Abstract
Abstract Allyloxy polyethoxy ether (APEG) and succinic anhydride were used to prepare allyloxy polyethoxy carboxylate (APEL). 8-Hydroxy-1,3,6-pyrene trisulfonic acid trisodium salt (PY) reacted with allyl chloride to produce fluorescent monomer 8-allyloxy-1,3,6-pyrene trisulfonic acid trisodium salt (PA). APEL and PA were copolymerized with maleic anhydride (MA) to synthesize the PA tagged, phosphate and nitrogen free CaCO3 inhibitor MA-APEL-PA. Structures of PA, APEG, APEL, and MA-APEL-PA were obtained by FT-IR and 1H-NMR measurements. The observation shows that the dosage of MA-APEL-PA plays an important role on CaCO3 inhibition. The effect on the formation of CaCO3 was investigated by a combination of scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) analysis. The relationship between MA-APEL-PA's fluorescent intensity and its dosage was also studied. Correlation coefficient '9 of MA-APEL-PA's fluorescent intensity and its dosage is 0.9997. MA-APEL-PA can be used to measure accurately the polymer consumption on line besides providing excellent CaCO3 inhibition.
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