Photodegradation of low‐density polyethylene with prooxidant and photocatalyst,Journal of Applied Polymer Science

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Photodegradation of low‐density polyethylene with prooxidant and photocatalyst
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-01-20 , DOI: 10.1002/app.48979
Abdolnaser Gharehdashli ₁ , Saeed Mortazavi ₁ , Hamed Rashidi ₁

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Low‐density polyethylene (LDPE) composite films with trisilver phosphate (Ag₃PO₄) and cadmium selenide (CdSe) particles as photocatalysts and manganese stearate as prooxidant were prepared. The film samples were irradiated under UV and visible light and their photodegradation were evaluated using Fourier‐transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry. The carbonyl index of the photocatalyst containing samples was very higher than the pure irradiated LDPE and even prooxidant containing film. The morphologies of the irradiated composite films were completely changed and had many cavities and cracks. The thermal stability of the composites was very lower than the pure polyethylene. However the crystallinity of the LDPE films with photocatalysts was enhanced contrarily the LDPE film with manganese stearate. Generally the results showed that the combination of the prooxidant with photocatalyst have synergistic effect on the photodegradation of the LDPE and can be used to accelerate the degradation of the polyethylene films.

中文翻译：

低密度聚乙烯与助氧化剂和光催化剂的光降解

磷酸_三银（Ag ₃ PO ₄）的低密度聚乙烯（LDPE）复合膜）制备硒化镉（CdSe）颗粒作为光催化剂，制备硬脂酸锰作为前氧化剂。在紫外和可见光下照射膜样品，并使用傅立叶变换红外光谱，扫描电子显微镜，热重分析和差示扫描量热法评估其光降解。含光催化剂的样品的羰基指数比纯辐照的LDPE甚至含助氧化剂的膜高得多。辐照后的复合膜的形貌被完全改变，并具有许多空腔和裂纹。复合材料的热稳定性远低于纯聚乙烯。然而，与硬脂酸锰的LDPE薄膜相反，具有光催化剂的LDPE薄膜的结晶度提高。

更新日期：2020-01-20

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