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Environmental Oxidative Degradation and Biodegradation of Eco-Benign Plastics

机译:生态型塑料的环境氧化降解和生物降解

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Polyethylene (PE) has found widespread use as a packaging material. Plastics waste disposal, as one of the serious environmental issues, has caused much criticism. The environmental oxidative- and bio- dual degradable linear low-density polyethylene (LLDPE) samples containing Eco-Benign Plastics (EBP) pro-oxidant additives were submitted to an investigation aimed at evaluating their preliminary oxidative degradation in natural environment or accelerated oven aging and their ultimate biodegradation in solid incubation substrate or soil composting conditions. Original and test samples submitted to abiotic oxidation including photo degradation and thermal degradation were characterized by means of FT-IR and GPC. Biodegradation test simulating soil burial and composting conditions reveals that the biodegradation degree exceeded 30%. The degradation process is accompanied by a dramatic change in the structural characteristics of the test samples. It is clear that LLDPE-EBP formulations are effective in promoting the oxidation and subsequent biodegradation of polyethylene in natural and soil environment.
机译:聚乙烯(PE)已被广泛用作包装材料。作为严重的环境问题之一,塑料废物处理引起了很多批评。含有生态环保塑料(EBP)助氧化剂的环境氧化和生物双降解线性低密度聚乙烯(LLDPE)样品已提交研究,旨在评估其在自然环境中的初步氧化降解或加速烤箱老化以及它们在固体培养基质或土壤堆肥条件下的最终生物降解。通过FT-IR和GPC对进行非生物氧化(包括光降解和热降解)的原始样品和测试样品进行了表征。模拟土壤埋藏和堆肥条件的生物降解试验表明,其生物降解度超过30%。降解过程伴随着测试样品结构特征的巨大变化。显然,LLDPE-EBP配方可有效促进聚乙烯在自然和土壤环境中的氧化和随后的生物降解。

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