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首页> 外文期刊>Journal of Applied Polymer Science >Processing and Characterization of Poly(lactic acid) Films Plasticized with Commercial Adipates
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Processing and Characterization of Poly(lactic acid) Films Plasticized with Commercial Adipates

机译：市售己二酸酯增塑聚乳酸薄膜的加工与表征

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摘要

The high brittleness of Poly(lactic acid) is a major drawback for flexible food packaging applications. The aim of this work is to evaluate the potential use of commercial adipates as PLA plasticizers to obtain transparent films with enhanced mechanical properties. Processing conditions were optimized. The effect of plasticizers was characterized by a decrease on the glass transition temperature and an increase in PLA chains mobility, which induced crystallization on heating. Thermal stability was not significantly affected, and mechanical properties showed an increase in ductility with the plasticizer content. Oxygen transmission rate was also measured to evaluate the effect of the microstructures generated by the presence of these additives in PLA-based films. The monomeric adipate presented lack of homogeneity that makes films plasticized with this additive not useful for the intended application. Good compatibility was observed between polyadipates (up to 20 wt %) and the matrix, making them promising materials for biodegradable films manufacturing. V
机译：聚乳酸的高脆性是柔性食品包装应用的主要缺点。这项工作的目的是评估商用己二酸酯作为PLA增塑剂在获得具有增强机械性能的透明薄膜方面的潜在用途。优化了加工条件。增塑剂的作用的特征在于玻璃化转变温度的降低和PLA链迁移率的提高，这会导致加热时结晶。热稳定性没有受到显着影响，并且机械性能显示出随着增塑剂含量的增加延展性。还测量了氧气透过率，以评估由这些添加剂在PLA基薄膜中的存在所产生的微结构的影响。己二酸酯单体表现出缺乏均质性，这使得用这种添加剂增塑的薄膜无法用于预期的应用。在聚己二酸酯（至多20 wt％）与基质之间观察到良好的相容性，使其成为用于生物可降解膜制造的有前途的材料。 V

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