In the process of system operation, various ion exchanges will often change the original performance of tetrabromobisphenol A. There are two reasons: the essence has changed and the chemical structure has been destroyed. Contaminated by foreign impurities.
At present, many fireproof materials in China are mainly used: expanded polystyrene board (eps), extruded polystyrene board (xps), polyurethane (pu), powdered polystyrene particles, inorganic thermal insulation mortar, bromine fire retardant and other series.
During the operation of the system, the structure is seriously damaged due to oxidation or degradation reaction, which is an irreversible deterioration, also known as deterioration.
In the application of tetrabromobisphenol A, the main reason for deterioration is that the material has oxidant. When the temperature is too high, the corrosion is more serious. If there are heavy metal ions, they will accelerate the deterioration due to catalysis. After oxidation, the color becomes lighter, the volume becomes larger, the friability and the volume exchange capacity decrease, but the mass exchange capacity changes little.
Strong alkalinity is used after being placed in a positive state. It is oxidized by liquid dissolved oxygen. During regeneration, the oxidant contained in the alkali is oxidized, and the strong alkaline quaternary ammonium group is degraded gradually, but the skeleton chain will not be broken. In chemical desalting, the degradation of strong alkalinity shows that the decomposition capacity of neutral salts, especially the exchange capacity, decreases.
With the development of society and the prosperity of economy, more and more high-rise buildings have been found in numerous large cities, and many problems have followed. The key factor in the fire resistance and fire prevention of high-rise buildings is the selection of tetrabromobisphenol A, and materials play a vital role in fire prevention.
China's investment in research on thermal insulation materials, thermal insulation systems, building energy conservation and fire protection performance is still far from enough, and research efforts are insufficient. There are few original things, and few people deeply analyze problems.
Edit: R