Institut Charles Gerhardt Montpellier-UMR 5253-CNRS, Université Montpellier, ENSCM⁻240 Avenue Emile Jeanbrau, CEDEX 5, 34296 Montpellier, France.
Molecules. 2018 Oct 23;23(11):2739. doi: 10.3390/molecules23112739.
The development of epoxy thermosets from renewable resources is of paramount importance in a sustainable development context. In this paper, a novel bio-based epoxy monomer derived from limonene was synthesized without epichlorohydrine and characterized. In fact, this paper depicts the synthesis of bis-limonene oxide (bis-LO). However, intern epoxy rings generally exhibit a poor reactivity and allow reaction with anhydride. Therefore, we used a reaction model with hexahydro-4-methylphthalic anhydride to compare reactivity of terminal and interepoxy functions. We also studied the influence of methyl group on intern epoxy functions. Furthermore, the influence of epoxy:anhydride stoichiometry and initiator amount was studied. These studies allow to propose an optimized formulation of bis-LO. Finally, a bis-LO-based thermoset was obtained and characterized.
从可再生资源开发环氧树脂热固性塑料在可持续发展的背景下至关重要。在本文中，我们合成了一种新型的来源于柠檬烯的生物基环氧树脂单体，该单体的合成过程中不使用表氯醇，并对其进行了表征。实际上，本文描述了双柠檬烯氧化物（bis-LO）的合成。然而，内部环氧环通常表现出较差的反应性，并且允许与酸酐反应。因此，我们使用了一个带有六氢-4-甲基邻苯二甲酸酐的反应模型来比较末端环氧基和内部环氧基的反应性。我们还研究了甲基对内部环氧基的影响。此外，还研究了环氧：酸酐的化学计量和引发剂用量的影响。这些研究为双-LO 提出了一个优化的配方。最后，得到了一种基于双-LO 的热固性塑料，并对其进行了表征。
