The degradation kinetics of ancient and model plasticized PVC films placed in contact with silk paper as wrapping material used for PVC heritage objects was investigated during an artificial thermal aging consisting in a temperature cycle and under controlled relative humidity. The studied PVC had close plasticizer content at the beginning of the artificial aging treatment and both contain a phthalate plasticizer. As reference, the same materials were aged in absence of any contact material. Color changes, plasticizers loss and surfaces properties were assessed every month.

The results show that the silk paper does not accelerate the PVC degradation rate. Indeed, color changes and plasticizer loss are similar whether the contact material is present or not. However for both PVC, the silk paper slows down the migration of an additive. Even if these additives are present in a very low proportion, their migration modifies significantly the material aspect as they accumulate at the PVC surface. The silk paper has thus a protective effect during the storage of PVC objects.

In addition, this study shows that the speed of aging of the ancient PVC is faster than that of the model PVC, revealing the role of the initial state of degradation.

在包含温度循环和受控相对湿度的人工热老化过程中，研究了与模型纸接触的古老和模型塑化PVC薄膜的降解动力学，丝绸被用作PVC传统物品的包装材料。所研究的PVC在人工时效处理开始时具有接近的增塑剂含量，并且都含有邻苯二甲酸酯类增塑剂。作为参考，相同的材料在没有任何接触材料的情况下进行了时效处理。每月评估一次颜色变化，增塑剂损失和表面性能。

结果表明，丝纸不会加速PVC的降解速度。实际上，无论是否存在接触材料，颜色变化和增塑剂损失都是相似的。但是，对于两种PVC，丝纸都会减慢添加剂的迁移。即使这些添加剂的含量非常低，它们的迁移也会在聚积在PVC表面时显着改变材料的外观。因此，丝纸在PVC物体的存储过程中具有保护作用。

此外，这项研究表明，古代PVC的老化速度要快于模型PVC的老化速度，这揭示了降解初始状态的作用。