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Studio comparativo dell’incorporazione di cariche minerali nell’HDPE

Studio comparativo dell’incorporazione di cariche minerali nell’HDPE

Linda Gouissem

65,68 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Química
ISBN:
9786209214646
65,68 €
IVA incluido
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Sobre IBD

Le materie plastiche sono raramente utilizzate allo stato puro e vengono spesso modificate con l’aggiunta di cariche minerali per migliorarne le proprietà o ridurne i costi. Questo lavoro studia l’effetto del carbonato di calcio (CaCO₃) e della perlite espansa sul polietilene ad alta densità (PEHD). Sono state preparate formulazioni contenenti dal 5 al 20% in volume con un plastografo Brabender (220 °C, 30 giri/min). I risultati mostrano che la viscosità aumenta ma rimane compatibile con la trasformazione. Il modulo di elasticità migliora notevolmente con il CaCO₃, mentre la perlite induce un miglioramento più moderato. L’allungamento a rottura aumenta con il 5 e il 10% di CaCO₃, ma diminuisce con la perlite, indicando una fragilizzazione. La sollecitazione a rottura diminuisce oltre il 10% per entrambi i carichi. L’analisi DSC rivela una diminuzione della temperatura di fusione, leggera con il CaCO₃ ma più marcata con la perlite. Infine, il MEB conferma una buona dispersione e, per l’HDPE/Perlite, un comportamento fragile-duttile.

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