CAJ | 학술논문

采用水溶液自由基聚合法合成了新型的丙烯酰胺(AM)/4-乙烯苄基辛烷基酚聚氧乙烯(18)醚(VE),2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)接枝共聚物(PAE),以解决驱油聚合物抗高盐性能差的难题.通过傅里叶变换红外(FT-IR)光谱和核磁共振氢谱(~1H NMR)对PAE的分子结构进行了表征.PAE盐溶液显示了两次盐增稠和热增稠效应.对于VE摩尔分数为0.93%的PAE,当其质最浓度为2.0 g·L~(-1)时,于30℃在5.0和90.0 g·L~(-1)NaC1 溶液中的表观粘度分别为1167.0和338.0 mPa·s显示了优异的增粘和抗盐能力;并且于85℃在5.0 g·L~(-1)NaC1溶液中的表观粘度仍达685.0 mPa·s,显示了良好的耐温性能.PAE还具有较好的表、界面活性.扫描电镜(SEM)照片显示,PAE在纯水中形成了独特的缔合结构,而且在盐水溶液中也形成了连续的微结构,这表明在水中伸展的分子链在盐水中的构象仍然较伸展.
채용수용액자유기취합법합성료신형적병희선알(AM)/4-을희변기신완기분취양을희(18)미(VE),2-병희선알기-2-갑기병광산납(NaAMPS)접지공취물(PAE),이해결구유취합물항고염성능차적난제.통과부리협변환홍외(FT-IR)광보화핵자공진경보(~1H NMR)대PAE적분자결구진행료표정.PAE염용액현시료량차염증주화열증주효응.대우VE마이분수위0.93%적PAE,당기질최농도위2.0 g·L~(-1)시,우30℃재5.0화90.0 g·L~(-1)NaC1 용액중적표관점도분별위1167.0화338.0 mPa·s현시료우이적증점화항염능력;병차우85℃재5.0 g·L~(-1)NaC1용액중적표관점도잉체685.0 mPa·s,현시료량호적내온성능.PAE환구유교호적표、계면활성.소묘전경(SEM)조편현시,PAE재순수중형성료독특적체합결구,이차재염수용액중야형성료련속적미결구,저표명재수중신전적분자련재염수중적구상잉연교신전.
Novel branched acrylamide-based copolymers (PAE) were synthesized by an aqueous free radical copolymerization technique using acrylamide (AM), sodium 2-acrylamido-2-methylpropane sulphonate (NaAMPS) and p-vinylbenzyl-terminated octylphenoxy poly(ethylene oxide) (VE, polymerization number 18) to improve the poor salt resistance of the oil-flooding polymer at high salt concentrations. The PAE polymer was characterized with Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance (~1H-NMR). The PAE brine solutions exhibited salt-thickening twice and heat-thickening twice over the ranges of NaCl concentration and temperature. For 2.0 g·L~(-1) PAE containing 0.93% (molar fraction) VE, the apparent viscosities of 5.0 and 90.0 g·L~(-1) NaCl solutions were 1167.0 and 338.0 mPa · s at 30℃, respectively. This showed the excellent thickening property and salt resistance of the polymer. The apparent viscosity of the 5.0 g·L~(-1) NaCl solution was still up to 685 mPa·s at 85 ℃, which exhibited good heat resistance of the polymer. Moreover, the polymer showed good surfactant and interfacial activities. The scanning electron microscope (SEM) morphologies showed that unique associated structures were formed for PAE in water and continuous network structures were still formed in the brine solution of PAE. Results indicated that the extense polymer chains in water were still able to expand comparatively in the brine solution.