Raman scattering investigation of the glaciation process in triphenyl phosphite

Systematic Raman scattering investigations were carried out on TPP during t he isothermal transformations of the supercooled Liquid into the glacial st ate, in the 210-230 K temperature range. From these experiments the glaciat ion process can be interpreted in terms of aborted crystallization. This st udy reveals that the crystallization aborts in a distinctive stage, i.e., i n a glacial state composed of crystallites of the stable crystalline state, characterized by a size strongly dependent on the aging temperature. The s ize of crystallites can be considered in the nanometric or micrometric scal e if the glacial state is prepared, respectively at the low or at high temp erature in the 210-230 K range. The time of transformation into the glacial state is also observed as drastically dependent on the aging temperature.