Photoacoustic Characterization of PC/PMMA blends doped with Eu(acac)$_3$

D.T. Dias; R. Bonzanini; A.F. Rubira; E.C. Muniz; A.N. Medina; M.L. Baesso; L.A.O. Nunes; A.C. Bento

doi:doi:10.1051/jp4:2005125090

Numéro		J. Phys. IV France Volume 125, June 2005


Page(s)		387 - 390
DOI		https://doi.org/10.1051/jp4:2005125090

J. Phys. IV France 125 (2005) 387-390
DOI: 10.1051/jp4:2005125090

Photoacoustic Characterization of PC/PMMA blends doped with Eu(acac)₃

D.T. Dias¹, R. Bonzanini², A.F. Rubira², E.C. Muniz², A.N. Medina¹, M.L. Baesso¹, L.A.O. Nunes³ and A.C. Bento¹

¹ Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-Paraná 87020-900, Brazil
² Departamento de Química, Universidade Estadual de Maringá, Av. Colombo 5790, Brazil
³ Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil

Abstract
Samples of PC/PMMA blend having proportion 6/4, 4/6 and 2/8 were doped with acetyl-acetonate of Eu(acac)₃ having concentrations of 0-16%. Through Photoacoustic Spectroscopy (PAS) the interaction of Eu³⁺ with the blends was studied using the visible range 200-530 nm, monitoring a wide absorption band from 280 to 320 nm, where results pointed that 2/8 blend presents the highest absorption. Preliminary luminescent emission showed higher emission for lower Eu(acac)₃ amounts and suggests that the 2/8 blend as more efficient at 615 nm. In addition, it is presented a study of thermal diffusivity and heat capacity evolution related to the doping amount for all blend proportions. Normalized thermal diffusivity is higher for 2/8 blend ( $\alpha_{\rm mean} \sim 5.64 \times 10^{-3}$ cm²s^-1) and the specific heat was almost constant (c $_{\rm p(mean)}\sim 1.66$ Jg^-1K^-1).

Photoacoustic Characterization of PC/PMMA blends doped with Eu(acac)3

Photoacoustic Characterization of PC/PMMA blends doped with Eu(acac)₃