检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:孟庆亮[1] 刘少杰[1,2] 崔士红[1] 谭业邦[1]
机构地区:[1]山东大学化学与化工学院教育部特种功能聚集体材料重点实验室,山东济南250100 [2]山东大学国家胶体材料工程中心,山东济南250100
出 处:《石油化工》2013年第10期1104-1110,共7页Petrochemical Technology
基 金:国家科技重大专项(2011ZX05024-004-08)
摘 要:以过硫酸铵(APS)为引发剂,以丙烯酸(AA)、丙烯酸羟丙酯(HPA)和2-丙烯酰胺基-2-甲基内磺酸(AMPS)为单体,通过水溶液自由基聚合制备了AA/HPA/AMPs钠盐三元共聚物,用FTIR、^1H NMR和静态激光光散射对共聚物的结构及其相对分子质量进行了表征。正交实验结果表明,在n(AA):n(HPA):n(AMPS)=3:1:1.6、W(APS)=15%、w(异丙醇):15%、80℃下合成的聚合物(PAPA-10)对TiO2的分散效果较好。同时考察了悬浮液pH和聚合物剂量对分散TiO2的影响,实验结果表明,PAPA-10具有较好的抗酸碱能力,在pH=4—13时TiO,悬浮率均在90%左右;PAPA-10剂量为0.010g时TiO2悬浮率为92.8%。聚合物间的静电斥力及空间位阻作用使TiO,颗粒间的团聚现象减弱,TiO,颗粒的粒径减小,悬浮率提高。Acrylic acid(AA)-hydroxypropyl acrylate(HPA)-2-acrylamido-2-methyl propane sulfonic acid(AMPS) terpolymers were synthesized by the radical copolymerization ofAA, HPA and AMPS in aqueous solution using ammonium persulfate(APS) as the initiator. The structures and relative molecular mass of the copolymers were characterized by means of FTIR, 1H NMR and static light scattering. The results of orthogonal tests showed that the copolymer(PAPA-10) prepared under the polymerization conditions ofn(AA) : n(HPA) : n(AMPS)3 : 1 : 1.6, w(APS) 15%, w(isopropanol) 15% and 80 ~C had a better effect on TiO2 dispersion. The effects of pH and copolymer dosage on TiO2 dispersion in the copolymer solution were investigated. The results indicated that the terpolymer PAPA-10 had good antiacid and antibase properties, and the suspension rate of TiO2 in its solution with pH 4-13 was around 90%; the suspension rate of TiO2was 92.8% when the PAPA-10 dosage was 0.010 g. The electrostatic repulsion and steric effect between the copolymer molecules led to weakening of the TiO2 particle agglomeration, so the copolymers reduced the particle size of TiO2 and increased its suspension rate.
关 键 词:丙烯酸 丙烯酸羟丙酯 2-丙烯酰胺基-2-甲基丙磺酸 水溶性共聚物 分散剂 二氧化钛 分散性能
分 类 号:TQ314.24[化学工程—高聚物工业]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.38