Cocrystallization behavior of poly(n-docosyl acrylate) with n-docosanoic acid by X-ray and differential scanning calorimetry studies

摘要

Cocrystallization behavior of comb-like poly(n-docosyl acrylate) (PDA) with n-docosanoic acid (C-22) has been studied by means of differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods. The DSC curves of blended samples of neat PDA with C-22 show the characteristic melting endotherms that correspond to the melting of the crystallites. DSC measurements of PDA/C-22 blends also suggest the existence of another crystalline form induced by the addition of the C-22. From the XRD measurements, the existence of hexagonally-packed crystalline lattice and the phase behavior of PDA/C-22 blends at different mole percent are confirmed. Thermal degradation behavior of PDA and its corresponding blends with C-22 is studied by thermogravimetric analysis. (C) 2005 Wiley Periodicals, Inc.