Abstract
The amplitude and phase of the PPE signal for a strongly scattering sample were calculated using a four-flux model. The sensitivity of both PPE amplitude and phase with respect to the thermal properties and water content of the sample were calculated together with the correlations between the parameters. We show that the water content of a sample can be estimated from the signal amplitude, provided the availability of an a priori knowledge of the optical parameters' dependence on the water content. Once the optical characterization is completed, the phase signal can be used for the thermal properties evaluation. The experimental values of the thermal parameters depend on composition, structure and water content. The difference between the results obtained by the photothermal method and those obtained by DSC and Alambeta methods is discussed.
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