Dioctyl phthalate (DEHP), as the most used commercial plasticizer, has been restricted in many polymer products due to its reproductive toxicity to human body. In this study, castor oil based polyol ester(CPE) was synthesized via a simple and efficient way and used as a sustainable plasticizer in poly(vinyl chloride) (PVC) films to replace toxic DEHP. The chemical structure of the obtained bio-based plasticizer was characterized. The oral toxicity test indicated that CPE had toxic doses of over 3000 mg/kg. Tg of PVC films decreased from 87.4 to 19.1 °C, which is lower than PVC-DEHP systems. The tensile strength and elongation at break of PVC films plasticized with 50 phr CPE is 12.10 MPa and 450.15% respectively, which shows more flexible than PVC/50 prh DEHP samples.The DMA and tensile tests results indicated that the plasctizing effect of CPE was more excellent than DEHP. DEHP can be completely replaced with CPE in flexible PVC products.

邻苯二甲酸二辛酯（DEHP）作为最常用的商业增塑剂，由于其对人体的生殖毒性而在许多聚合物产品中受到限制。在这项研究中，通过简单有效的方法合成了蓖麻油基多元醇酯（CPE），并用作聚氯乙烯（PVC）薄膜中的可持续增塑剂，以代替有毒的DEHP。对获得的生物基增塑剂的化学结构进行了表征。口服毒性试验表明，CPE的毒性剂量超过3000 mg / kg。PVC膜的Tg从87.4降低到19.1°C，低于PVC-DEHP系统。用50 phr CPE增塑的PVC薄膜的拉伸强度和断裂伸长率分别为12.10 MPa和450.15％，这表明其比PVC / 50 prh DEHP样品更具柔韧性。DMA和拉伸试验结果表明，CPE的塑化效果比DEHP更好。在柔性PVC产品中，DEHP可以完全用CPE代替。