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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

<TEX>$A^{13}$</TEX> CNMR Determination of Monomer Composition in EP Copolymers, EPB and EPDM Terpolymers

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.1, pp.91-102
Lee, Kang-Bong
An, Seong-Uk
Rhee, Jae-Seong
Kweon, Jeehye
Choi, Young-Sang
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Abstract

The monomer compositions in a series of propylene heterophasic copolymer, propylene random copolymer, propylene random terpolymer and ethylene-propylene-ENB terpolymer have been determined from <TEX>$^{13}C-NMR$</TEX> spectra. The simplified and highly resolved <TEX>$^{13}C-NMR$</TEX> spectra made it possible to assign unambiguousely and calculate the monomer composition. A complete sets of NMR chemical shift assignments and the way to measure the quantity of monomer are newly given in diverse polymers. Furthermore complete dyad, triad, tetrad and pentad distributions have been able to be determined. These NMR quantitative analytical results for monomer compostition have consistent with those from Infrared spectral data.

keywords
Polypropylene, <TEX>$^{13}C-NMR$</TEX>


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