Acrylic acid-maleic anhydride copolymer application

[Application] Acrylic acid maleic anhydride copolymer has a strong dispersing effect on carbonates, etc.
, and has high thermal stability.
It can be used under harsh conditions such as high temperature of 300°C
.

(1) Anti-scaling mechanism

The scale inhibition mechanism of acrylic acid-maleic anhydride copolymer mainly has four aspects: ①The crystal distortion effect.
Scholars at home and abroad have proved that the CaSO ₄ ·2H ₂ O crystals with acrylic acid-maleic anhydride copolymer have been deformed through X-ray diffraction patterns.
, Its diffraction peak and its area change significantly with the increase of the added amount of scale inhibitor; ②Adsorption, acrylic acid maleic anhydride copolymer can also adsorb CaSO ₄ ·2H ₂ O and other scale-causing crystals or microcrystals to inhibit crystals The growth rate of the particles and adsorption will also cause the crystal particles to have the same electric charge and repel each other, so that the crystal particles are suspended in the solution to achieve the purpose of scale inhibition; ③Dispersion and solubilization, the data listed in Table 5-9 are: MA-AA copolymer has solubilizing and dispersing effects on CaSO ₄ ·2H ₂ O and CaCO ₃ ; ④Chelation (Table 5-10)
.

Table 5-9 The solubilization and dispersion effect of MA-AA copolymer on CaSO4·2H2O and CaCO3

Table 5-10 Chelation of MA-AA copolymer to CaCO3

(2) Anti-scaling performance

Acrylic acid-maleic anhydride copolymer can be used in harsh environments and has good storage stability.