Magnesite and dolomite micro-particles: preparation, physical properties and application in bio-based polymer composite

Auteurs

Manni A., Matadi Boumbimba R., Mikdam A., El Bouari A., Addiego F., Meziani J., Wary M.

Référence

Polymer Bulletin, vol. 79, n° 4, pp. 2149-2171, 2022

Description

The study describes the potential use of dolomite MgCa(CO3)2 and magnesite MgCO3 carbonates micro-particles to enhance the thermal properties of bio-based polyamide 11 (PA11). These two micro-particle fillers were first carefully analyzed in terms of composition (XRD, XRF, and FTIR), microstructure (SEM) and thermal behavior (TDA/TGA). The incorporation of these mineral fillers to PA11 by extrusion using a coupling agent conducted to an increase in thermal stability compared to the neat matrix based on TGA measurements. SEM investigations revealed that the micro-particles were well distributed and dispersed within PA11, and a good interfacial adhesion with the polymer matrix was also noted. Dolomite and magnesite were successfully used to increase the thermal stability of bio-based PA11. Nevertheless, magnesite was proved to have a higher interaction with the PA11 matrix compared to dolomite by increasing its crystallization temperature based on DSC measurements and further increasing thermal stability for a low filler content.

Lien

doi:10.1007/s00289-021-03609-w