| In this dissertation, in a certain temperature, using elhanol as initator and sodium hydroxid as catalyst, with maleic anhydride and propylene oxide by ring-opening polymerization synthesized hydroxyl-terminated solvatable chain. Solvatable chain structure prepared by changed the molar ratios of raw materials and different anchoring groups synthesized polyester hyperdispersants, the dispersing properties in organic solvent have been studied.By single factor experiments, discuss the main influenced factor to the reaction of solvatable chain, include the molar ratios of raw materials(ethanol:maleic anhydride)〠the reaction temperature and the reaction times. Assess the utilization rate of epoxy propane and comparise the quality of the final product, the good synthesis conditions:the molar ratios of raw materials is1:7〠the temperature is100℃, the time ascertained by dropwise adding propylene oxide to make the acid value is0. The time is6h, the utilization rate of epoxy propane is78.55%and the products color present pale yellow. Among the reaction process synthesized the same polyester solvatable chain of two different hyperdispersants:control the acid value in25to35mgKOH/g finding a kind of carboxyl groups for anchoring and with ethyleneamine for a acylamino as anchoring group.Carbamate-terminated hyperdispersant obtained by the toluene diisocynate (TDI) and hydroxyl solvatable chain further reaction as the anchoring group. Analysis the reaction conditions one by one, in acetone system, reaction solubility〠economy〠further treatment and comprehensive performance is better, results in a more good reaction temperature for60℃, catalyst to choose dibutyltin dilaurate amount to0.1%. The way of feeding is appropriate to use polymer solution adding isocyanate and terminated reaction agreed well with ethyleneamine under the temperature of80℃, the time in3h. To ensure the smooth progress of the reaction, avoid gel phenomenon to appear and the product dispersing capability is better.The product was qualitative identified by the way of infared (IR) spectrum and gel chromatography(GPC). The carbamate-terminated, carboxyl-terminated and amide-terminated polyester hyperdispersants of dispersing application technology in carbon black solution have been researched. The stability of the system through measure the absorbance, along with the increase of the content of the dispersant, scattered stability on first increases, then decreases. Comparing to the same dispersant, the carbamate-terminated dispersant have good stability. The influences of the viscosity, particle size on the diversification effect were studied, the more appropriate concentration as follow:the carbamate-terminated is0.4%, carboxyl-terminated is0.8%and amide-terminated is0.4%. The carbamate-terminated polyester hyperdispersant that comprehensive performance is good by the lateral comparison.The topic research is about synthesis of hyperdispersant and application of carbon black solution. Compared to the common dispersant caprolactone for solvent relaxation of the chain polyester the dispersant, through the open loop polymerization get polyester super dispersant in the reaction conditions, the expansion of the structure and the molecular weight were easier to control, so as to use certain structure dispersant to comparing the different structure of the dispersant in application of dispersant scattered system the effects of the new type more effective for the design and synthesis of dispersant and offer reference to the research significance.The topic research is about synthesis of hyperdispersant and application of carbon black solution. Compared to the common dispersant which solvatable chain is caprolactone. The reaction conditions, the expansion of the structure and the molecular weight are easier to control. Thus it can use certain structure dispersant to compare the different structures in application of scattered systems. Offer reference for designing and synthesizing the new more effective hyperdispersant. |
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