Research of thermal stability of a solid modified resorcinol - alkylresorcinol - formaldehyde resin

The synthesis of resorcinol-alkylresorcinol-formaldehyde resins modified by styrene, where part of resorcinol is swapped with oil shale alkyresorcinols with boiling point of 270 ˚C, was held in order to enlarge the possibilities of using oil shale phenols. These resins were researched by the TGA-method. The thermal decay definition was studied in inert nitrogen environment, and resins' thermooxidizing destruction - in air atmosphere. The takeoff of the integral curves was done in the dynamic regime with linear temperature rise from 25 ˚C to 830 ˚C with a pace of 5 ˚C/min. The pace of gas stream is 50 ml/min.

The content of the volatile (105 ˚C) resin components and its ash content (830 ˚C). The half-life, responsible for the heat resistance prolonged storage, was set up in the oxidizable environment for the synthesized resins. After heating resins in the nitrogen environment with constant pace of heating until 830 ˚C, coal numbers values were received. Coal numbers characterizes the amount of non-volatile residue (coal) in resins, and allows to estimate their ability to carbonize.