Publication:
Quantitative analysis of isoprene units in natural rubber and synthetic polyisoprene using 1H-NMR spectroscopy with an internal standard

Issued Date

2015-01-01

Resource Type

Article

ISSN

01429418

DOI

10.1016/j.polymertesting.2015.02.003

Other identifier(s)

2-s2.0-84923872495

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Polymer Testing. Vol.43, (2015), 21-26

Suggested Citation

Surakit Tuampoemsab, Adun Nimpaiboon, Jitladda T. Sakdapipanich Quantitative analysis of isoprene units in natural rubber and synthetic polyisoprene using 1H-NMR spectroscopy with an internal standard. Polymer Testing. Vol.43, (2015), 21-26. doi:10.1016/j.polymertesting.2015.02.003 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/35778

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Title

Quantitative analysis of isoprene units in natural rubber and synthetic polyisoprene using 1H-NMR spectroscopy with an internal standard

Author(s)

Surakit Tuampoemsab
 Adun Nimpaiboon
 Jitladda T. Sakdapipanich

Other Contributor(s)

King Mongkut's University of Technology North Bangkok
 Mahidol University

Abstract

© 2015 Elsevier Ltd. All rights reserved. Isoprene units in natural rubber (NR) and its synthetic analogues were quantified by1H-NMR spectroscopy using polyethylene glycol (PEG) as an internal standard. The effect of PEG and rubber concentrations, molar ratio of rubber/PEG, measuring temperature and scan number on the quantification was investigated to establish the respective working range. Analysis of commercial grades of NR revealed that the differences in 1,4 isoprene content is caused by the production process and feedstock, in which proteins and lipids were found to be the major impurity in NR. Gel fraction of NR has insignificant effect on the measurement of 1,4 isoprene content. Furthermore, the new method was found to produce good results for the quantification of 1,4 and 3,4 units of synthetic polyisoprenes.

Keyword(s)

Chemistry
 Materials Science

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/35778

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Scopus 2011-2015