Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7062259 | Thermochimica Acta | 2016 | 8 Pages |
Abstract
Homologous series of crystallisable C8-C22 even-numbered alkane oligomers with either maleate or itaconate monoesters end-groups were synthesized. Their total phase change enthalpy (ÎHtpce) and entropy (ÎStpce) on melting, determined by DSC, show a linear dependence with the number of carbons of the alkyl chain. A comparison was performed with corresponding succinate derivatives. The influence of the end functions on ÎStpce was examined in view of ÎStpce values estimated by the group additivity approach. A fair agreement between the experimental and the estimated entropy values could be demonstrated. Thermogravimetric analysis (TGA) has shown that the maleate oligomers are less stable than the corresponding succinate and itaconate derivatives. This behaviour could be confirmed by the activation energies of the degradation process.
Related Topics
Physical Sciences and Engineering
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Authors
Jean-Victor Richard, Christelle Delaite, Gérard Riess, Anne-Sophie Schuller,