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Molecular Crystals and Liquid Crystals Volume 135, 1986 - Issue 3-4
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Original Articles

Molecular Weight Determination of Mesogenic Polyesters Using 1H Nuclear Magnetic Resonance Spectroscopy

Y. Moltchanov Dept. of Chemistry, Carleton University, Ottawa, Canada, KIS, 5B6
,
G. W. Buchanan Dept. of Chemistry, Carleton University, Ottawa, Canada, KIS, 5B6
,
A. Yu. Bilibin Institute of Macromolecular Compounds of the Academy of Sciences of the U.S.S.R., Leningrad, 199004, U.S.S.R.
&
S. S. Skorokhodov Institute of Macromolecular Compounds of the Academy of Sciences of the U.S.S.R., Leningrad, 199004, U.S.S.R.
Pages 213-221 | Received 07 Nov 1985, Published online: 28 Mar 2007
 
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Abstract

A 1H NMR method has been used for the molecular weight determination of mesogenic polydecamethylene-4,4′-fumaroyldioxy-dibenzoates(P DFOB). Experimentally observed and empirically calculated chemical shifts for all non exchangeable protons are in good agreement. The number-average molecular weight has been calculated from the ratio of integral intensities OF resonances due to protons in the chain segments of the polymers to those from terminal protons. The correlation between molecular weight and intrinsic viscosity values is discussed. Results derived from NMR data are compared with those from other methods.

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