INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
capítulos de libros
Título:
Particle Size Distribution. Main Definitions and Measurement Techniques
Autor/es:
GUGLIOTTA, L. M.; CLEMENTI, L. A.; VEGA, J. R.
Libro:
Measurement of Particle Size Distribution of Polymer Latexes
Editorial:
Research Signpost
Referencias:
Lugar: Kerala, India; Año: 2009; p. 1 - 58
Resumen:
The importance of the particle size distribution (PSD) of
polymer latexes is first discussed; and definitions of differential /
cumulative distributions and average diameters are presented. Main
analytical techniques for latex PSD measurement are classified.
Some ensemble techniques such as turbidimetry (T), elastic light
scattering (ELS), and dynamic light scattering (DLS) are thorougly
treated, and evaluated by considering the characterization of industrial
latexes of unknown composition. The effect of uncertainties in the
particle refractive index (PRI) on the PSD is also studied. A brief
discussion on problems associated to the PSD measurement by
standard electron microscopy (EM) is presented, together with the
analysis of latex nanoparticles by atomic force microscopy (AFM),
and the applicattion of new EM developments for the characterization
of wet samples in their environment. Also, the principles of main
fractionation techniques are briefly discussed, including sedimentation,
unpacked/packed column chromatography, and field flow fractionation
methods, together with an analysis of their detection systems, with
emphasis on the estimation of the PSD ordinates from singlewavelength
T measurements.