期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 652, 期 -, 页码 1685-1692出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2023.08.197
关键词
Turbidity spectroscopy; Particle size measurement; Emulsion polymerization; Wavelength exponent
Particle size and particle size distribution are important properties of polymer latexes that affect film formation and rheological properties. Turbidity spectroscopy is used to measure the particle size of nanoparticles in dispersed media, and wavelength exponent based calibration curves can successfully monitor the particle size during the polymerization process.
Particle size and particle size distribution (PSD) are important properties of polymer latexes because they strongly affect the film formation and the rheological properties of the latexes. Thus, monitoring the particle size is of paramount importance during the production of waterborne polymeric dispersions, for which online/inline measurements of the particle size are required. Herein, turbidity spectroscopy (TUS) is used to measure the particle size of nanoparticles in dispersed media. Calibration curves based on a modified wavelength exponent method are introduced and assessed to monitor the evolution of a broad range of particle sizes in seeded sem-ibatch emulsion polymerizations of methyl methacrylate, butyl acrylate, methacrylic acid (MMA/BA/MAA 51/ 47/2) terpolymers. It is shown that the wavelength exponent based calibration curves can be successfully used to retrieve the particle size during the polymerization process.
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