抗盐丙烯酰胺非线型共聚物的合成及溶液特性  

Synthesis and Solution Properties of Salt Resistant Acrylamide Non-Linear Copolymers

作　　者：王伟[1] 张杰[1] 赵凤祥 陈瑜芳[1] 王晓燕[1] 杨怀军[1] 严曦[1] WANG Wei;ZHANG Jie;ZHAO Fengxiang;CHEN Yufang;WANG Xiaoyan;YANG Huaijun;YAN Xi(Oil Production Technology Institute, Dagang Oilfield, CNPC, Tianjin 300280, China;The Fifth Oil Production Plant, Dagang Oilfield, CNPC, Tianjin 300280, China)

机构地区：[1]中国石油大港油田采油工艺研究院,天津300280 [2]中国石油大港油田第五采油厂,天津300280

出　　处：《石油学报（石油加工）》2021年第2期416-421,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家油气重大专项基金项目(2016ZX05010-004-004)资助。

摘　　要：实验室合成了长链大单体4-乙烯基辛烷基酚聚氧乙烯(14)醚(SMA),并以丙烯酰胺(AM)为主要原料,引入单体SMA、4-乙烯基联苯(VB)和2-丙烯酰胺基-2-甲基丙磺酸(AMPS),采用水溶液自由基胶束聚合法合成了抗盐丙烯酰胺非线型共聚物(PPSA)。采用核磁共振氢谱(1H-NMR)和红外光谱(FT-IR)对PPSA进行了表征。考察了聚合物质量浓度、NaCl含量和温度对共聚物溶液表观黏度的影响。结果表明:PPSA在NaCl水溶液中显示出优异的盐增稠和热增稠效应;当PPSA质量浓度为2000 mg/L时,在53℃下质量分数为10%NaCl水溶液中表观黏度达到1210 mPa·s,显示了优异的增黏和抗盐性能;且在80℃下质量分数为10%NaCl水溶液中的表观黏度仍达到100.3 mPa·s,显示了良好的耐温性;扫描电镜(SEM)照片显示PPSA在高浓度NaCl水溶液中形成了超分子网络结构。A long chain macromonomer allyl-capped octylphenoxy poly(ethylene oxide)(degree of polymerization 14)(SMA)was synthesized in the laboratory.The salt resistant acrylamide copolymers(PPSA)were synthesized by acrylamide(AM),SMA,4-vinylbiphenyl(VB)and 2-acrylamido-2-methylpropanesulfonic acid(AMPS)with the micelle free radical copolymerization technique.Then,the synthesized copolymers were characterized with 1H-NMR and FT-IR.Effects of polymer mass concentration,NaCl content and temperature on the apparent viscosity of copolymer solution were investigated.Experimental results indicate that the copolymers can exhibit good salt-thickening and heat-thickening properties.At the temperature of 53℃and PPSA mass concentration of 2000 mg/L,the liquid apparent viscosity in mass fraction of 10%NaCl solution can be up to 1210 mPa·s This indicates that the synthesized copolymers demonstrate excellent thickening and salt resistance properties.At the temperature of 80℃,liquid apparent viscosity with mass fraction of 10%NaCl solution is still 100.3 mPa·s,which suggest the copolymers have good heat resistance.Scanning electron microscope(SEM)results show that supramolecular network structure has been formed for PPSA in high concentration brine solution.

关 键 词：丙烯酰胺 耐温 抗盐 疏水缔合 超分子网络 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]