Preparation and characterization of the crystalline inclusion complexes of α- and γ-cyclodextrins with poly(butylene carbonate)

Poly(butylene carbonate) was found to form crystalline inclusion complexes with a-cyclodextrin and gamma-cyclodextrin, but it did not form crystalline inclusion complex with beta-cyclodextrin. The crystalline inclusion complexes are also called pseudopolyrotaxanes. Thermogravimetric analysis, FTIR spectroscopy, X-ray diffraction, H-1 NMR spectroscopy, 2D NOESY NMR spectroscopy and C-13 cross-polarization magic-angle-spinning NMR spectroscopy were used to characterize the structures and properties of those crystalline inclusion complexes.