A three-step synthetic route was proposed and tested to obtain a chain-end functional di-sorbitan oleate monomer: First, 1,18-octadec-9-enedioic acid compound was produced by self-metathesis reaction of an oleic acid; then, the 1,18-octadec-9-enoyl dichloride compound was yielded by chlorination of the di-acid with thionyl chloride, and finally, the 1,18-di-sorbitan oleate monomer was yielded by esterification of the dichloride with 1,4-sorbitan. The di-sorbitan oleate monomer was purified and then characterized by FTIR, ¹H-NMR, DSC and TGA to establish its structure and properties. A bio-based polyurethane (PU) was synthesized by reacting the obtained 1,18-di-sorbitan oleate monomer and MDI. Rheological analysis showed that a curing reaction occurs as a significant increase of the storage modulus (G’) and the complex viscosity (η*) at 100 °C. The obtained bio-based PU was characterized by FTIR, TGA and DMA, confirming that 1,18-di-sorbitan oleate is a feasible monomer for synthesizing polyurethanes.

提出了三步合成路线并进行了测试，以获得链端官能的双脱水山梨糖醇油酸酯单体：首先，通过油酸的自我复分解反应制备1,18-十八烷基-9-烯二酸化合物。然后，将二酸用亚硫酰氯氯化，得到1,18-十八烷基-9-烯酰二氯化合物，最后，通过将二氯化物与1酯化，得到1,18-二脱水山梨糖醇油酸酯单体。 4-脱水山梨糖醇。纯化二脱水山梨糖醇油酸酯单体，然后通过FTIR，¹表征H-NMR，DSC和TGA建立其结构和性质。通过使获得的1，18-二脱水山梨糖醇油酸酯单体与MDI反应，合成生物基聚氨酯（PU）。流变学分析表明，在100°C下，固化反应会随着储能模量（G'）和复数粘度（η*）的显着增加而发生。通过FTIR，TGA和DMA对获得的生物基PU进行了表征，证实了1,18-二脱水山梨糖醇油酸酯是用于合成聚氨酯的可行单体。