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Synthesis and properties of castor oil based plasticizers

机译：蓖麻油基增塑剂的合成与性能

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A series of environment-friendly plasticizers has been synthesized from castor oil through a mild esterification/epoxidation reaction. The modified epoxy acetylated castor oil (EACO) can plastify poly(vinyl chloride) (PVC) efficiently, even better than the commercial plasticizers dioctyl terephthalate (DOTP) and epoxidized soybean oil (ESO), in terms of in tensile strength, migration stability, solvent extraction stability and thermal stability. Specifically, the tensile strength and elongation at break of a PVC sample plastified by epoxy acetylated castor oil (EACO) were 18.5 and 10.0% higher than that of DOTP, and 13.9 and 23.8% higher than that of ESO, respectively. Volatility, migration, solvent extraction and thermal stability tests indicated that the presence of carbon–carbon double bonds and hydroxy groups reduce the compatibility of a plasticizer with PVC while the presence of epoxy groups and ester bonds can improve the plasticizing effect of the plasticizer on PVC. In addition, alkyl groups can improve the plasticizing effect on PVC while benzene rings increase the rigidity of the PVC. The design strategy based on castor oil highlights a sustainable avenue for preparing cost-effective and high-efficiency plasticizers.
机译：蓖麻油通过温和的酯化/环氧化反应合成了一系列环保增塑剂。改性的环氧乙酰化蓖麻油（EACO）可以有效地增塑聚氯乙烯（PVC），就抗张强度，迁移稳定性，抗张强度，稳定性，稳定性，稳定性，稳定性和稳定性而言，都比市售增塑剂对苯二甲酸二辛酯（DOTP）和环氧化大豆油（ESO）更好。溶剂萃取稳定性和热稳定性。具体而言，用环氧乙酰化蓖麻油（EACO）增塑的PVC样品的拉伸强度和断裂伸长率分别比DOTP高18.5和10.0％，比ESO高13.9和23.8％。挥发性，迁移，溶剂萃取和热稳定性测试表明，碳-碳双键和羟基的存在降低了增塑剂与PVC的相容性，而环氧基和酯键的存在可以改善增塑剂对PVC的增塑效果。此外，烷基可以改善对PVC的增塑效果，而苯环则可以提高PVC的刚性。基于蓖麻油的设计策略强调了制备成本有效和高效增塑剂的可持续途径。

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