Quantifying rubber degradation using NMR

Somers, A.E., Bastow, T.J., Burgar, M.I., Forsyth, M. and Hill, A.J. 2000, Quantifying rubber degradation using NMR, Polymer degradation and stability, vol. 70, no. 1, pp. 31-37.

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Title Quantifying rubber degradation using NMR
Author(s) Somers, A.E.
Bastow, T.J.
Burgar, M.I.
Forsyth, M.
Hill, A.J.
Journal name Polymer degradation and stability
Volume number 70
Issue number 1
Start page 31
End page 37
Publisher Elsevier Ltd.
Place of publication Oxford, England
Publication date 2000
ISSN 0141-3910
1873-2321
Keyword(s) Rubber degradation
NMR spectroscopy
Summary Ageing can lead to the degradation of the tensile properties of natural rubber. The ageing process causes changes in the polymer segmental motion as well as the chemical structure, both of which can be monitored using nuclear magnetic resonance (NMR) spectroscopy. This work demonstrates that NMR can quantify rubber degradation due to ageing, and also that relatively simple NMR equipment can be used. This simpler equipment can be made portable and so could give a simple and fast indication of the condition of rubber in service. The 1H NMR transverse relaxation time, T2, and the 13C NMR spectrum using cross polarization and magic angle spinning (CP MAS) for samples taken at various levels of a degraded natural rubber liner were compared. These experiments showed that, as the level of degradation increased, the 1H NMR transverse relaxation time decreased. The 13C spectra showed considerable peak broadening, indicative of decreased mobility with increased level of degradation as well as the presence of degradation products. Further investigations using lower powered NMR equipment to measure the 1H NMR transverse relaxation times of two different series of natural rubbers were also performed. This work has shown that this simpler method is also sensitive to structural and mechanical property changes in the rubber. This method of monitoring rubber degradation could lead to the non-destructive use of NMR to determine the condition of a part in service.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2000, Elsevier Science Ltd. All rights reserved.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030257

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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