丙烯酰胺/丁基苯乙烯疏水缔合共聚物的溶液性能  

Solution properties of hydrophobically associating acrylamide-based copolymer with butyl styrene

作　　者：钟传蓉[1] 叶林[2] 黄荣华[2] 代华[2] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《化工学报》2006年第11期2766-2771,共6页CIESC Journal

基　　金：国家重点基础研究发展计划项目(G1999022502);成都理工大学研究基金项目(2004YG01).~~

摘　　要：采用自由基胶束聚合法合成了丙烯酰胺(AM)/丁基苯乙烯(BS)疏水缔合水溶性共聚物(PSAM).凝胶渗透色谱(GPC)测试结果显示,PSAM的重均分子量为1·6868×105,环境扫描电镜(ESEM)照片显示,PSAM在水溶液中形成了疏水缔合网络结构,结果表明,PSAM的增黏能力主要依赖于疏水结构单元的分子间疏水缔合作用.PSAM溶液性能的研究结果表明,溶液质量浓度超过0·1g·dl-1时,共聚物具有优良的增黏、耐盐及耐温性能,在80℃时显示良好的抗老化性能;PSAM亚浓溶液为假塑性流体,具有良好的触变性,低剪切速率下在最初一段时间内呈现剪切增稠性质.The hydrophobically associating water soluble copolymer （PSAM） of acryl amide with butyl styrene （BS） was synthesized by the micellar free radical copolymerization technique. GPC measurement showed that the weight average molecular weight of PSAM was 1. 6868 × 105 and environmental scanning electron microscope （ESEM） images of hydrophobically associating network-structures of PSAM in aqueous solution were obtained, indicating that the viscosification performance of PSAM was dependent on the intermolecular hydrophobic association. The study on the solution properties of PSAM showed that when the copolymer concentration was higher than 0.1 g·dl^-1, the copolymer exhibited good viscosification property, salt-thickening, temperature-thickening, pseudoplastic behavior, thixotropy and shear-thickening upon application of a low shear rate in the initial period of time. After ageing for 90 d at 80℃, the apparent viscosities of 0.2 g · dl^-1 PSAM in 0.137 mol·L^-1 NaCl solution was 53.8 mPa· s and the retention ratio of apparent viscosity was 49.2%, showing good anti ageing property of the polymer due to the incorporation of BS into the polymer.

关 键 词：丙烯酰胺 丁基苯乙烯 疏水缔合 溶液性能 环境扫描电镜 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]