Fig. 5
Structural characterization of polymers using 13C NMR. 13C NMR spectra focusing on carbonyl (a) and methine carbons (b) of polymers, from which S- and A-centred triads can be analyzed, respectively. Plausible monomer sequences of random copolymers (R1–6) are shown together with their NMR spectra. The predominant triads of P1 could be estimated to be ASA, AAS and AAA by comparison of the peak shapes and peak positions for P1, random copolymers (R1–6) and polyS
