Positron annihilation and 129Xe NMR studies of free volume in polymers

被引：28
|
作者：
Nagasaka, B [1 ]
Eguchi, T
Nakayama, H
Nakamura, N
Ito, Y
机构：
[1] Osaka Univ, Grad Sch Sci, Dept Chem, Toyonaka, Osaka 5600043, Japan
[2] Teijin Ltd, Mat Anal Res Labs, Hino, Tokyo 1918512, Japan
[3] Kobe Pharmaceut Univ, Kobe, Hyogo 6588558, Japan
[4] Univ Tokyo, Nucl Sci & Technol Res Ctr, Tokai, Ibaraki 3191106, 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)00222-X
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：
The existence and the average size of foe volume in bisphenol-A polycarbonate (PC), low-density polyethylene (LDPE), poly (2,6-dimethyl-phenyleneoxide)(PPO), and polytetrafluoroethylene (PTFE) were studied by positron annihilation and Xe-129 NMR measurements. The Xe-129 NMR chemical shifts for xenon adsorbed in the polymers indicated that the average pore size of the free volume increased in the following order: PC, LDPE, PPO, and PTFE. This order of the pore size of the free volume agrees well with that estimated from the longest lifetime (rs) of ortho-positronium formed in the polymers. The unique correlation that delta(-1) proportional to r is established between the Xe-129 NMR chemical shift (delta) and the pore size (r), which is deduced from the positron annihilation measurements. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：581 / 585
页数：5
相关论文
共 50 条
  • [21] 129Xe NMR of adsorbed random copolymers.
    Nasreddine, V
    Chijiwa, S
    Reven, L
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2002, 223 : C110 - C110
  • [22] 129Xe NMR -: highly polarized thin films
    Gerhard, P
    Koch, M
    Jänsch, HJ
    COMPTES RENDUS PHYSIQUE, 2004, 5 (03) : 297 - 304
  • [23] 129Xe NMR spectroscopy study of porous cyanometallates
    Lima, E.
    Balmaseda, J.
    Reguera, E.
    LANGMUIR, 2007, 23 (10) : 5752 - 5756
  • [24] Benchtop 129Xe optical polarizer for NMR applications
    Radnatarov, D.
    Kobtsev, S.
    Andryushkov, V.
    ODS 2022: INDUSTRIAL OPTICAL DEVICES AND SYSTEMS, 2022, 12231
  • [25] In vivo hyperpolarized 129Xe NMR spectroscopy in tumors
    Wolber, J
    McIntyre, DJO
    Rodrigues, LM
    Carnochan, P
    Griffiths, JR
    Leach, MO
    Bifone, A
    MAGNETIC RESONANCE IN MEDICINE, 2001, 46 (03) : 586 - 591
  • [26] Probing proteins in solution by 129Xe NMR spectroscopy
    Locci, E
    Dehouck, Y
    Casu, M
    Saba, G
    Lai, A
    Luhmer, M
    Reisse, J
    Bartik, K
    JOURNAL OF MAGNETIC RESONANCE, 2001, 150 (02) : 167 - 174
  • [27] 129Xe NMR study of the dehydroxylation of zeolite HY
    Seidel, A
    Boddenberg, B
    JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1998, 94 (09): : 1363 - 1367
  • [28] 129Xe NMR investigation of catalytic filamentous carbon
    Romanenko, KV
    de la Caillerie, JBD
    Fraissard, J
    Reshetenko, TV
    Lapina, OB
    MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 81 (1-3) : 41 - 48
  • [29] Cryptophane-Folate Biosensor for 129Xe NMR
    Khan, Najat S.
    Riggle, Brittany A.
    Seward, Garry K.
    Bai, Yubin
    Dmochowski, Ivan J.
    BIOCONJUGATE CHEMISTRY, 2015, 26 (01) : 101 - 109
  • [30] XE-129 NMR IN POLYMERS
    MILLER, JB
    RUBBER CHEMISTRY AND TECHNOLOGY, 1993, 66 (03): : 455 - 461
12345