Determination of chain branching in low density polyethylene by 13C nuclear magnetic resonance and infra-red spectroscopy

Pulsed Fourier transform 13C n.m.r. studies clearly demonstrate the presence of ethyl, butyl and longer chain branches in commercial low density polyethylene. The most suitable conditions for the measurement of the relative intensities of the resonance in the 13C spectrum, were determined using a st...

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Bibliographic Details
Published in:Polymer (Guilford) 1976-04, Vol.17 (4), p.345-347
Main Authors: Cudby, M.E.A., Bunn, A.
Format: Article
Language:English
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Summary:Pulsed Fourier transform 13C n.m.r. studies clearly demonstrate the presence of ethyl, butyl and longer chain branches in commercial low density polyethylene. The most suitable conditions for the measurement of the relative intensities of the resonance in the 13C spectrum, were determined using a standard linear long chain hydrocarbon. The 13C spectra of polyethylenes obtained using these parameters, in conjunction with a total methyl content by infra-red spectroscopy allow a quantitative measurement of the number of each branch type to be made.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(76)90193-2