Thermal properties of acrylate-based composite combined with alumina-based
particles were investigated. The composites were made of poly (methyl
methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix.
Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe)
modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid
methyl esters (biodiesel - BD) were used as reinforcement. Thermal
conductivity measurements showed that composite with alumina particles with
the highest alpha phase content had the highest thermal conductivity values.
Mechanical properties (tensile strength, modulus of elasticity and
elongation at break) were improved by the addition of modified alumina
particles to PMMA/DMI matrix. The thermal properties are the most improved
for composite with 3 wt.% Al2O3-Fe-AM particles that had the lowest
temperature in a crack zone was noticed (10.28 %) compared to PMMA added due
to the better stiffness and highest thermal conductivity.