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. 2021 Mar 9;13(5):838. doi: 10.3390/polym13050838

Figure 4.

Figure 4

Aliphatic (a) and olefinic (b) regions of 13C NMR spectra (TCDE, 25 °C, 400 Mhz) of PMI, synthesized at different myrcene:isoprene ratios. D) M:I (mol/mol) = 70:30 (run 15, Table 2); E) M:I (mol/mol) = 50:50 (run 16, Table 2); F) M:I (mol/mol) = 30:70 (run 17, Table 2). * Signals attributed to head-to-head and tail-to-tail regio-irregular 1,4 M units.