, B
    Zhang, M
    Zhang, JM
    He, CQ
    Dai, YQ
    Wang, SJ
    Ma, DZ
    PHYSICS LETTERS A, 1999, 262 (2-3) : 195 - 205
  • [4] Temperature dependence of the free volume in polytetrafluoroethylene studied by positron annihilation spectroscopy
    Mohamed, Hamdy F. M.
    Abdel-Hady, E. E.
    Mohamed, Salwa S.
    RADIATION PHYSICS AND CHEMISTRY, 2007, 76 (02) : 160 - 164
  • [5] TEMPERATURE AND TIME-DEPENDENCE OF FREE-VOLUME IN BISPHENOL-A POLYCARBONATE STUDIED BY POSITRON LIFETIME SPECTROSCOPY
    KLUIN, JE
    YU, Z
    VLEESHOUWERS, S
    MCGERVEY, JD
    JAMIESON, AM
    SIMHA, R
    MACROMOLECULES, 1992, 25 (19) : 5089 - 5093
  • [6] Change in free volume parameters of poly(vinylalcohol) gels studied by positron annihilation lifetime measurement
    Ito, K
    Ujihira, Y
    Higa, M
    POSITRON ANNIHILATION: ICPA-11 - PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION, KANSAS CITY, MISSOURI, USA, MAY 1997, 1997, 255-2 : 305 - 307
  • [7] Free-volume change in volume phase transition of polyacrylamide gel as studied by positron annihilation: Salt dependence
    Ito, K
    Ujihira, Y
    Yamashita, T
    Horie, K
    JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1999, 37 (18) : 2634 - 2641
  • [8] Temperature dependence of the free volume holes in polyhydroxybutyrate biopolymer: A positron lifetime study
    Abdel-Hady, E. E.
    Mohamed, Hamdy F. M.
    Fareed, Somia S.
    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 10, 2007, 4 (10): : 3907 - +
  • [9] Temperature dependence of the free volume in fluoroelastomers from positron lifetime and PVT experiments
    Dlubek, G
    Sen Gupta, A
    Pionteck, J
    Krause-Rehberg, R
    Kaspar, H
    Lochhaas, KH
    MACROMOLECULES, 2004, 37 (17) : 6606 - 6618
  • [10] The temperature dependence of the local free volume in polyethylene and polytetrafluoroethylene: A positron lifetime study
    Dlubek, G
    Saarinen, K
    Fretwell, HM
    JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1998, 36 (09) : 1513 - 1528
12345