Biobased plasticizers for polymers is a necessity to replace conventional phthalates based plasticizers. In the present study, Citrullus lanatusseed oil (ECLO) was epoxidized in a magnetically stirred reactor. Polyvinyl chloride (PVC) films were synthesized using different concentrations of ECLO. At 40% of ECLO, films showed better surface morphology and exhibited maximum strength and elongation at break. Plasticized PVC film shown tensile strength of 18.6 MPa and elongation at break of 136.18%. No migration was observed in water, designating hydrophobic characteristics of the films. In gasoline, acid (Acetic acid) and alkali (Sodium hydroxide), plasticized samples exhibited a low resistance for migration. X-ray diffraction analysis confirmed no change in crystallinity of PVC after addition of ECLO. Thermogravimetric analysis presented the plasticized PVC films are thermally stable. Differential scanning calorimetry established the plasticizing effect of ECLO as a glass transition temperature (T_g) of plasticized films was shifted to a lower temperature.Furthermore, Fourier transform infrared spectroscopy revealed interaction of ECLO with PVC as peaks of C–Cl bond (833 cm⁻¹) and CO stretch (1739 cm⁻¹) were detected. Thus, the present study delivered a better substitute for phthalates as it endorses the application of ECLO in the PVC blend as a plasticizer.

用于聚合物的生物基增塑剂是替代传统邻苯二甲酸酯类增塑剂的必需品。在本研究中，Citrullus lanatus种子油 (ECLO) 在磁力搅拌反应器中进行环氧化。使用不同浓度的 ECLO 合成聚氯乙烯 (PVC) 薄膜。在 40% 的 ECLO 下，薄膜表现出更好的表面形态，并表现出最大的强度和断裂伸长率。增塑 PVC 薄膜的拉伸强度为 18.6 MPa，断裂伸长率为 136.18%。在水中未观察到迁移，表明薄膜具有疏水特性。在汽油、酸（乙酸）和碱（氢氧化钠）中，增塑的样品表现出较低的迁移阻力。X 射线衍射分析证实加入 ECLO 后 PVC 的结晶度没有变化。热重分析表明增塑 PVC 薄膜是热稳定的。_g ) 的增塑膜转移到较低的温度。此外，傅里叶变换红外光谱揭示了 ECLO 与 PVC 的相互作用，因为检测到 C-Cl 键 (833 cm ^-1 ) 和CO拉伸峰(1739 cm ^-1 )。因此，本研究提供了一种更好的邻苯二甲酸酯替代品，因为它支持 ECLO 在 PVC 共混物中作为增塑剂的应用。