一种新型水溶性丙烯酰胺三元聚合物磺酸盐的合成及评价

SYNTHESIS AND PERFORMANCE OF A NOVEL WATER-SOLUBLE ACRYLAMIDE SULFONIC TERPOLYMER

在过硫酸铵((NH4)2S2O8)-亚硫酸氢钠(NaHSO3)氧化还原体系下合成了丙烯酰胺(AM)/2-丙烯酰胺基-2-甲基丙基磺酸(AMPS)/N-烯丙基油酰胺(CON)三元共聚物。最佳反应条件为:单体配比m(AM)∶m(AMPS)=9∶1,CON加量0.33%,引发剂0.4%,pH值为7,温度40℃,反应8h。对AM/AMPS/CON共聚物进行了红外和特性黏数(621mL/g)表征;当NaCl质量浓度为12g/L时,AM/AMPS/CON三元共聚物的黏度保留率能达到36.67%,当MgCl2,CaCl2质量浓度为1.2 mg/L时,共聚物的黏度保留率分别为48.24%,41.75%;温度为120℃时,AM/AMPS/CON三元共聚物粘度保留率达43%。

Hydrophobically associating copolymers of acrylamide （AM）, 2-acrylamido-2-methylpro-panesulfonic acid（AMPS）and N-allyl base oil amides（CON）were synthesized by free radical polymeri- zation in the presence of （NH4）2S2O8-NaHSO3 as initiator. The optimized conditions were built, m （AM） ： rn（AMPS）=9 ：1, initiator was 0.4%, pH was 7, temperature was 40 ℃ and reaction time was 8 h. The structure of the copolymer was characterized by IR. The intrinsic viscosity number of the copolymer was about 621 mL/g. The AM/AMPS/CON eopolymer solution viscosity retention rate were about 36.67%, 48.24%, 41.75% when the concentrations of NaCl, MgCl2, CaCl2 were 12 000 mg/L, 1 200 mg/L, 1 200 mg/L, respectively. The viscosity retention rate was 43% when the tem- perature was up to 120 ℃.