DST/CSIR NIC, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, 1-Meiring Naude Road, Brummeria, Pretoria 0001, South Africa.
ACS Appl Mater Interfaces. 2012 May;4(5):2395-405. doi: 10.1021/am201850m. Epub 2012 Apr 19.
Polylactide/poly[(butylene succinate)-co-adipate] (PLA/PBSA)-organoclay composites were prepared via melt compounding in a batch mixer. The weight ratio of PLA to PBSA was kept at 70:30, while the weight fraction of the organoclay was varied from 0 to 9%. Small angle X-ray scattering patterns showed slightly better dispersion in PBSA than PLA, and there was a tendency of the silicate layers to delaminate in PBSA at low clay content. Thermal analysis revealed that crystallinity was dependent on the clay content as well its localization within the composite. On the other hand, thermal stability marginally improved for composites with <2 wt % clay content in contrast to the deterioration observed in composites with clay content >2 wt %. Tensile properties showed dependence on clay content and localization. Composite with 2 wt % clay content showed slight improvement in elongation at break. Overall, the optimum property was found for a composite with 2 wt % of the organoclay. This paper therefore has demonstrated the significance of the clay content and localization on the properties of the PLA/PBSA blends.
聚乳酸/聚[(丁二酸丁二醇酯)-共-己二酸丁二醇酯]（PLA/PBSA）-有机粘土复合材料通过在间歇式混合机中熔融共混制备。PLA 与 PBSA 的重量比保持在 70:30，而有机粘土的重量分数从 0 变化到 9%。小角 X 射线散射图谱显示，PBSA 中的分散性略优于 PLA，并且在低粘土含量下，硅酸盐层有剥离的趋势。热分析表明，结晶度取决于粘土含量及其在复合材料中的定位。另一方面，与观察到的粘土含量>2wt%的复合材料的恶化相比，具有<2wt%粘土含量的复合材料的热稳定性略有提高。拉伸性能取决于粘土含量和定位。含有 2wt%粘土的复合材料在断裂伸长率方面略有提高。总的来说，在含有 2wt%有机粘土的复合材料中发现了最佳性能。因此，本文证明了粘土含量和定位对 PLA/PBSA 共混物性能的重要性。
