8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-483-C7-486
Combined standard(SPPE) and inverse(IPPE) photopyroelectric configurations for measurement of dynamic thermal parameters of saturated and unsaturated fatty acidsD. Dadarlat1, H. Visser2, D. Bicanic2, A. Frandas1 and K. van Asselt2
1 Institute for Isotopic and Molecular Technology, P.O. Box 700, 3400 Cluj-Napoca, Romania
2 Laser Photoacoustic Laboratory, Department of Agricultural Engineering and Physics, Wageningen Agricultural University, Bomenweg 4, 6703 HD Wageningen, The Netherlands
Combined SPPE-IPPE method is proposed to obtain thermal parameters (thermal effusivity, diffusivity, conductivity and volume specific heat) of saturated (caproic C10 : 0) and monoenoic unsaturated (oleic C18 : 1, cis) fatty acids. The method was also used to investigate temperature behaviour of thermal parameters (around the melting point) for lauric acid (C12 : 0). The combined SPPE-IPPE approach eliminates problems associated with sample's transparency and thickness control.
© EDP Sciences 1994