A comparative study of the thermal properties of homologous series of crystallisable n-alkyl maleate and itaconate monoesters
作者:Jean-Victor Richard、Christelle Delaite、Gérard Riess、Anne-Sophie Schuller
DOI:10.1016/j.tca.2015.10.015
日期:2016.1
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 (ΔHtpce) and entropy (ΔStpce) 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
摘要 合成了具有马来酸酯或衣康酸酯端基的可结晶C8-C22偶数烷烃低聚物的同源系列。它们的总相变焓 (ΔHtpce) 和熔化时的熵 (ΔStpce),由 DSC 测定,显示出与烷基链碳数的线性相关性。与相应的琥珀酸酯衍生物进行了比较。鉴于通过组可加性方法估计的 ΔStpce 值,检查了端函数对 ΔStpce 的影响。可以证明实验和估计熵值之间的公平一致性。热重分析 (TGA) 表明,马来酸酯低聚物不如相应的琥珀酸酯和衣康酸酯衍生物稳定。这种行为可以通过降解过程的活化能来证实。