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Impact of the dispersion quality of TiO 2 pigments in coatings on their optical properties and weathering resistance
Author(s) -
Gross Peter,
Schmelzer Josef
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200209)187:1<641::aid-masy641>3.0.co;2-h
Subject(s) - gloss (optics) , particle size distribution , haze , materials science , composite material , reflectivity , coating , particle size , diffuse reflectance infrared fourier transform , dispersion (optics) , analytical chemistry (journal) , optics , chemical engineering , chemistry , chromatography , physics , engineering , organic chemistry , biochemistry , catalysis , photocatalysis
The dispersion status achievable with different dispersing equipment of an acrylic/MFA stoving enamel was monitored in the conventional way via the Hegman‐gauge and gloss, gloss haze and tinting strength measurements. Then the same drawdowns of the cured coating were submitted to diffuse reflectance spectroscopy. Original and normalised remission curves were then compared and the distribution coefficients emerging from these measurements were correlated to the conventional methods for monitoring the dispersion process. The interpretation of the spectra with respect to the particle size, particle size distribution and the concentration of particles of a particular size was achieved on a qualitative and comparative way.