2. The basic classes of inhibitors

The following substances of different chemical classes can be used as inhibitors, for example:


Every compound class has its specific action on monomer stabilizations, and so its own intrinsic advantages and disadvantages. The most common among them are the representatives of four and five groups.

It should be noted that phenol inhibitors demonstrate some technological advantages, than others (Figure 1).

Figure 1. Surface appearances of heat exchangers T-58 EP-300 utility after application of phenol inhibitors (a) and nitroxyl radicals (b).
