Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.20230059
Polímeros: Ciência e Tecnologia
Original Article

Effect of process parameters on the properties of LDPE/sepiolite composites

Priscila da Silva e Souza; Ana Maria Furtado de Sousa; Ana Lúcia Nazareth da Silva

http://dx.doi.org/10.1590/0104-1428.20230059 Polímeros: Ciência e Tecnologia, vol.34, n2, e20240015, 2024
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Abstract

This study examines the effect of processing parameters and reactive extrusion on the mechanical, thermal, morphological, and rheological properties of low-density polyethylene (LDPE) and sepiolite composites (LDPE/sepiolite: 95/5 wt/wt) produced by in situ reactive extrusion in a twin-screw extruder. Using a design of experiments, the contribution of the factors reverse mixing elements (RE), maleic anhydride (MA), and dicumyl peroxide (DCP) was determined. The results showed that a better interaction between LDPE and sepiolite phases occurred when reactive extrusion was carried out, leading to a satisfactory balance between mechanical properties and thermal stability behavior. The rheology analysis revealed that a more pronounced solid-like behavior was achieved in the composite prepared by reactive extrusion and in the presence of the filler. The SEM micrographs showed the appearance of a network-like morphology in the composite processed in the presence of additives and sepiolite filler.

 

Keywords

low density polyethylene, sepiolite, cross-linking, reactive extrusion, composites

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