CAN POSITRON-ANNIHILATION LIFETIME SPECTROSCOPY MEASURE THE FREE-VOLUME HOLE SIZE DISTRIBUTION IN AMORPHOUS POLYMERS

被引：54
|
作者：
YU, Z [1 ]
MCGERVEY, JD [1 ]
JAMIESON, AM [1 ]
SIMHA, R [1 ]
机构：
[1] CASE WESTERN RESERVE UNIV,DEPT MACROMOLEC SCI,CLEVELAND,OH 44106
来源：
MACROMOLECULES | 1995年 / 28卷 / 18期
关键词：
D O I：
10.1021/ma00122a038
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We discuss the theoretical basis for relating the mean ortho-positronium (o-Ps) lifetime to free-volume hole sizes using a finite spherical potential well model. The status of the localized o-Ps atom in amorphous polymers is evaluated by calculation of the o-Ps barrier transmission probability. The results indicate that the relative probability for an o-Ps atom to remain in a particular hole during its entire lifetime is on the order of 10(-2). We conclude that there is no justification for a one-to-one correlation of o-Ps lifetime components with specific hole sizes.
引用
收藏
页码：6268 / 6272
页数：5
相关论文
共 50 条
  • [21] Free-volume characterization of nanostructurized substances by positron annihilation lifetime spectroscopy
    Shpotyuk, O.
    Ingram, A.
    Shpotyuk, Ya.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2018, 416 : 102 - 109
  • [22] SHAPES OF THE FREE VOLUME HOLES IN AMORPHOUS POLYMERS AS ESTIMATED BY POSITRON ANNIHILATION LIFETIME SPECTROSCOPY
    Consolati, G.
    Quasso, F.
    ACTA PHYSICA POLONICA B, 2020, 51 (01): : 201 - 206
  • [23] Positron lifetime studies of free volume hole size distribution in amorphous and in semi-crystalline polymers
    Dlubek, G
    Clarke, AP
    Fretwell, HM
    Dugdale, SB
    Alam, MA
    JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, 1996, 211 (01): : 69 - 76
  • [24] FREE-VOLUME HOLE DISTRIBUTIONS OF POLYMERS VIA THE POSITRON LIFETIME TECHNIQUE
    ABDELHADY, EE
    ELSAYED, AMA
    POLYMER DEGRADATION AND STABILITY, 1995, 47 (03) : 369 - 373
  • [25] Free-volume hole properties of gas-exposed polycarbonate studied by positron annihilation lifetime spectroscopy
    Hong, X
    Jean, YC
    Yang, HJ
    Jordan, SS
    Koros, WJ
    MACROMOLECULES, 1996, 29 (24) : 7859 - 7864
  • [26] FREE-VOLUME AND PORE-SIZE DISTRIBUTIONS DETERMINED BY NUMERICAL LAPLACE INVERSION OF POSITRON-ANNIHILATION LIFETIME DATA
    GREGORY, RB
    JOURNAL OF APPLIED PHYSICS, 1991, 70 (09) : 4665 - 4670
  • [27] PHYSICAL-PROPERTIES OF EPOXY AND FREE-VOLUME EVALUATED BY POSITRON-ANNIHILATION SPECTROSCOPY
    OKADA, T
    NISHIJIMA, S
    HONDA, Y
    KOBAYASHI, Y
    JOURNAL DE PHYSIQUE IV, 1993, 3 (C4): : 291 - 294
  • [28] Positron annihilation lifetime spectroscopy to probe free-volume effects in high-temperature polymers and composites
    Hill, AJ
    HIGH-TEMPERATURE PROPERTIES AND APPLICATIONS OF POLYMERIC MATERIALS, 1995, 603 : 63 - 80
  • [29] FREE-VOLUME DISTRIBUTIONS OF POLYSTYRENE PROBED BY POSITRON-ANNIHILATION - COMPARISON WITH FREE-VOLUME THEORIES
    LIU, J
    DENG, Q
    JEAN, YC
    MACROMOLECULES, 1993, 26 (26) : 7149 - 7155
  • [30] Free-volume hole properties near the surface of polymers obtained from slow positron annihilation spectroscopy
    Jean, YC
    Cao, H
    Dai, GH
    Suzuki, R
    Ohdaira, T
    Kobayashi, Y
    Hirata, K
    APPLIED SURFACE SCIENCE, 1997, 116 : 251 - 255
12345