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首页> 外文会议>International Conference on "Times of Polymers and Composites" >Natural phenolic compounds: Anti-oxidants or pro-oxidants for biopolyesters
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Natural phenolic compounds: Anti-oxidants or pro-oxidants for biopolyesters

机译：天然酚类化合物：抗氧化剂或促氧化剂的生物聚酯

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摘要

In this work, different naturally occurring phenolic compounds, such as Thymol (Th), Vanillic acid (VA) and Ferulic Acid (FA), have been considered as UV stabilizers against the photo-oxidative degradation of polylactic acid (PLA). Particularly, in order to explore the effectiveness of the naturally occurring stabilizers, thin PLA-based films, containing different amount of the stabilizers, have been formulated and subjected to accelerate UVB exposure. The preliminary characterizations suggest that the all considered stabilizers exert a plasticizing action and the overall crystallinity of the samples is slightly reduced. If the considered stabilizers are added at low concentration, they exert a protection action, but if their content overcome a specific threshold, are able to exert a pronounced pro-degradation action. Overall, in this work, the concentration-dependent anti-/pro- oxidant activity of used naturally occurring phenolic compounds has been accurately investigated and reported.
机译：在这项工作中，不同的天然存在的酚醛化合物，例如胸腺（Th），香草酸（Va）和阿魏酸（Fa）被认为是针对聚乳酸（PLA）的光氧化降解的UV稳定剂。特别是，为了探讨天然存在的稳定剂的有效性，已经配制并进行了含有不同量的稳定剂的薄PLA薄膜，并进行加速UVB暴露。初步表征表明，所有被认为的稳定剂施加塑化作用，样品的整体结晶度略微降低。如果所考虑的稳定剂以低浓度加入，则它们发挥保护作用，但如果它们的内容克服了特定阈值，则能够发挥明显的促进劣化作用。总体而言，在这项工作中，精确研究并报道了使用天然存在的酚类化合物的浓度依赖性抗氧化剂活性。

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