Of Resistance To The Synthesis And Testing Of The Electrolyte Thickener

Aiming to research and develop electrolyte-resistant thickener, this paper synthesized stearyl acrylate and ZXDW monomers. Then the conditions to prepare thickener have been studied particularly by orthogonal design. We have got ideal conditions to produce the thickening by single factor analyzing. And we have made performance tests as follows:First, the copolymer was prepared in inverse emulsion solution using AA and octadecyl acrylate as monomers. The acrylic acid was neutralized by sodium hydroxide before the preparation, so the acrylic acid was changed into sodium acrylic by some degree. Therefore when there was water and oil, most of it could stay in water. But the stearyl acrylate is a hydrophobe, so it is in oil when the reaction takes place. So the reaction could not go on favorably. And the product had bad performance.Second, the copolymer was prepared in benzene solution using AA and octadecyl acrylate as monomers, AIBN as initiator, and N,N-methylenebisacrylamide(MBA) as crosslinker. When it took place, we must make sure that the temperature was at 80℃and it must be like this for more than 3 hours. Then filtrated it and dried it to get white powders. Next, pour the powders into the solution which was got by blending Span-80 and gasoline and stirred it strongly. After that, dripped ammonium into it to neutralize acid. Finally, we added Tx-10 into it to change the solution from W/O to O/W. It was unexpected that it had high eletrolyte-resistance ability but low thicken ability.Third, we made ZXDW monomer first, and The electrolyte-resistant thickener was prepared by inverse emulsion polymerization using acrylic acid and ZXDW as monomers, Span-80 as emulsifier, ammonium persulfate-sodium bisulfate as initiator, and N,N—methylenebisacrylamide(NMBA) as crosslinker. Because there was a hydrophile group, it could dissolved in water easily. After the reaction was over, we distilled it at low pressure to make sure that it had little water at last. When water was as little as we supposed, we added Tx-10 into it and stirred it thoroughly. So we could get light yellow paste with good performance. And its thicken ability and PVI is as well as imported products, for exemple PTE But the electrolyte-resistance ability is from twice to four times more than that of PTF.