Abstract

Modified (or unmodified) Tunisian clay nanoparticles were incorporated as nanofillers in post-consumer polypropylene (PCPP) polymer matrix in order to improve its inherent properties. PCPP loaded with Na-clay or organoclay nanocomposites were elaborated by melt intercalation method. Morphological, thermal and rheological properties of prepared nanocomposites were then evaluated. SEM observations showed better nanoparticles dispersion when PCPP was filled with organoclay compared to Na-clay. According to FTIR analysis, the increase of PCPP band intensity is much higher when using organoclay, suggesting that the nanocomposites might have more intercalation of organoclay aggregates than in the case of filled with Na-clay. Thermal gravimetric and thermal degradation analyses results confirmed that the addition of modified clay allows better thermal stability than PCPP filled with unmodified clay. This result was confirmed by DSC analysis. We deduced from the rheological analysis that PCPP storage modulus G′ and loss modulus G″ increased with the addition of clay nanoparticles. This increase was higher when the organo-modified clay was dispersed into the PCPP matrix, demonstrating the reinforcing effect of the latter on PCPP polymer.

Graphical Abstract

Storage modulus of pure PCPP and PCPP/clay nanocomposites.

中文翻译：

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通过（未）改性的突尼斯粘土纳米颗粒掺入来平衡消费后PP

摘要

将改性的（或未改性的）突尼斯粘土纳米颗粒作为纳米填料掺入消费后的聚丙烯（PCPP）聚合物基质中，以改善其固有性能。通过熔体插层法对负载有Na-粘土或有机粘土纳米复合材料的PCPP进行了细化。然后评估了制备的纳米复合材料的形貌，热学和流变性。SEM观察显示，与Na-粘土相比，当PCPP填充有有机粘土时，纳米颗粒的分散性更好。根据FTIR分析，当使用有机粘土时，PCPP能带强度的增加要高得多，这表明纳米复合材料可能比在填充有Na粘土的情况下具有更多的有机粘土聚集体插层。热重和热降解分析结果证实，改性粘土的添加比填充未改性粘土的PCPP具有更好的热稳定性。DSC分析证实了该结果。从流变学分析推论，随着粘土纳米颗粒的加入，PCPP储能模量G'和损耗模量G''增大。当有机改性的粘土分散到PCPP基质中时，这种增加更高，这表明后者对PCPP聚合物的增强作用。

图形概要

纯PCPP和PCPP /粘土纳米复合材料的储能模量。