一种四元共聚物磷酸盐粘土稳定剂的合成与性能研究

Synthesis and properties of a tetra-copolymer based on phosphate as clay stabilizer

以丙烯酰胺(AM)、丙烯酸(AA)、(1-二甲氨基)-烯丙基磷酸(DMAAPA)和N-烯丙基油酰胺(CON)为原料,制备了一种水溶性磷酸盐共聚物AM/AA/DMAAPA/CON。确定了最佳合成条件:AM:AA:DMAAPA:CON=69.6:30.0:0.2:0.2(wt%)、pH=7、引发剂加量为0.2 wt%、单体浓度20 wt%、聚合反应温度40℃。对共聚物进行了IR和NMR表征。该聚合物表现出较好的增粘性、抗剪切、耐温和耐盐性能;0.8 wt%的共聚物溶液防膨率达到80.12%,与1.0 wt%的KCl复配后,防膨率达到96.54%。

A tetra-copolymer of AM/AA/DMAAPA/CON was synthesized using acrylamide （AM）,acrylic acid（AA）,（1-dimethyl-amino）-allyl phosphoric acid（DMAAPA）and N-allyl base oil amides（CON）as raw materials.The optimum synthetic condition was determined as follows：AM∶AA∶DMAAPA∶CON=69.6∶30.0∶0.2∶0.2（wt%）,the appropriate pH was 7,initiator was found to be 0.2 wt%,concentration of monomers was 20 wt%and the temperature was 45℃.The structure of copolymer was confirmed by the results of FT-IR and NMR analysis.The copolymer showed good tackifying ,shear-resistant,temperature-tolerance and salt-resist-ant.The anti-swelling rate was found to be 80.12%for the copolymer in 0.8 wt%solution.When mixed with KCl（1.0 wt%）,the anti-swelling rate reached 96.54%.