Abstract

Modification of vegetable oil into monomers and polymers is essential nowadays, considering petroleum depletion. The reaction of vegetable oils with maleic anhydride is widely known, and the final product can be obtained by a thermal conventional route, which requires 3 h for total reaction. The aim of this work was to provide a more efficient, faster, and cleaner alternative synthetic route assisted by microwave irradiation. A comprehensive experimental design indicated that it is possible to obtain higher anhydride incorporation onto vegetable oil structure with only 15 min of microwave irradiation, a reaction time 12 × less than the thermal conventional route, as well as 6 × less energy consumption. Furthermore, the higher performance was supported by the Mid-Infrared Spectroscopy (MIR), Nuclear Magnetic Resonance (¹H-NMR), and UV–Vis analyses. The viscosity and colorimetric analyses were used to determine the aspect of modifications of final product. Thermogravimetry (TG) is fundamental to afford thermal stability and steps of mass loss, and Differential Scanning Calorimetry (DSC) provides information about melting point, which proves the incorporation of the anhydride.

中文翻译：

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微波辅助植物油基单体的合成：一条更清洁，更快，更节能的途径

摘要

考虑到石油枯竭，如今将植物油改性为单体和聚合物非常重要。植物油与马来酸酐的反应是众所周知的，并且最终产物可以通过常规的热途径获得，该过程需要3小时的总反应时间。这项工作的目的是在微波辐射的辅助下提供一种更有效，更快，更清洁的替代合成途径。全面的实验设计表明，仅用15分钟的微波照射，就可以将更高的酸酐掺入到植物油结构中，反应时间比常规的热途径少12倍，能耗也低6倍。此外，中红外光谱（MIR），核磁共振（¹H-NMR）和UV-Vis分析。粘度和比色分析用于确定最终产品的改性方面。热重法（TG）是提供热稳定性和质量损失步骤的基础，差示扫描量热法（DSC）提供有关熔点的信息，证明了酸酐的掺入。