This work focuses on the replacement of mineral oils with bio-based waste cooking oils in rubber compounding. Two different waste cooking oils from potatoes and chicken frying process were analyzed by means of chemical and rheological tests to evaluate the chemical composition, the oxidative stability and the viscosity. Waste oils have been introduced in elastomeric compounds as substitute for typical processing aids (i.e. lubricants). Cure kinetics of rubber compounds was studied by rheological characterization. Mechanical properties of vulcanized samples were determined by means of tensile tests, hardness tests and dynamic mechanical analysis. The waste oils showed a rheological behavior very similar to the mineral oils conventionally employed in rubber manufacturing leading to almost the same processability of the resulting compound. The waste oils did not significantly affect the vulcanization kinetics of the rubber compound, as expected for conventional lubricants. Waste cooking oils and mineral oil show analogous influence on mechanical properties of cured compounds. At increasing oil content, the elongation at break and the tensile strength increased whereas the values of Elastic Modulus at 100% strain, the Storage Modulus and Shore A Hardness decreased with respect to the oil-free sample. These results are very promising, confirming the possibility to replace the mineral oils, in a good practice of circular economy.

这项工作的重点是在橡胶复合中用生物基废弃食用油替代矿物油。通过化学和流变学测试分析了来自土豆和炸鸡过程的两种不同废食用油的化学成分、氧化稳定性和粘度。已在弹性体化合物中引入废油作为典型加工助剂（即润滑剂）的替代品。通过流变学表征研究了橡胶化合物的硫化动力学。硫化试样的力学性能通过拉伸试验、硬度试验和动态力学分析来确定。废油显示出与橡胶制造中常规使用的矿物油非常相似的流变行为，导致所得化合物的可加工性几乎相同。废油不会显着影响橡胶化合物的硫化动力学，正如传统润滑剂所预期的那样。废食用油和矿物油对固化化合物的机械性能显示出类似的影响。随着含油量的增加，断裂伸长率和拉伸强度增加，而在 100% 应变下的弹性模量、储能模量和肖氏 A 硬度值相对于无油样品降低。这些结果非常有希望，证实了在循环经济的良好实践中替代矿物油的可能性。相对于无油样品，断裂伸长率和拉伸强度增加，而 100% 应变下的弹性模量、储存模量和肖氏 A 硬度值降低。这些结果非常有希望，证实了在循环经济的良好实践中替代矿物油的可能性。相对于无油样品，断裂伸长率和拉伸强度增加，而 100% 应变下的弹性模量、储存模量和肖氏 A 硬度值降低。这些结果非常有希望，证实了在循环经济的良好实践中替代矿物油的可能性。