Photopyroelectric observation of melting in valeric (C5 : 0), linoleic (C18 : 2), linolenic (C18 : 3) and tricosanoic (C23 : 0) free fatty acids

✍ Scribed by Dadarlat, Dorin; Bicanic, Dane; Gibkes, Jurgen; Surducan, Vasile; Pasca, Aurel

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 205 KB
• Volume: 78
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199810)78:2<182::aid-jsfa101>3.0.co;2-b

✦ Synopsis

Photopyroelectric (PPE) study of some saturated (C5 : 0, and C23 : 0) and unsaturated (C18 : 2 and C18 : 3) free fatty acids was performed in a temperature range that included their melting points. The standard PPE conÐguration was used consistently during the experiment ; the special PPE case requests thermally thick sample and sensor and optically opaque sample. For those fatty acids for which literature data on volume-speciÐc heat were available (C18 : 2, C18 : 3), the behaviour around the melting point of all static and dynamic thermal parameters (speciÐc heat, thermal conductivity, di †usivity and e †usivity) was obtained. Since no data for volume-speciÐc heat of C5 : 0 and C23 : 0 were found in the literature, only the temperature behaviour of the thermal di †usivity was obtained for these specimens.