环氧化和马来酸化玉米油对聚乳酸（PLA）和聚羟基丁酸酯（PHB）共混物性能的影响。

Effect of Epoxidized and Maleinized Corn Oil on Properties of Polylactic Acid (PLA) and Polyhydroxybutyrate (PHB) Blend.

作者信息

Sempere-Torregrosa Jaume, Ferri Jose Miguel, de la Rosa-Ramírez Harrison, Pavon Cristina, Samper Maria Dolores

机构信息

Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Alicante, Spain.

出版信息

Polymers (Basel). 2022 Oct 7;14(19):4205. doi: 10.3390/polym14194205.

The present work analyzes the influence of modified, epoxidized and maleinized corn oil as a plasticizing and/or compatibilizing agent in the PLA-PHB blend (75% PLA and 25% PHB wt.%). The chemical modification processes of corn oil were successfully carried out and different quantities were used, between 0 and 10% wt.%. The different blends obtained were characterized by thermal, mechanical, morphological, and disintegration tests under composting conditions. It was observed that to achieve the same plasticizing effect, less maleinized corn oil (MCO) is needed than epoxidized corn oil (ECO). Both oils improve the ductile properties of the PLA-PHB blend, such as elongation at break and impact absorb energy, however, the strength properties decrease. The ones that show the highest ductility values are those that contain 10% ECO and 5% MCO, improving the elongation of the break of the PLA-PHB blend by more than 400% and by more than 800% for the sample PLA.

本研究分析了改性、环氧化和马来酸化玉米油作为增塑剂和/或增容剂在聚乳酸-聚羟基丁酸酯共混物（75%聚乳酸和25%聚羟基丁酸酯，重量比）中的影响。玉米油的化学改性过程已成功完成，并使用了0至10%（重量）的不同用量。对所得到的不同共混物进行了热性能、力学性能、形态学以及堆肥条件下的崩解测试。结果表明，要达到相同的增塑效果，所需的马来酸化玉米油（MCO）比环氧化玉米油（ECO）少。两种油都改善了聚乳酸-聚羟基丁酸酯共混物的韧性，如断裂伸长率和冲击吸收能量，但强度性能下降。显示出最高韧性值的是含有10%ECO和5%MCO的共混物，聚乳酸-聚羟基丁酸酯共混物的断裂伸长率提高了400%以上，聚乳酸样品的断裂伸长率提高了800%以上。