含氟丙烯酰胺共聚物的合成及性能  

Synthesis and Properties of Fluorinated Acrylamide Copolymer

作　　者：赵庆美[1,2] 赵林[2] 汤琪[1] 马超[2] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023 [2]长江大学石油工程学院,湖北武汉430100

出　　处：《高分子材料科学与工程》2017年第6期30-36,共7页Polymer Materials Science & Engineering

基　　金：国家重大科技专项(2011E-2407);中国石油科技创新基金(2013D-5006-0207);长江大学校青年基金(2016cqn24);湖北省教育厅基金(2017zqm)

摘　　要：为制备性能较好的疏水缔合聚合物,以1H,1H,2H,2H-十七氟癸烷丙烯酸酯(HFA)为疏水单体,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为水溶性单体,采用胶束聚合法合成了含氟丙烯酰胺共聚物(FPAM)。使用红外、荧光、扫描电镜等方法对FPAM结构进行表征,研究了FPAM的耐温、抗盐及抗剪切性能。结果表明,聚合产物结构与疏水单体加量有关,在聚合体系中加入含氟疏水单体后,聚合产物的相对分子质量降低;FPAM中HFA单体结构单元含量先随HFA加量的增加而增大,由于含氟疏水单体的空间位阻效应,当HFA质量分数大于0.4%之后变化趋势变缓。FPAM聚合物中含有HFA强疏水性单体结构单元,在水溶液中会发生疏水缔合作用,到达一定浓度后会形成超分子聚集体,FPAM的临界缔合浓度为300~400mg/L,与相对分子质量较高的丙烯酰胺-2-丙烯酰胺基-2-甲基丙磺酸共聚物相比,含氟疏水缔合聚合物FPAM具有更强的增黏能力和更好的耐温、抗盐及抗剪切性能,可望用于油气开采领域。A fluorinated hydrophobic association polyacrylamide （FPAM）, was successfully synthesized with acrylamide （AM）, 2-acrylamide-2-methyl propanesulfonic acid （AMPS） and 1H,1H,2H,2H-heptadecafluorodecyl acrylate （HFA） by radical micellar polymerization, which was characterized by infrared spectrometric analyzer （IR）, fluorescence spectroscopy （FS） and scanning electron microscopy （SEM）. The temperature tolerance, salts resistance and shearing resistance were studied in detail. The results show that the structure of FPAM is influenced by the dosage of HFA, and the relative molecular weight decreases when HFA is added into the polymerization system. In the initial stage, the content of constitutional units HFA in FPAM obviously increases with increasing of the HFA content, and the trend is slowing down when the mass fraction of HFA is over 0.4%, that is due to the steric hindrance effect of HFA. The strong hydrophobic properties of constitutional unit HFA lead to the hydrophobic association in the aqueous solution and form the supramolecular aggregates when reaching a certain concentration. The results also show that the critical association concentration （CAC） of FPAM is 300～400 mg/L. Compared with copolymer AM-AMPS, FPAM shows better properties such as viscosity-promoting, salt resistance, shearing resistance and temperature tolerance although the relative molecular weight of FPAM is lower than that of the binary copolymer. The excellent performance of FPAM may ensure it to be the potential candidate in oil and gas field.

关 键 词：疏水缔合聚合物 1H 1H 2H 2H-十七氟癸烷丙烯酸酯 含氟聚合物 溶液性能 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]