Fiber optic dynamic light scattering from concentrated dispersions. 3: Particle sizing in concentrates

Area of Science:

• Polymer Chemistry
• Materials Science
• Analytical Chemistry

Background:

• Latex emulsion polymerization is a crucial industrial process.
• Monitoring particle size in situ is essential for process control.
• Traditional dynamic light scattering (DLS) requires sample dilution, limiting real-time analysis.

Purpose of the Study:

• To evaluate the efficacy of fiber optic dynamic light scattering (FODLS) for in situ particle size measurement during latex polymerization.
• To compare FODLS measurements with conventional DLS results.
• To determine the applicability of FODLS for highly concentrated samples.

Main Methods:

• Utilized fiber optic dynamic light scattering (FODLS) to monitor particle size during latex emulsion polymerization.
• Performed comparative dynamic light scattering (DLS) measurements on diluted samples.
• Tracked particle size evolution throughout the polymerization reaction.

Main Results:

• FODLS measurements demonstrated strong agreement with conventional DLS results.
• The technique successfully tracked the growth of latex particles in real-time.
• FODLS proved effective for analyzing highly concentrated polymerization samples.

Conclusions:

• Fiber optic dynamic light scattering (FODLS) is a reliable method for in situ particle size measurement in latex polymerization.
• FODLS overcomes the limitations of sample dilution required by traditional DLS.
• This technique is well-suited for monitoring concentrated colloidal systems like those in latex production.