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Hyperbranched polyesters with carboxylic acid functional groups for the inhibition of the calcium carbonate scale
Author(s) -
Zhang Zhijian,
Liang Tianyu,
Liu Jun,
Ding Keyi,
Chen Hualin
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46292
Subject(s) - polyester , calcium carbonate , succinic anhydride , succinic acid , monomer , scanning electron microscope , materials science , polymer chemistry , hydroxymethyl , polymer , nuclear chemistry , chemistry , organic chemistry , chemical engineering , composite material , engineering
ABSTRACT Scale deposits exist widely in industrial water‐cooling systems and oil‐production systems, causing severe damage to the equipment. The most effective way to prevent the formation of scale has been to use an inhibitor. The use of a hyperbranched polymer as an inhibitor, however, has rarely been reported. In this study, we prepared a hydroxyl‐terminated hyperbranched polyester (HBPE–OH) with trimethyloypropane as the core and 2,2‐bis(hydroxymethyl)propionic acid as an AB 2 monomer. The HBPE–OH was then modified with succinic anhydride to obtain the carboxyl‐terminated hyperbranched polyester (HBPE–COOH). The effects of the dosage, Ca 2+ concentration, pH value, and temperature of the system on the inhibition efficiency were investigated when HBPE–COOH was used as an inhibitor of calcium carbonate (CaCO 3 ) scale. HBPE–COOH acted as a good antiscaling inhibitor for CaCO 3 ; when the polyester concentration was 200 mg/L, the scale inhibition rate exceeded 70%. Scanning electron microscopy and X‐ray powder diffraction demonstrated that the mechanism of inhibition was the disturbance of the growth of the crystals and modification of the crystal morphology by the hyperbranched polyester. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46292.