含N•短甲基丙烯酰胺四元共聚物的合成及 pH响应可控交联研究.

In view of the problems of chemical adsorption and chromatographic separation existing in the field application of polyacylamide and cross-linking agent, using N-hydroxymethylacrylamide(NHMAM), acrylamide (AM), acrylic acid (A A) and sodium 2-acrylamid o・ 2-methylpropanesulfonate (AMPSNa) as comonomers, and a quaternary copolymer was synthesized by aqueous solution copolymerization, and the structure of the copolymer was characterized・ The effects of pH, NHMAM content and polymer concentration on the crossrate of polymer solution were studied, and the aging-resistance and microscopic morphology of cross-linked gel were investigated ・ The results showed that the quaternary copolymer could spontaneously crosslinking in aqueous solution to form gel, and the gelling reaction was pH responsive・ If decrease the pH or increase the NHMAM content and polymer concentration the gelling time will be shorter. The viscosity retention rate of crosslinking copolymer at 90 °C for 90 d could reach 90%, reflecting an unusually good aging-resistance. [ABSTRACT FROM AUTHOR]