In practical applications, a polymer is usually used together with others, where the aging behavior will become more complex than the polymer used individually. The interactions between adjacent polymers during aging are the cross-infection effects. In this study, the cross-infection between unstabilized polypropylene (PP) and seven typical polymers during thermo-oxidation was investigated by using chemiluminescence (CL) and Fourier transform infrared spectroscopy (FTIR). The changes of peak times by CL and functional groups by FTIR were chosen as the indicators. Thermo-oxidation of most of the seven polymers was accelerated by unstabilized PP, and different polymers had different susceptibility. In return, the acceleration of the typical polymers on unstabilized PP could also be observed. Cross-infection was thus demonstrated a common phenomenon in thermo-oxidation of various kinds of polymers. Inappropriate polymer combinations used together might cause mutual accelerated deterioration. These results were of great significance to industrial applications.

在实际应用中，通常将聚合物与其他聚合物一起使用，其老化行为将比单独使用的聚合物更为复杂。老化过程中相邻聚合物之间的相互作用是交叉感染效应。在这项研究中，通过化学发光（CL）和傅立叶变换红外光谱（FTIR）研究了热氧化过程中不稳定聚丙烯（PP）与七个典型聚合物之间的交叉感染。选择CL的峰时间变化和FTIR的官能团变化作为指标。不稳定的PP促进了这7种聚合物中大多数的热氧化作用，并且不同的聚合物具有不同的磁化率。作为回报，还可以观察到典型聚合物在不稳定的PP上的加速作用。因此证明了交叉感染是各种聚合物热氧化中的普遍现象。聚合物组合使用不当可能会导致相互加速变质。这些结果对工业应用具有重要意义。