Analysis of Chemical Composition and Sequence Distribution

S = all secondary carbons T = all tertiary carbons P = all primary carbons 

Peak No. Carbon Type Chemical Shift Sequence Integration Limit 

Reproduced with permission from S.D. Martino and M. Kelchtermans Journal of Applied Science, 1995, 56, 1781, Table 2. Copyright 1995, John Wiley Sons  

The composition analysis of SBR, i.e., styrene, czs-1,4, trans-1,4 and 1,2 (vinyl) units, has been carried out by 13C-NMR based on signal assignments indicated in Table 11.2. The integrated intensities of regions A to I are used to calculate percent composition by using following equations [17]. 

Reproduced with permission from N.G. Walsh, J.K. Hardy and P.L. Rinaldi, Applied Spectroscopy, 1997, SI, 889, Table 1. Copyright 1997, Society for Applied Spectroscopy  

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