Abstract
The crystal phase, particle size, and morphology of organic pigments play an important role on the surface coating properties, such as substrate absorbency, surface smoothness, the light scattering properties, gloss, roughness, coating power, rheology and stability upon storage, etc. This paper aims to study the effect of photo acid generator (PAG) containing the stibium ion on the crystal structure and morphology of the regenerated pigment from the precursor of indanthrone in organic solvent. As measured from ultraviolet–visible spectroscopy and Fourier transform infrared spectroscopy, it was discovered that adding PAG accelerated the conversion of latent pigment to regenerated pigment. In addition, field emission scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction analysis indicated that, as the amount of PAG increased, the regenerated pigment lost its crystal structure, which particle size is increased from 1 to 4 μm and morphology is changed from a bar like form to a cubic and spherical form.
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