What question did this study set out to answer?

The study aims to investigate the void closure kinetics during the film formation of high-T latex particles using fluorescence methods.

March 7, 2026

Fluorescence method of studying void closure kinetics during film formation from high-T latex particles

Key Points

The study aims to investigate the void closure kinetics during the film formation of high-T latex particles using fluorescence methods.
Utilized steady-state fluorescence and photon transmission techniques in the study.
Prepared latex films from pyrene-labeled poly(methyl methacrylate) particles.
Measured fluorescence intensity after each annealing step over 10-minute intervals.
Applied the Vogel—Fulcher equation to derive void closure times.
Established a relationship between void closure time and fluorescence intensity.
Determined the viscosity constant B to be 11 × 10^3 K.
Observed changes in optical clarity throughout the film formation process.

Abstract

Void closure process due to viscous flow was studied during film formation from high-T latex particles. Steady-state fluorescence and photon transmission techniques were used to probe the evolution of optical clarity during film formation. The latex films were prepared from pyrene (P)-labeled poly(methyl methacrylate) particles and annealed in 10-min time intervals above glass transition temperature. Fluorescence intensity from P was measured after each annealing step. A relation for void closure time versus fluorescence intensity was derived, using the Vogel—Fulcher equation. Viscosity constant B was measured from the above relation and found to be as 11 × 103 K. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 655–661, 1997

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