Effect of Structure Characteristics of Poly(propylene glycol)- modified Copolymer on Scale Inhibition Performance

doi:10.19491/j.issn.1001-9278.2019.11.008

Abstract

Abstract: According to the structural design insight into a material, a poly(AA-co-SSS-co-PPGAZMA) copolymer was successfully synthesized by solution polymerization, and its structure were characterized by FTIR. The resultant poly(AA-co-SSS-co-PPGAZMA) copolymer was applied for the scale inhibition of industrial circulating cooling water. The effects of the molecular weight of poly(propylene glycol) (PPG), monomer ratio, dosage of scale inhibitor and pH value on the inhibition efficiency of CaCO3 scale were studied intensively. Furthermore, the effect of scale inhibitor on the crystalline structure of CaCO3 was investigated by XRD and FTIR. The results indicated that the poly(AA-co-SSS-co-PPGAZMA) copolymer exhibited a good inhibition effect on CaCO3 scale, and it achieved a inhibition rate of 95.12 % for the CaCO3 scale at the PPG molecular weight of 800, the PPGAZMA/AA/SSS mass ratio of 1/2/1 and the scale inhibitor dosage of 3.5 mg/L. Moreover, The XRD and FTIR analyses indicated that the scale inhibitor could inhibit the growth of CaCO3 crystals and reduce the crystallinity of CaCO3 scale, and therefore reached the purpose of scale inhibition.

Key words: scale inhibitor, maleic anhydride, calcium carbonate scale, crystallization behavior, industrial circulating water

CLC Number:

TQ085.412

GONG Wei, LI Meilan, SHI Ming, WEI Jia, ZHANG Guochun, LIU Bailing. Effect of Structure Characteristics of Poly(propylene glycol)- modified Copolymer on Scale Inhibition Performance[J]. China Plastics, 2019, 33(11): 39-44.

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