Cocrystallization phenomenon of polyoxymethylene blend samples between the deuterated and hydrogenated species

Abstract

The phenomenon of cocrystallization between the deuterated (D) and hydrogenated (H) species of a series of polyoxymethylene blends with various H/D ratios has been established on the basis of the detailed analysis of thermal and infrared (IR) spectral data. The melting and crystallization temperatures were found to shift continuously toward a higher temperature with an increase in the D content. The IR spectra were found to change remarkably depending on the H/D blend content. Both the thermal and the IR spectral observations definitely indicated the cocrystallization between the H and D chains in the common crystallite. These continuous changes could be interpreted by assuming that the arrays of the H and D chains in crystal lattice are random. Cocrystallization phenomenon between the deuterated (D) and hydrogenated (H) species of a series of polyoxymethylene blends with various H/D ratios has been established on the basis of the detailed analysis of thermal and infrared (IR) spectral data. The melting and crystallization temperatures were found to shift continuously toward higher temperature side, with an increase of the D content. The IR spectra were found to change remarkably depending on the H/D blend content. These continuous changes have been interpreted reasonably by assuming the random arrays of the H and D chains in the crystal lattice.