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首页> 外文会议>9th Annual Global Plastics Environmental Conference (GPEC) Feb 26-27, 2003 Detroit MI >Poly(Lactic Acid) Films as Food Packaging Materials
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Poly(Lactic Acid) Films as Food Packaging Materials

机译：聚乳酸薄膜作为食品包装材料

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摘要

High molecular mass poly(lactic acid), PLA, is an attractive polymer family which has received increased attention in the last decade due to its natural biodegradability. PLA polymers can be totally degraded in aerobic or anaerobic environment in six months to five years. In addition to being biodegradable, PLA is a thermoplastic and compostable polymer produced from annually renewable resources, which can reduce consumption of non-renewable petrochemicals. PLA shows mechanical and barrier behavior comparable to synthetic polymers like polystyrene and polyethylene terephthalate. Properties of PLA such as melting point, mechanical strength, and crystallinity, are determined by the polymer architecture and the molecular mass. PLA can be produced as totally amorphous or up to 40% crystalline. Since new fabrication methods for large-scale fabrication of PLA have lately been developed and patented, PLA is now potentially available for use as a packaging polymer. However, there is still a need to better understand the properties of PLA as this polymer is adapted to packaging applications, especially for food packaging. The aim of this work was to study the mechanical, barrier, and thermal properties of films made from two PLA resins. The experimental values are compared to those of polystyrene and polyethylene terephthalate films.
机译：高分子聚乳酸（PLA）是一个有吸引力的聚合物家族，由于其天然的生物降解性，在过去十年中受到越来越多的关注。 PLA聚合物在有氧或厌氧环境中可在六个月至五年内完全降解。除可生物降解外，PLA是一种由每年可再生资源生产的热塑性和可堆肥聚合物，可减少不可再生石化产品的消耗。 PLA具有与聚苯乙烯和聚对苯二甲酸乙二醇酯等合成聚合物相当的机械性能和阻隔性能。 PLA的性质（如熔点，机械强度和结晶度）取决于聚合物的结构和分子量。 PLA可以完全非晶态或高达40％的结晶形式生产。由于用于PLA的大规模制造的新制造方法已经得到开发并获得了专利，因此PLA潜在地可以用作包装聚合物。但是，由于该聚合物适用于包装应用，尤其是食品包装，因此仍然需要更好地了解PLA的性能。这项工作的目的是研究由两种PLA树脂制成的薄膜的机械，阻隔和热性能。将实验值与聚苯乙烯和聚对苯二甲酸乙二酯薄膜的实验值进行比较。

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