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Effects of Ozone Exposure on the Structural, Mechanical and Barrier Properties of Select Plastic Packaging Films

机译:臭氧暴露对某些塑料包装薄膜的结构,机械和阻挡性能的影响

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摘要

The effects of ozone (O_3) gas exposure at various concentrations and treatment times on structural, mechanical and barrier properties of polyethylene and poly amide films were investigated. Changes in the structure of the films were monitored using an FT-IR spectrometer. The results showed that O_3 treatment affected polyethylene and poly amide films differently. While O_3 treatment caused formation of oxygen-containing functional groups and degradation of polymeric chains in polyethylene films, O_3 treatment of polyamide films significantly increased the -C-N- stretch observed at 1125 cm~(-1) in the FT-IR spectra. The changes in the mechanical properties of polyethylene films depended on the O_3 treatment conditions (temperature and O_3 concentration were the most significant), but an increase in tensile strength of poly amide films was observed regardless of the treatment conditions. Permeability to O_2 for both types of films decreased with increasing O_3 treatment time.
机译:研究了不同浓度和处理时间的臭氧(O_3)气体暴露对聚乙烯和聚酰胺薄膜的结构,机械和阻隔性能的影响。使用FT-IR光谱仪监测膜结构的变化。结果表明,O_3处理对聚乙烯和聚酰胺薄膜的影响不同。 O_3处理引起聚乙烯膜中含氧官能团的形成和聚合物链的降解,而聚酰胺膜的O_3处理则显着增加了FT-IR光谱中1125 cm〜(-1)处的-C-N-拉伸。聚乙烯膜的机械性能变化取决于O_3处理条件(温度和O_3浓度最显着),但无论处理条件如何,均观察到聚酰胺膜的拉伸强度增加。两种类型的膜对O_2的渗透性均随着O_3处理时间的增加而降低。

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