INFLUENCE OF THE USE OF COMPATIBILIZER ON THE PHYSICAL AND THERMAL PROPERTIES OF PP/MUSCOVITE COMPOSITES
DOI:
https://doi.org/10.66104/141x4242Keywords:
PP; muscovite; compatibilizer; compositeAbstract
Polymer/mineral composite materials have been the subject of constant studies demonstrating the feasibility of obtaining lighter and more flexible products while maintaining high thermal and mechanical resistance, among other properties. In addition to improved properties, many of the tested minerals are found in large quantities in Brazil, often as tailings from mining processes. In this context, the present work aimed to study the influence of the PE-g-MA compatibilizer on the development of a polypropylene (PP) and muscovite (mica) composite. The mineral with a particle size smaller than 45 µm was used in a fixed proportion of 15% (%w/w) and compatibilizer contents of 1% and 5%. The mixtures were processed in a single-screw extruder, with temperatures of 145°C, 175°C, and 185°C in the three heating zones and a rotation speed of 40 rpm. The extruded material was shaped into flat films. Through optical microscopy analysis, it was possible to verify the presence of mica following a certain alignment within the material. Hardness analysis revealed a tendency for this property to decrease with increasing compatibilizer content, suggesting increased plasticity of the material. Thermal analyses (TG/DSC) showed a slight increase in the polymer decomposition temperature and a reduction in the degree of crystallinity, possibly due to the restriction of movement imposed by the presence of mica and the compatibilizer itself.
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