The use of ethyl cinnamate, an ester of cinnamic acid present in many fruits and plants, as a bio-based plasticizer for polyvinyl chloride (PVC) plastisols has been investigated. Different temperatures (180, 190, and 200 °C) and curing times (8, 11.5, and 15 min) have been evaluated for PVC plasticized with 70 phr (parts by weight of plasticizer per one hundred weight parts of PVC resin) of ethyl cinnamate in order to optimize the curing conditions of the material, as these play a fundamental role in determining the final properties. Optimization of curing conditions has been carried out by analyzing the effect of temperature and curing time on the tensile mechanical properties, thermal stability, morphological, color changes, and migration tendency for the different plasticized materials. It has been observed that the optimal curing conditions for PVC plasticized with ethyl cinnamate are achieved at a curing temperature of 190 °C and a curing time of 11.5 min. Under these conditions, a material with high tensile strength, around 6.4 MPa, and a high elongation at break, close to 570 %, is obtained which is comparable or even superior to materials cured in the presence of other conventional plasticizers used in the PVC industry. Additionally, through field emission scanning electron microscopy (FESEM), it has been observed that for these conditions, the curing process is complete, resulting in the complete fusion of PVC microcrystals. A material with high cohesion and very low migration loss, around 2.4 %, is obtained. The effectiveness of these curing conditions has also been demonstrated using thermogravimetry. An increase in the PVC dehydrochlorination temperature has been observed due to optimum plasticizer absorption and gelation.

中文翻译：

---

肉桂酸乙酯增塑PVC塑料溶胶固化条件的优化


肉桂酸乙酯（一种存在于许多水果和植物中的肉桂酸酯）作为聚氯乙烯 (PVC) 增塑溶胶的生物基增塑剂的用途已得到研究。对使用 70 phr（每 100 重量份 PVC 树脂中增塑剂的重量份数）乙基增塑的 PVC 进行了不同温度（180、190 和 200 °C）和固化时间（8、11.5 和 15 分钟）的评估。肉桂酸酯，以优化材料的固化条件，因为这些条件在确定最终性能方面发挥着重要作用。通过分析温度和固化时间对不同塑化材料拉伸力学性能、热稳定性、形态、颜色变化和迁移趋势的影响，优化固化条件。据观察，肉桂酸乙酯增塑 PVC 的最佳固化条件是固化温度为 190 °C，固化时间为 11.5 分钟。在这些条件下，获得的材料具有约 6.4 MPa 的高拉伸强度和接近 570% 的高断裂伸长率，与 PVC 行业中使用的其他常规增塑剂存在下固化的材料相当甚至优于。此外，通过场发射扫描电子显微镜（FESEM）观察到，在这些条件下，固化过程是完整的，导致 PVC 微晶完全融合。获得的材料具有高内聚力和非常低的迁移损失（约 2.4%）。这些固化条件的有效性也已通过热重分析得到了证明。由于最佳的增塑剂吸收和胶凝作用，PVC 脱氯化氢温度有所升高。