CRYSTALLIZATION OF 1, 4-DIAMINOANTHRAQUINONE DISPERSE DYE IN POLYSTYRENE

The quenched and heat-treated films of polystyrene containing 1, 4-diaminoanthraquinone dye were prepared, the physical properties of which were measured. It was confirmed by X-ray analysis and differential thermal analysis that the dye molecules in polystyrene crystallized by heat-treatment. The crystallization of the dye molecules occurred above the glass transition temperature of polystyrene. This crystallization was more prominent in films having higher content of the dye. The maximum temperature of loss modulus decreased with increasing dissolved (non-crystallized) dye content. This result is explained by the plasticizing effect of the dye molecules.