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5
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2642643683
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Trans is also known as (fully staggered) anti or antiperiplanar, and gauche is also known as synclinal. The trans conformation of PET is shown in Fig. 1
-
Trans is also known as (fully staggered) anti or antiperiplanar, and gauche is also known as synclinal. The trans conformation of PET is shown in Fig. 1.
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8
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Nuclear Magnetic Resonance in One and Two Dimensions
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Ernst, R.R.1
Bodenhausen, G.2
Wokaun, A.3
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33
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2642680774
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The 2D spectra were rotated by 90° from the traditional representation to simplify the comparison of the intensity patterns along the double-quantum dimension
-
The 2D spectra were rotated by 90° from the traditional representation to simplify the comparison of the intensity patterns along the double-quantum dimension.
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34
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2642711659
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note
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1 components yielded 3 ± 2.5% crystallinity.
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35
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2642713280
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The trans fraction of the amorphous phase was obtained as (18.5% - 5%)/0.95 = 14%
-
The trans fraction of the amorphous phase was obtained as (18.5% - 5%)/0.95 = 14%.
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36
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2642609425
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The sample obtained by crystallizing the amorphous PET at 160°C for 2 hours had a crystallinity of 32 ± 4% by thermal analysis and 28 ± 4% by CP-MAS NMR. WAXS showed strong crystalline reflections
-
The sample obtained by crystallizing the amorphous PET at 160°C for 2 hours had a crystallinity of 32 ± 4% by thermal analysis and 28 ± 4% by CP-MAS NMR. WAXS showed strong crystalline reflections.
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37
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2642645352
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note
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13C spectrum was attenuated by 0.88 during the cross-polarization spin lock of 0.5 ms. Thus, the 47/ 53 (±6) trans/gauche ratio found in the spectrum had to be corrected slightly to 44/56 (±6).
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39
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2642701663
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H. F. Mark et al., Eds. Wiley, New York
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D. C. Clagett, in Encyclopedia of Polymer Science & Engineering, H. F. Mark et al., Eds. (Wiley, New York, 1989), vol. 6, pp. 114-115; J. Y. Jadhav and S. W. Kantor, in ibid., vol. 12, p. 219.
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Clagett, D.C.1
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2642703387
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D. C. Clagett, in Encyclopedia of Polymer Science & Engineering, H. F. Mark et al., Eds. (Wiley, New York, 1989), vol. 6, pp. 114-115; J. Y. Jadhav and S. W. Kantor, in ibid., vol. 12, p. 219.
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Encyclopedia of Polymer Science & Engineering
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Kantor, S.W.2
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Springer-Verlag, New York
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G. Strobl, The Physics of Polymers (Springer-Verlag, New York, 1996), pp. 169-172.
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Spiess, H.W.4
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44
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2642644516
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note
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Generous financial support for K.S.-R. by a Beckman Young Investigator Award is gratefully acknowledged. Partial support was also provided by the NSF Materials Research Science and Engineering Center and by NSF grant DMR-9703916. K.S.-R. thanks M. Hong for stimulating discussions on data quantification.
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