This study reports the synthesis of a kind of biomass-based plasticizer: epoxy eleostearic acid catechol ester (EEAE), originating from biomass resources eleostearic acid and catechol by way of esterification and epoxidation. Its effect on the plasticization, mechanical properties and migration resistance of poly(vinyl chloride) (PVC) film was investigated. The results showed that epoxy groups were covalently bonded on the branched chains of EEAE and the epoxy groups and ester groups of EEAE formed hydrogen bonds with the α-hydrogen of PVC, which had a better plasticizing effect on PVC than commercial diisobutyl phthalate. When the mass of EEAE increased from 0.2 to 0.8 g in PVC films, the glass transition temperature (T _g) decreased from 86.7 to 54°C and the elongation at break of the PVC films increased from 124.24 ± 6.00 to 321.12 ± 6.13%, while the tensile strength decreased from 40.12 ± 1.23 MPa to 19.67 ± 2.33 MPa, which illustrated that EEAE had an efficient plasticizing effect on PVC. The plasticizer showed marginal resistance to volatilization and solvent extraction. The thermal stability and compatibility of PVC films plasticized with EEAE were also improved.

中文翻译：

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桐酸基增塑剂的合成及应用

本研究报道了一种生物质基增塑剂：环氧桐酸儿茶酚酯（EEAE）的合成，该增塑剂来源于生物质资源桐油酸和儿茶酚，通过酯化和环氧化的方式。研究了其对聚氯乙烯(PVC)薄膜塑化、力学性能和抗迁移性的影响。结果表明，环氧基团共价键合在EEAE的支链上，EEAE的环氧基和酯基与PVC的α-氢形成氢键，对PVC的增塑效果优于市售的邻苯二甲酸二异丁酯。当 PVC 薄膜中 EEAE 的质量从 0.2 g 增加到 0.8 g 时，玻璃化转变温度 ( T _g) 从 86.7 降低到 54°C，PVC 薄膜的断裂伸长率从 124.24 ± 6.00 增加到 321.12 ± 6.13%，而拉伸强度从 40.12 ± 1.23 MPa 降低到 19.67 ± 2.33 MPa，这说明 EEAE 具有对PVC有高效的增塑作用。增塑剂对挥发和溶剂萃取的抵抗力有限。用 EEAE 增塑的 PVC 薄膜的热稳定性和相容性也得到了改善。