Phase behaviour of blends with mesophase components

Temperature transitions and structural transformations were studied for ble nds of two thermotropic mesophase cyclolinear polymethylsiloxanes with line ar PDMS of various molecular weights by means of DSC, optical polarizing mi croscopy, and optical interferometry. Compatibility of the components which depends on the chemical structure of cyclolinear polymethylsiloxanes, mole cular weight of PDMS, composition, and temperature affect formation of meso phase in cyclolinear polymethylsiloxanes. The most interesting aspect of th e phase behaviour consists in the fact that it is possible to reach compati bility of the components in the mesomorphic state for the blends of two cyc lolinear polymethylsiloxanens due to various annealing regimes in one-phase molten state.