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Synthesis of the ESA-SSS Copolymer and Determination of Properties Scale Inhibitor

Author: QinWenHua
Tutor: MouZhanJun
School: Inner Mongolia University of Technology
Course: Applied Chemistry
Keywords: Epoxysuccinate - styrene sulfonate Copolymer Synthesis Scale inhibition performance
CLC: TQ085.4
Type: Master's thesis
Year: 2009
Downloads: 125
Quote: 2
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Abstract


Given the introduction of sulfonic acid groups in the polymer can be improved to suppress the ability of calcium phosphate, and the stabilizing effect of the zinc salt and metal ions on the basis of synthetic epoxysuccinate, try to introduce a sulfonic acid group in its molecular structure, to improve the non-nitrogen, phosphate-free and biodegradable green scale inhibitor polyepoxysuccinate by multi-scale inhibition performance. First, with maleic anhydride as the raw materials, sodium tungstate as a catalyst, hydrogen peroxide as the oxidizing agent, the cyclization reaction of the epoxy succinate. Further styrene sulfonate copolymer, ammonium persulfate, using the step synthesis solution polymerization copolymer epoxysuccinate of - on the styrene sulfonate copolymer (ESA-SSS). And the effects of raw material ratio, initiator concentration, polymerization temperature and polymerization time scale inhibition of calcium phosphate, find out the synthesis of optimum conditions are: molar ratio of 1:1, initiator concentration of 20%, polymerization temperature of 95 ° C and polymerization time 3h. Again, the use of infrared spectroscopy (IR), ultraviolet spectroscopy (UV) structural characterization of the polymer product. Polymerization product IR and UV spectra characterize the products have characteristic groups such as carboxyl group, a hydroxyl group, an ether bond, etc., and also contains sodium styrene sulfonate the structural characteristics of a sulfonic acid group, a benzene ring, etc., described in polyepoxy succinic the introduction of sulfonic acid groups in the structure of the acid molecules synthesized epoxysuccinate - copolymers of sodium styrene sulfonate. Addition, the molecular weight of the polymer was determined by UV spectroscopy of about 11500 to 13900. By gas chromatography - mass spectrometry determination of the degree of polymerization of the copolymer was 20 or 21. The polymer intrinsic viscosity was measured with a viscosity method was 0.063. Finally, the use of static method the assessment epoxysuccinate - styrene sulfonate copolymer scale inhibitor performance. The results show that: the ability epoxysuccinate - styrene sulfonate copolymer is a relatively good calcium sulfate scale inhibitor, inhibition of calcium phosphate deposition properties and the dispersion of iron oxide, suitable for the stability of the high pH aqueous zinc salt, the role of release of zinc ions, the performance of scale inhibition and dispersion more polyepoxysuccinate improved. Epoxysuccinate - styrene sulfonate copolymer general, the effect of blocking calcium carbonate scale than poly Scale epoxysuccinate performance. Epoxysuccinate - styrene sulfonate copolymer of inhibition mechanism clear threshold effect, the lattice distortion, adsorption, chelate-solubilizing and dispersing effect.

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