Sorbitol derivatives were characterized by FTIR spectroscopy (PerkinElmer, Spectrum GX), NMR spectroscopy (Bruker 400 MHz Advance). The melting temperature of these materials were investigated by DSC (METTER TOLEDO, DSC 1) and melting apparatus. For DSC, the samples were heated from 120 C to 260 C with heating rate of 10 C/min.