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Multidimensional NMR studies of poly...

Nuamthanom, Anuttra.

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Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers./
Author:	Nuamthanom, Anuttra.
Description:	140 p.
Notes:	Adviser: Peter L. Rinaldi.
Contained By:	Dissertation Abstracts International68-09B.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3280827
ISBN:	9780549224990

Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers.
Nuamthanom, Anuttra.

Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers. - 140 p.

Adviser: Peter L. Rinaldi.

Thesis (Ph.D.)--The University of Akron, 2007.

The comonomer and stereo-sequences of poly(ethylene-co-1-octene) samples with varying 1-octene content and degree of tacticity were investigated using high-temperature (120°C) one- and two- dimensional (1D and 2D) nuclear magnetic resonance (NMR) techniques on a 750 MHz instrument. The techniques used include quantitative 13C NMR, pulsed-field-gradient (PFG) 1H-13C heteronuclear single quantum coherence(gHSQC), heteronuclear multiple bond correlation (gHMBC) and heteronuclear single quantum coherence-total correlation spectroscopy (gHSQC-TOCSY). Diffusion-ordered 2D NMR spectroscopy (DOSY) was used to confirm that the copolymer samples were not mixtures of two copolymers with different MW. Quantitative analysis of octene content was determined from quantitative 13C NMR experiments. The degree of tacticity was established by quantitative volume integration of 2D gHSQC NMR spectra.

ISBN: 9780549224990Subjects--Topical Terms:

586156
Chemistry, Analytical.

Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers.
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020 $a 9780549224990
035 $a (UMI)AAI3280827
035 $a AAI3280827
040 $a UMI $c UMI
100 1 $a Nuamthanom, Anuttra. $3 1263794
245 1 0 $a Multidimensional NMR studies of poly(ethylene-co-1-octene) copolymers and poly(ethylene-co-vinyl acetate-co-carbon monoxide) terpolymers.
300 $a 140 p.
500 $a Adviser: Peter L. Rinaldi.
500 $a Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5916.
502 $a Thesis (Ph.D.)--The University of Akron, 2007.
520 $a The comonomer and stereo-sequences of poly(ethylene-co-1-octene) samples with varying 1-octene content and degree of tacticity were investigated using high-temperature (120°C) one- and two- dimensional (1D and 2D) nuclear magnetic resonance (NMR) techniques on a 750 MHz instrument. The techniques used include quantitative 13C NMR, pulsed-field-gradient (PFG) 1H-13C heteronuclear single quantum coherence(gHSQC), heteronuclear multiple bond correlation (gHMBC) and heteronuclear single quantum coherence-total correlation spectroscopy (gHSQC-TOCSY). Diffusion-ordered 2D NMR spectroscopy (DOSY) was used to confirm that the copolymer samples were not mixtures of two copolymers with different MW. Quantitative analysis of octene content was determined from quantitative 13C NMR experiments. The degree of tacticity was established by quantitative volume integration of 2D gHSQC NMR spectra.
520 $a The comonomer sequence distributions and the resonance assignments of poly(ethylene-co-vinyl acetate-co-carbon monoxide), polyEVC* terpolymer prepared from 13C -labeled carbon monoxide were also investigated using high temperature (120°C) multidimensional (1D, 2D and 3D) NMR experiments on the same spectrometer. The NMR techniques used include 1D-1H, 13C, 2D- gHSQC, gHMBC, gHSQC-TOCSY, 3D-gHCACX and 3D-gHCAC X-HH-TOCSY NMR experiments. With 13C labeling of the polymer combined with high resolution multidimensional NMR experiments, pentad monomer sequence assignments can be made for the carbon monoxide (C)-centered pentads. The degradation of polyEVC* was also examined by 1D and 2D NMR. The NMR spectra show that alpha, beta-unsaturated carbonyl groups are a degradation product in this terpolymer, arising from elimination of acetic acid from CV dyads.
590 $a School code: 0003.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0486
690 $a 0495
710 2 $a The University of Akron. $3 1018399
773 0 $t Dissertation Abstracts International $g 68-09B.
790 $a 0003
790 1 0 $a Rinaldi, Peter L., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3280827