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. 2020 Oct;26(10):2047-2052.
doi: 10.1007/s12298-020-00880-5. Epub 2020 Sep 15.

Natural rubber identification and characterization in Euphorbia macroclada

Somaye Azadi  1 , Hedayat Bagheri  1 , Behrooz Mohammad Parast  2 , Mahmood Ghorbani-Marghashi  1
Affiliations

Natural rubber identification and characterization in Euphorbia macroclada

Somaye Azadi et al. Physiol Mol Biol Plants. 2020 Oct.

Abstract

Natural rubber is one of the most important polymers produced by plants, which contains cis-1,4-polyisoprene, protein and fatty acids. It has unique properties compared to synthetic rubber and has many different uses in industry. Here, natural rubber of Euphorbia macroclada was characterized due to its abundance in arid areas. Isolation of rubber was done using both acetone and hexane solvents. FT-IR and NMR further characterized and confirmed the structure of rubber as cis-1,4 polyisoprene. GPC analyses showed a molecular weight of 8.180E+2 with polydispersity of 1.287. These data is useful for better understanding of latex composition in family of Euphorbiaceae.

Keywords: E. macroclada; Latex; Natural rubber; Spurge.

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Conflict of interest statement

Conflict of interestThe authors declare that they have no conflict of interest.

Figures

Fig. 1
Fig. 1
Rubber extraction from E. macroclada latex. a Dualization of samples after adding solvent (acetone), b the extracted resin after evaporation of acetone. c The extracted rubber after drying hexane extract
Fig. 2
Fig. 2
Infrared spectroscopy of E. macroclada extracted rubber
Fig. 3
Fig. 3
1HNMR analysis of E. macroclada extracted rubber (left), cis-1,4-polyisoprene formula (right)
Fig. 4
Fig. 4
13CNMR analysis of E. macroclada extracted rubber
Fig. 5
Fig. 5
Molecular weight distribution of E. macroclada extracted rubber by GPC
See this image and copyright information in PMC

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