Abstract
The mixing state of polymer blends including the blend with block copolymers were analyzed by “crystallization dynamics method” using DSC and DSC-FTIR methods. The nucleation rate (N*), the crystal growth rate (G*) and the growth rate of conformation (Gc*) of crystalline portion in blends were evaluated from the DSC endothermic peak and the absorbance change at a given wavenumber of IR spectra observed during the isothermal crystallization. The relationship between blend fraction and the chemical potential function evaluated from the degree of super-cooling at a given G* showed the interaction between polymers and the position of co-existence curve in the phase diagram. The relationship between G* and Gc* gave the concentration fluctuation of blend fraction in the partially miscible phase. The crystallization dynamics method evaluated the mixing state in the nano-meter scale phase formed by amphiphilic block copolymer blends.
