Fig. 3

Solid-state NMR spectra: (a) S:G:H (50:50:0), (b) S:G:H (47.5:47.5:5), (c) S:G:H (45:45:10), (d) S:G:H (40:40:20). Subtraction spectra: (e) S:G:H (40:40:20)–S:G:H (50:50:0), (f) S:G:H (45:45:10)–S:G:H (50:50:0), (g) S:G:H (47.5:47.5:5)–S:G:H (50:50:0), and (h) H polymer spectrum