Preparation and Characterization of Inclusion Complexes of Poly(dimethylsiloxane)s with γ-Cyclodextrin Without Utilizing Sonic Energy

Abstract

$\upgamma -$cyclodextrin ($\upgamma$-CD) formed inclusion complexes with poly(dimethylsiloxane)s (PDMS) under sonic energy and the products were crystalline compounds. In this study an inclusion complex between PDMS and $\upgamma$-CD was synthesized at room temperature in the presence of light and mixing, in the absence of light and in the absence of mixing. These inclusion complexes (ICs) were characterized by XRD, DSC, ¹H NMR, UV–Vis and FT-IR spectroscopy. The findings suggest that the reaction conditions change the crystalline structure and mole ratios of the complexes (monomer unit/$\upgamma$-CD) determined by ¹H NMR spectroscopy for all of the ICs with $\upgamma$-CD; which is 2 at room temperature, 1.5 under sonic energy, 3 without light and mixing. The UV–Vis results indicate an IC between $\upgamma$-CD and PDMS.