Proton residual dipolar couplings by NMR magnetization exchange in cross-linked elastomers:: determination and imaging

被引：8
|
作者：
Gasper, L [1 ]
Demco, DE [1 ]
Blümich, B [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Makromol Chem, D-52074 Aachen, Germany
来源：
SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1999年 / 14卷 / 02期
关键词：
elastomers; residual dipolar couplings; magnetization exchange; dynamic order parameter; parameter-weighted NMR imaging;
D O I：
10.1016/S0926-2040(99)00012-0
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：
Proton nuclear magnetic resonance (NMR) magnetization exchange is used to investigate residual dipolar couplings in a series of cross-linked poly(styrene-cobutadiene) elastomers. A new model for the dipolar unit is used for the evaluation of the signal decay in magnetization exchange experiments. It takes into account an extended residual dipolar coupling network along the polymer chain. It is shown that in the regime of short mixing times, information about the residual dipolar coupling between methine and methylene protons can be obtained which is not affected by other inter- and intramolecular dipolar couplings. The dynamic order parameter of methine-methylene protons is measured and correlated with cross-link density. This study certifies the quality of a filter for magnetization from residual dipolar couplings which exploit magnetization exchange. The filter can be used to generate contrast in NMR images of heterogeneous elastomers. The first proton NMR parameter image of a dynamic order parameter is presented for a phantom made from poly(styrene-cobutadiene) samples with different cross-link densities. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：105 / 116
页数：12
相关论文
共 50 条
  • [1] Proton residual dipolar couplings by NMR magnetization exchange in cross-linked elastomers: Determination and imaging
    Gasper, L.
    Demco, D.E.
    Blümich, B.
    Solid State Nuclear Magnetic Resonance, 2002, 14 (02): : 105 - 116
  • [2] Effect of residual dipolar interactions on the NMR relaxation in cross-linked elastomers
    Sotta, P
    Fulber, C
    Demco, DE
    Blumich, B
    Spiess, HW
    MACROMOLECULES, 1996, 29 (19) : 6222 - 6230
  • [3] Effect of residual dipolar interactions on the NMR relaxation in cross-linked elastomers
    Universite Paris-Sud, Orsay, Germany
    Macromolecules, 19 (6222-6230):
  • [4] Two-dimensional proton magnetization-exchange NMR spectroscopy in cross-linked elastomers
    Demco, DE
    Hafner, S
    Fulber, C
    Graf, R
    Spiess, HW
    JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (24): : 11285 - 11296
  • [5] Two-dimensional proton magnetization-exchange NMR spectroscopy in cross-linked elastomers
    Max-Planck-Inst fuer, Polymerforschung, Mainz, Germany
    J Chem Phys, 24 (11285-11296):
  • [6] 1H NMR imaging of residual dipolar couplings in cross-linked elastomers:: Dipolar-encoded longitudinal magnetization, double-quantum, and triple-quantum filters
    Schneider, M
    Demco, DE
    Blümich, B
    JOURNAL OF MAGNETIC RESONANCE, 1999, 140 (02) : 432 - 441
  • [7] Selective residual dipolar couplings in cross-linked elastomers by 1H double-quantum NMR spectroscopy
    Graf, R
    Demco, DE
    Hafner, S
    Spiess, HW
    SOLID STATE NUCLEAR MAGNETIC RESONANCE, 1998, 12 (2-3) : 139 - 152
  • [8] Selective residual dipolar couplings in cross-linked elastomers by 1H double-quantum NMR spectroscopy
    Max-Planck-Inst. Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
    Solid State Nucl Magn Reson, 2-3 (139-152):
  • [9] Residual dipolar couplings by 1H dipolar-encoded longitudinal magnetization, double- and triple-quantum nuclear magnetic resonance in cross-linked elastomers
    Schneider, M
    Gasper, L
    Demco, DE
    Blümich, B
    JOURNAL OF CHEMICAL PHYSICS, 1999, 111 (01): : 402 - 415
  • [10] Chemical shift-related artifacts in NMR determinations of proton residual dipolar couplings in elastomers
    Saalwächter, K
    Herrero, B
    López-Manchado, MA
    MACROMOLECULES, 2005, 38 (09) : 4040 - 4042
12345