When a polymer is used together with others, its aging process will be affected by the adjacent polymers. This infectious behavior between polymers makes the aging process more complex than that of an individual material. In this study, infectious behavior in photo-oxidation of polymers was investigated. Polypropylenes (PPs), an unstabilized PP and a commercial PP, were chosen as the infection sources. Six typical polymers, high density polyethylene (HDPE), low density polyethylene (LDPE), polystyrene (PS), polycarbonate (PC), poly(ethylene terephthalate) (PET), and polyamide 6 (PA6), were used as the targets. The degree of oxidation of the targets was evaluated by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR). An accelerating effect of two infection sources on the photo-oxidation of the target polymers was observed. Potential infectious agents from the infection sources were detected by pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) and gas chromatography (GC). The acceleration effect of two main infectious agents, i.e. acetone and acetic acid, on the photo-oxidation of the commercial PP was verified. The infectious effect of the infection source on the target polymer was considered to be a comprehensive result of the effects of a variety of infectious agents.

中文翻译：

---

聚合物光氧化中的传染行为

当聚合物与其他聚合物一起使用时，其老化过程将受到相邻聚合物的影响。聚合物之间的这种传染性行为使老化过程比单个材料更复杂。在这项研究中，研究了聚合物光氧化过程中的感染行为。聚丙烯（PPs），不稳定的PP和商用PP被选为感染源。使用六种典型的聚合物，即高密度聚乙烯（HDPE），低密度聚乙烯（LDPE），聚苯乙烯（PS），聚碳酸酯（PC），聚对苯二甲酸乙二醇酯（PET）和聚酰胺6（PA6）作为目标。通过衰减全反射-傅立叶变换红外光谱（ATR-FTIR）评估靶标的氧化程度。观察到两种感染源对目标聚合物的光氧化作用的加速作用。通过热解-气相色谱-质谱（Py-GC-MS）和气相色谱（GC）检测来自感染源的潜在传染源。两种主要传染因子的加速作用，即丙酮和乙酸，对商业PP的光氧化进行了验证。感染源对目标聚合物的感染作用被认为是多种感染剂作用的综合结果。