Guangqing Liu, Jingyi Huang, Yuming Zhou, Qingzhao Yao, Lei Ling, Peixin Zhang, Huchuan Wang, Ke Cao, Yahui Liu, Wendao Wu, Wei Sun, Zhengjun Hu
April 5, 2013
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 CaCO 3 inhibitor MA-APEL-PA. Structures of PA, APEG, APEL, and MA-APEL-PA were obtained by FT-IR and 1 H-NMR measurements. The observation shows that the dosage of MA-APEL-PA plays an important role on CaCO 3 inhibition. The effect on the formation of CaCO 3 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 CaCO 3 inhibition.