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Study on Degradation Mechanism of Polyethylene Films Containing Additives with Metal lons at a Simulated Composting Temperature

机译:模拟堆肥温度下含金属离子添加剂的聚乙烯薄膜降解机理研究

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In this article, the degradation mechanism of PE films containing additives with metal ions at a simulated composting temperature has been studied. The hydroperoxide concentration [POOH] in the films was treaced quantitatively by using the iodometric potentiometric titration, compared with Fourier transform infrared spectrometry (FTIR). The results show that [POOH] increases during the early stage of degradation, followed by a more or less flat maximum before it starts to decrease. At the same time, similar results are obtained by the FTIR analysis. Besides, It is found that the rate laws for the carbonyl index and [POOH] increases seem more complicated, instead of an exponential-type increase in the early stage of the oxidation. When they are fitted by polynomial equations, the greater the rate of degradation, the more the number and content of the high-power members in the polynomial.
机译:本文研究了在模拟堆肥温度下含金属离子添加剂的PE薄膜的降解机理。与傅立叶变换红外光谱法(FTIR)相比,采用碘量电位滴定法定量处理了膜中的氢过氧化物浓度[POOH]。结果表明,[POOH]在降解的早期阶段增加,随后在开始降低之前或多或少保持不变。同时,通过FTIR分析获得了相似的结果。此外,发现羰基指数和[POOH]增加的速率规律似乎更复杂,而不是在氧化的初期呈指数型增加。当它们通过多项式方程拟合时,退化率越大,多项式中高功率成员的数量和含量就越大。

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