“…The C1 carbon resonances in statistical S/MMA copolymers can be divided into three peaks, XЉ, YЉ and ZЉ which correspond to the 10 different configurational arrangements of the styrene-centered triads. The second region, the ␣OCH 3 main chain resonances, shows four peak areas designated as A, B, Tables III and IV of the original article. 40 For BA/MMA system the variation of the microstructure copolymers of various molecular weights was studied via 13 C NMR, devoted mainly to an analysis of the carbonyl patterns. Thus Figure 7 shows experimentally observed peak areas of the carbonyl carbon resonances (d ϭ 180 -173 ppm), divided into seven resonance signal groupings, according to the assignments of Aerdts et al 41 The peaks I, II, IV, and VI correspond to different configurational arrangements of MMA-centered triads, and the peaks areas III, V, and VII correspond to the sequences and configurations of BA-centered triads (see Table III in the original article 41 ).…”