丁基苯乙烯疏水改性阳离子型丙烯酰胺共聚物的合成  

SYNTHESIS OF HYDROPHOBICAL BUTYL STYRENE-MODIFIED CATIONIC ACRYLAMIDE COPOLYMER

作　　者：钟传蓉[1] 罗平亚[1] 胡晓斌[2] 徐敏[2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川新都610500 [2]成都理工大学材料与化学化工学院,四川成都610059

出　　处：《石油学报（石油加工）》2007年第5期49-54,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展规划"973"项目(2005CB221302);中国博士后科学基金(20060391033);成都理工大学研究基金(2004YG01)资助

摘　　要：用自由基胶束聚合法合成了具有良好增黏能力的丙烯酰胺（AM）/丁基苯乙烯（BST）/二甲基二烯丙基氯化铵（DMDAAC）疏水缔合水溶性共聚物PBAD,考察了反应条件对共聚产物表观黏度的影响。适宜的聚合反应条件为：DMDAAC、BST和引发剂加量相对于单体总量的摩尔分数分别为10%、1.0%和0.14%,总单体和表面活性剂CTAB在水溶液中的质量分数分别为20%和3.0%,反应温度50℃,pH值为6～7,反应时间12h。采用以上反应条件得到PBAD的临界缔合质量浓度1g/l和2g/l的水溶液表观黏度分别为18和69mPa·s。采用UV、FT-IR、1HNMR和DSC等手段表征了共聚物的分子结构。DSC结果表明,疏水链段以微嵌段结构的形式分布于PBAD分子中。这种微嵌段结构有利于聚合物分子间的疏水缔合。The water-soluble copolymers （PBAD） with acrylamide, butyl styrene （BST） and dimethyldiallyammonium chloride （DMDAAC） were synthesized by the micellar free radical copolymerization technique, which have good viscosification effect due to the incorporation of the hydrophobic phenyl group from BST into the molecules. The influence of reaction conditions on the apparent viscosity of PBAD aqueous solution was studied, and the suitable reaction parameters were obtained, in which the molar fractions of DMDAAC, BST and initiator, relative to the total monomer, the mass fraction of the total monomer and surfactant in water, reaction temperature, pH value and reaction time were 10%, 1.0%, 0.14%, 20%, 3.0%, 50℃, 6-7 and 12 h, respectively. The polymer aqueous solutions synthesized under the above reaction conditions with the PBAD critical association mass concentrations of 1 g/1 and 2 g/1 possessed the apparent viscosities of 18 and 69 mPa. s, respectively. The synthesized products were characterized by means of UV, FT-IR, ^1H NMR and DSC. The DSC result showed that the hydrophobic units distributed in the polymer molecules in the form of microblock structure, which was favourable to the intermolecular hydrophobic association.

关 键 词：丁基苯乙烯 自由基胶柬聚合 疏水缔合 嵌段结构 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]