Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/98155
Type: Artigo de periódico
Title: Photoacoustic Measurement Of Thermal Diffusivity Of Polymer Foils
Author: Leite N.F.
Cella N.
Vargas H.
Miranda L.C.M.
Abstract: The photoacoustic measurement of polymer foils, typically 170-200 μm thick, is discussed. It is shown that the measurement based upon the phase lag between the front and rear illuminations is applicable only in a limited range of frequencies from 6 to 12 Hz. The dominant mechanism responsible for the photoacoustic signal, in almost the entire frequency range 10-100 Hz, is proven to be the thermoelastic bending of the foil samples. The thermal diffusivity is then obtained from the frequency dependence of the front-phase illumination data.
Editor: 
Rights: aberto
Identifier DOI: 10.1063/1.337853
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-36549099384&partnerID=40&md5=bef09383fa47320f9e8c0eb40ab3bc56
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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