Phenol–Formaldehyde Based Composites Containing Coal as a Filler
摘要
The presented article presents the results of studies conducted to study the changes in the properties of the final product by adding Printex® XE 2B coal powder as a filler to the phenol–formaldehyde resin modified with aromatic hydrocarbons contained in the light gas oil fraction obtained in the catalytic cracking process of oil during the polycondensation process (N1) or at the end of the process (N2). It was determined that if the electrical conductivity of MPFR without coal was 1.4 × 10−7 S/m, the electrical conductivity of the composite samples obtained by adding coal to it was higher, and was 1.0 × 10−3 S/m (N1) and 1.5 × 10−5 S/m (N2), respectively. Despite the same amount of filler being added to the composite samples (N1 and N2) by different approaches, relatively higher conductivity was observed with the addition of coal during synthesis (N1), which in turn was associated with the effective dispersion of coal particles with the resin and the formation of a resistant network. Consequently, the addition of coal to MPFR during synthesis was evaluated as a more effective approach in terms of increasing the electrical conductivity.