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研究了由光敏剂硬脂酸铁和抗氧剂1076组成的光降解体系的光/生物双降解聚乙烯薄膜在紫外灯辐照下的分子量、脆化期、诱导期、生物降解性能等的变化规律,并用红外光谱仪表征了塑料膜的化学结构变化,用电子显微镜观察了薄膜表面的微生物生长丰度。结果表明:硬脂酸铁具有促进光降解和抑制交联的双重作用;抗氧剂1076具有较强的抑制光降解作用;硬脂酸铁和抗氧剂1076对诱导期的影响均比脆化期强;由它们组成的光降解体系经过光照后具有较强的生物降解性能。
The change of molecular weight, embrittlement period, induction period, biodegradability and so on of photo / biodegradable polyethylene film of photodegradation system consisting of photosensitizer ferric stearate and antioxidant 1076 under ultraviolet light irradiation The chemical structure of the plastic film was characterized by infrared spectroscopy. The growth of microbial growth on the surface of the film was observed by electron microscopy. The results showed that: iron stearate has the dual role of promoting photodegradation and inhibiting crosslinking; antioxidant 1076 has a strong inhibition of photodegradation; iron stearate and antioxidant 1076 have a greater impact on the induction period than the embrittlement Strong period; the photodegradation system composed of them has strong biodegradability after light irradiation.