羧甲基淀粉钠接枝共聚物及其凝胶体系的性能研究

Study on sodium carboxymethyl starch grafted copolymers and its gel system performance

以羧甲基淀粉钠(CMSNa)为接枝骨架,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为接枝单体,以过硫酸铵(APS)为引发剂,采用水溶液聚合方法合成接枝共聚物CMSNa-g-(AM-co-AMPS)。深入探讨合成条件对接枝物溶液表观黏度的影响。同时与PAM(W=1000万)比较而言,接枝共聚物表现出良好的耐温、抗盐性能。针对接枝共聚物交联凝胶的抗剪切性能进行研究,结果表明:接枝物交联凝胶在170s-1的剪切速率下,持续剪切30min,黏度仍可保持在300mPa·s以上。淀粉衍生物的引入,既可提升聚合物的应用性能,又降低成本,极大地拓展了淀粉在石油化工领域的应用。

Free radical polymerization was adopt to graft acrylamide（AM）and 2-acrylamide-2-methyl propane sulfo- nie acid（AMPS）onto sodium carboxymethyl stareh（CMSNa）in aqueous solution. The effect of synthetic conditions on the apparent viscosity of polymer aqueous solution were investigated, and the results showed good temperature tolerance and sal^resistance compared with PAM（W= 10,000,000）. Shearing properties of crosslinked gel was investigated by shearing the hydrogel inl70-s for 30min, the result showed that the viscosity was still more than 300mPa . s. And the introduction of starch saved the cost and expanded the application of starch in the oil field.