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13C CP/MAS NMR spectra of native β CD (a), β CD/PCL100 polymer (b), and β CD/PLA100 polymer (c) obtained at 140 °C: Contact time of 20 ms (b) and 8 ms (a,c). The numbering of β-CD carbons takes into account the possible substitution of hydroxyl groups, C-1 to C-6 for unsubstituted and C-1′ to C-6′ for substituted, at any rate.
