Tributyl citrate as an effective plasticizer for biodegradable polymers: effect of plasticizer on free volume and transport and mechanical properties
Tributyl citrate as an effective plasticizer for biodegradable polymers: effect of plasticizer on free volume and transport and mechanical properties
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DOI：
10.1002/pi.5705
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发表时间：
2019-01-01
影响因子：
3.2
通讯作者：
Etxeberria, Agustin
中科院分区：
文献类型：
--
作者：
Chaos, Ana;Sangroniz, Ainara;Etxeberria, Agustin
分析了柠檬酸三丁酯(TBC)作为聚乳酸和聚羟基丁酸酯的增塑剂的有效性，以改善这些聚合物的延展性，使其适合于食品包装应用。虽然在文献中对增塑剂的热性能和力学性能进行了广泛的研究，但还没有深入分析增塑剂对自由体积和传输性能的影响。用正电子湮没寿命谱对其自由体积进行了表征，发现自由体积随TBC含量呈线性增加。测定了样品对水蒸气、氧气和二氧化碳的透过率，结果与玻璃化转变温度、样品的结晶度和自由体积的变化有关。这项工作将使人们更好地了解增塑剂对聚合物阻隔性和机械性能的影响，从而开发出具有竞争力的包装材料。(三)2018年化学工业学会
The effectiveness of tributyl citrate (TbC) as a plasticizer for polylactide and polyhydroxybutyrate was analysed in order to improve the ductility of these polymers and make them good candidates for food packaging applications. Although the thermal and mechanical properties have been widely studied in the literature, the effect of the plasticizer on free volume and transport properties has not been deeply analysed. The free volume was characterized using positron annihilation lifetime spectroscopy observing its linear increase with TbC content. The permeability to water vapour, oxygen and carbon dioxide was determined and the obtained results were related to the changes in glass transition temperature, level of crystallinity of the samples and free volume. This work would allow a better understanding of the effect of the plasticizer on the barrier and mechanical properties of polymers allowing the development of competitive materials for packaging applications. (c) 2018 Society of Chemical Industry