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首页> 外文期刊>Journal of Applied Polymer Science >Ultraviolet protection of recycled polyethylene terephthalate
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Ultraviolet protection of recycled polyethylene terephthalate

机译：再生聚对苯二甲酸乙二醇酯的紫外线保护

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Polyethylene terephthalate (PET) is commonly used for food packaging due to its high clarity, high resistance to water vapor, oxygen and carbon dioxide permeation, and good mechanical properties. However, its high transmittance in the ultraviolet-A (UVA) region leaves food susceptible to UV-induced degradation reactions. Incorporating post-consumer recycled (PCR) PET into virgin PET increased UVA absorption 100% when utilizing 100% PCR-PET, thus, increasing the protection potential of food packaging by reducing UVA-induced degradation reactions. Comparison of the current data with previous work demonstrated the reproducibility of UVA protection independent of the PC flake source. The thickness-normalized absorbance at 350 nm was a reliable predictor of the UVA protection potential regardless of composition and manufacture date. Raman, fluorescence, and attenuated total reflectance-Fourier transform infrared spectroscopy analyses provided support that the UVA absorbing moiety was a quinone derivative formed during degradation reactions that are known to occur during melt processing/re-processing. (C) 2017 Wiley Periodicals, Inc.
机译：聚对苯二甲酸乙二醇酯（PET）通常用于食品包装由于其高透明度，高抗水蒸气，氧气和二氧化碳渗透性，以及良好的机械性能。然而，其在紫外-A（UVA）区域中的高透射率使得食物易受紫外诱导的降解反应的影响。将消费后再生（PCR）PET掺入原始PET增加100％在利用100％PCR-PET时增加UVA吸收，从而增加了通过减少UVA诱导的降解反应来增加食品包装的保护潜力。与以前的工作的当前数据的比较显示了UVA保护独立于PC剥落源的再现性。无论组成和制造日期如何，350nm的厚度归一化吸光度是UVA保护势的可靠预测因子。拉曼，荧光和衰减总反射率 - 傅里叶变换红外光谱分析提供了支持的支持，即UVA吸收部分是在熔融加工/重新加工期间已知发生的降解反应期间形成的醌衍生物。 （c）2017 Wiley期刊，Inc。

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