Molecular dynamics of poly(ethylene terephthalate)/poly(phenylene sulfide) nanocomposites with barium titanate

Open Physics ◽  
2011 ◽  
Vol 9 (2) ◽  
Author(s):  
Monika Konieczna ◽  
Aneta Woźniak-Braszak ◽  
Krystyna Hołderna-Natkaniec ◽  
Jan Jurga
Keyword(s):  
Barium Titanate ◽  
Ethylene Terephthalate ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Spin Lattice ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Phenylene Sulfide

AbstractThe relaxation processes and the properties of polymer/ceramic nanocomposites have been studied by the 1H nuclear magnetic resonance methods. Nanocomposites of poly(ethylene terephthalate) PET and poly(phenylene sulfide) PPS with 0.25, 2.5 and 5% wt. barium titanate BT were prepared using a twin screw extruder and injection moulding machine. The spin-lattice relaxation time T1, second moment M2 and the motional parameters as e.g. the activation energies in the nanocomposites were investigated.

Proton spin-lattice relaxation time studies and atom–atom non-bonded potential calculations on ferrocenecarbaldehyde (η5-C5H5)Fe(η5-C5H4CHO)

1987 ◽  
Vol 65 (8) ◽  
pp. 1940-1944 ◽  
Author(s):  
Richard J. Pazur ◽  
D. F. R. Gilson ◽  
Pierre D. Harvey ◽  
Ian S. Butler
Keyword(s):  
Lattice Relaxation ◽  
Aldehyde Group ◽  
Lattice Relaxation Time ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Relaxation Methods ◽  
Spin Lattice ◽  
Molecular Rotations ◽  
Atom Potential

The barriers to molecular rotations in the low temperature crystal phase of ferrocenecarbaldehyde, (η5-C5H5)Fe(η5-C5H4CHO), have been measured using proton spin-lattice relaxation methods and assigned to different motions, based on the results of non-bonded atom–atom potential calculations. The principal relaxation is interpreted in terms of a Cole–Davidson distribution of correlation times, and assigned to rotation of the unsubstituted ring, with an activation energy of 15.3 kJ mol−1. Other relaxation processes, observed via T1D measurements, include rotation of the aldehyde group and oscillations of the whole molecule, with barriers of 42.4 and 25.6 kJmol−1, respectively.

NUCLEAR SPIN-LATTICE RELAXATION TIME IN TIN

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1215-C6-1216
Author(s):  
H. Ahola ◽  
G.J. Ehnholm ◽  
S.T. Islander ◽  
B. Rantala
Keyword(s):  
Relaxation Time ◽  
Nuclear Spin ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Nuclear Spin Lattice Relaxation

Protron spin-lattice relaxation time of duchenne dystrophy skeletal muscle by magnetic resonance imaging

1988 ◽  
Vol 11 (2) ◽  
pp. 97-102 ◽  
Author(s):  
Kiichiro Matsumura ◽  
Imaharu Nakano ◽  
Nobuo Fukuda ◽  
Hiroo Ikehira ◽  
Yukio Tateno ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Skeletal Muscle ◽  
Relaxation Time ◽  
Magnetic Resonance ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Resonance Imaging ◽  
Duchenne Dystrophy ◽  
Spin Lattice

Determination of chemical shift anisotropy tensor and molecular correlation time of proton pump inhibitor omeprazole by solid state NMR measurements

2020 ◽  
Vol 44 (44) ◽  
pp. 19393-19403
Author(s):  
Krishna Kishor Dey ◽  
Manasi Ghosh
Keyword(s):  
Correlation Time ◽  
Chemical Shift Anisotropy ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Structure And Dynamics ◽  
Molecular Correlation ◽  
Anisotropy Tensor

The correlation between the structure and dynamics of omeprazole is portrayed by extracting CSA parameters through the 13C 2DPASS CP-MAS SSNMR experiment, site specific spin–lattice relaxation time by Torchia CP experiment, and calculation of the molecular correlation time.

scholarly journals Tunneling Spectroscopy by Nuclear Magnetic Resonance: Analysis of Rotational Tunneling in Solid Pentamethylbenzene

1985 ◽  
Vol 40 (11) ◽  
pp. 1075-1084
Author(s):  
W. T. Sobol ◽  
K.R. Sridharan ◽  
I. G. Cameron ◽  
M. M. Pintar
Keyword(s):  
Frequency Dependence ◽  
Lattice Relaxation ◽  
Time Correlation ◽  
Lattice Relaxation Time ◽  
Polarization Transfer ◽  
Spin Lattice Relaxation ◽  
Transfer Model ◽  
Nuclear Magnetic Resonance Analysis ◽  
Spin Lattice ◽  
Resonance Analysis

The frequency dependence of the spin-lattice relaxation time T1 was measured at three temperatures near one of the Zeeman-tunneling level matching resonances for pentamethylbenzene. These measurements are correlated with 71 temperature dependence data from the literature. It is shown that the frequency dependence of the Zeeman-torsion coupling time cannot be explained in terms of the semiclassical perturbation theory using time correlation functions. A three bath polarization transfer model is also employed and the applicability of both models discussed. Zeeman-torsion coupling is further investigated using a saturation sequence and the results are compared with the predictions of the three bath polarization transfer model.

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