J. Phys. IV France 125 (2005) 669-672
Self-normalized photoacoustic methodology for thermal diffusivity measurements of transparent polymer foilsJ.A. Balderas-López1, M.R. Jaime-Fonseca2, E. San Martín2 and J.L. Pichardo3
1 UPIBI-IPN, Avenida Acueducto S/N, Col. Barrio la Laguna, CP 07340, Mexico, DF, Mexico
2 CICATA-IPN, Av. Legaria 694, Col. Irrigación, CP 11500, Mexico, DF, Mexico
3 Centro de Investigación en Optica, Loma del Bosque 115, CP 37150, León, Gto., Mexico
The analytical solution for the one-dimensional heat diffusion problem for a two-layer system, in the surface absorption model, is used to provide of a self-normalized photoacoustic methodology for thermal diffusivity measurements of transparent polymer foils. The implementation of this method involving linear fits requires one face of the sample to be opaque by means of a thin metal layer. Two different materials were examined using the proposed methodology: acetate and PVDF polymer foils. Good agreement with values reported in the literature was found.
© EDP Sciences 2005