Garcia-Campo María Jesús, Quiles-Carrillo Luis, Masia Jaime, Reig-Pérez Miguel Jorge, Montanes Nestor, Balart Rafael
Institute of Materials Technology (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Alicante, Spain.
Institute of Design and Manufacturing (IDF), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Alicante, Spain.
Materials (Basel). 2017 Nov 22;10(11):1339. doi: 10.3390/ma10111339.
Ternary blends of poly(lactic acid) (PLA), poly(3-hydroxybutyrate) (PHB) and poly(ε-caprolactone) (PCL) with a constant weight percentage of 60%, 10% and 30% respectively were compatibilized with soybean oil derivatives epoxidized soybean oil (ESO), maleinized soybean oil (MSO) and acrylated epoxidized soybean oil (AESO). The potential compatibilization effects of the soybean oil-derivatives was characterized in terms of mechanical, thermal and thermomechanical properties. The effects on morphology were studied by field emission scanning electron microscopy (FESEM). All three soybean oil-based compatibilizers led to a noticeable increase in toughness with a remarkable improvement in elongation at break. On the other hand, both the tensile modulus and strength decreased, but in a lower extent to a typical plasticization effect. Although phase separation occurred, all three soybean oil derivatives led somewhat to compatibilization through reaction between terminal hydroxyl groups in all three biopolyesters (PLA, PHB and PCL) and the readily reactive groups in the soybean oil derivatives, that is, epoxy, maleic anhydride and acrylic/epoxy functionalities. In particular, the addition of 5 parts per hundred parts of the blend (phr) of ESO gave the maximum elongation at break while the same amount of MSO and AESO gave the maximum toughness, measured through Charpy's impact tests. In general, the herein-developed materials widen the potential of ternary PLA formulations by a cost effective blending method with PHB and PCL and compatibilization with vegetable oil-based additives.
聚乳酸（PLA）、聚3-羟基丁酸酯（PHB）和聚己内酯（PCL）的三元共混物，其重量百分比分别恒定为60%、10%和30%，并与大豆油衍生物环氧化大豆油（ESO）、马来酸化大豆油（MSO）和丙烯酸化环氧化大豆油（AESO）进行了增容处理。通过机械、热和热机械性能对大豆油衍生物的潜在增容效果进行了表征。用场发射扫描电子显微镜（FESEM）研究了对形态的影响。所有三种基于大豆油的增容剂均使韧性显著提高，断裂伸长率有显著改善。另一方面，拉伸模量和强度均有所下降，但程度低于典型的增塑效果。尽管发生了相分离，但所有三种大豆油衍生物都通过三种生物聚酯（PLA、PHB和PCL）中的端羟基与大豆油衍生物中易于反应的基团（即环氧基、马来酸酐和丙烯酸/环氧官能团）之间的反应，在一定程度上实现了增容。特别是，添加5份每百份共混物（phr）的ESO时，断裂伸长率达到最大值，而相同用量的MSO和AESO通过夏比冲击试验测得具有最大韧性。总体而言，本文开发的材料通过一种具有成本效益的共混方法，将PHB和PCL与基于植物油的添加剂进行增容，拓宽了三元PLA配方的潜力。
