Analytical Sciences

Abstract − Analytical Sciences, 29(4), 401 (2013).

Curing Dynamics of Photopolymers Measured by Single-shot Heterodyne Transient Grating Method
Mika ARAI, Tomomi FUJII, Hayato INOUE, Shota KUWAHARA, and Kenji KATAYAMA
Department of Applied Chemistry, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan
The heterodyne transient grating (HD-TG) method was first applied to the curing dynamics measurement of photopolymers. The curing dynamics for various monomers including an initiator (2.5 vol%) was monitored optically via the refractive index change after a single UV pulse irradiation. We could obtain the polymerization time and the final change in the refractive index, and the parameters were correlated with the viscosity, molecular structure, and reaction sites. As the polymerization time was longer, the final refractive change was larger, and the polymerization time was explained in terms of the monomer properties.