Impact of different nanoparticles on the thermal degradation kinetics of phenolic resin nanocomposites.

ASARO LUCIA; VERA A ALVAREZ; EXEQUIEL S RODRIGUEZ; LILIANA B MANFREDI

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

SPRINGER

Lugar: Berlin; Año: 2017

1388-6150

The effect of different contents of nano-fillers: carbon black (CB), bentonites (original (Bent) and modified with phosphonium salt (B-TBHP)) and commercial modified montmorillonite (C30B) on the thermal degradation of phenolic resin were studied by thermogravimetric analysis (TGA). The obtained results strongly suggest that CB was the most effective filler in improving the thermal resistance of the resol type phenolic matrix. The previous results were associated with the thermal stability of each filler but also with the compatibility between the matrix and the filler and the effect of filler incorporation on the crosslinking degree of the neat matrix. The degradation process was divided in two stages and each one was modeling. Two different kinetic degradation models (Kissinger and Flynn and Wall) were used to estimate the activation energies on each stage. The obtained curves suggested that those models exhibited poor regression coefficient and did not reproduced correctly the experimental behavior of the materials. However, a nonlinear model with three parameters adjusted the experimental values and accurately reproduced the thermogravimetric results of the resol and the nanocomposites.