高稳定性双水相共聚物PAM-AMPS的合成与表征  

Synthesis and Characterization of PAM-AMPS with High Stability Prepared by Aqueous Two-Phase Polymerization Method

作　　者：呼早霞 沈一丁[1] 赖小娟[1,2] 马国艳 王丹[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]陕西农产品加工技术研究院,陕西西安710021

出　　处：《精细化工》2018年第3期511-516,共6页Fine Chemicals

基　　金：国家自然科学基金(20876093);陕西省科技厅工业科技攻关计划项目(2016GY-193)~~

摘　　要：采用双水相聚合技术,以硫酸铵水溶液为反应介质,过硫酸铵和亚硫酸氢钠氧化还原体系为引发剂,丙烯酰胺（AM）和2-丙烯酰胺基-2-甲基丙磺酸（AMPS）为反应单体,聚2-丙烯酰胺基-2-甲基丙磺酸（PAMPS）为稳定剂,制备了稳定的阴离子聚丙烯酰胺（PAM-AMPS）双水相分散液。采用FTIR、XRD、TG及DTA对产物进行了表征,并对其分散液进行了TEM与稳定性分析。结果表明：共聚物PAM-AMPS为无定形态的非晶聚合物,且热稳定性好;PAM-AMPS双水相分散液稳定性能优良,动力学不稳定指数（TSI）≤0.4,分散相为球形或椭球形液滴,平均粒径为186.2 nm。流变测试显示：ρ（NaCl）=2×10^4mg/L时,PAM-AMPS双水相分散液质量分数（以体系总质量计,下同）从0.2%增至1%,该混合体系黏度从8.22 Pa·s增到60.74 Pa·s;NaCl质量浓度从1×10^4mg/L增至5×10^4mg/L时,含质量分数0.2%的PAM-AMPS双水相分散液的混合体系黏度从10.80 Pa·s降至5.94 Pa·s。因而PAM-AMPS双水相分散液表现出优良的稠化及耐盐性能。A stable anionic polyacrylamide（ PAM-AMPS） aqueous dispersion was prepared by aqueous two-phase polymerization of acrylamide（ AM） and 2-acrylamido-2-methylpropanesulfonic acid（ AMPS）by using poly（ 2-acrylamido-2-methylpropanesulfonic acid）（ PAMPS） as steric stabilizer,ammonium persulfate and sodium bisulfite redox system as initiator. The sample was confirmed by means of FTIR,XRD,TG and DTA. The PAM-AMPS aqueous two-phase dispersion was characterized by TEM and its stability was investigated. The results demonstrated that amorphous copolymer PAM-AMPS showed good thermal stability. The PAM-AMPS aqueous two-phase dispersion displayed excellent stability with an instability coefficient（ TSI） of not more than 0. 4. The PAM-AMPS aqueous dispersion was composed of spherical or ellipsoidal droplets with an average particles size about 186. 2 nm. The rheological tests showed that when the mass fraction of PAM-AMPS aqueous two-phase dispersion（ based on the total mass of the system） was increased from 0. 2% to 1%,the viscosity of the mixed system containing 2 ×10^4 mg/L sodium chloride was increased from 8. 22 Pa·s to 60. 74 Pa·s. While the concentration of sodium chloride was increased from 1 × 10^4 mg/L to 5 × 10^4 mg/L,the viscosity of the mixed systemcontaining 0. 2% PAM-AMPS aqueous two-phase dispersion was decreased from 10. 80 Pa·s to 5. 94 Pa· s. Therefore,the PAM-AMPS aqueous two-phase dispersion had excellent thickening and saltresistant properties.

关 键 词：双水相聚合 阴离子聚丙烯酰胺 表征 稳定性 油田化学品与油品添加剂 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]