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机构地区:[1]陕西科技大学轻化工助剂化学与技术教育部重点实验室,陕西西安710021
出 处:《现代化工》2010年第5期51-54,共4页Modern Chemical Industry
基 金:国家自然科学基金项目(20876093;50973057);陕西省"13115"重点项目(2007E118)
摘 要:以丙烯酰胺(AM)、甲基丙烯酸二甲氨基乙酯(DM)为共聚单体,通过在浓度较低的硫酸铵溶液(PS)中引入自制聚电解质分散剂(PDMC)和水溶性高分子稳定剂(PAB)获得了稳定的阳离子聚丙烯酰胺水分散液(CPAM),该CPAM表观黏度(η)为525 mPa.s,特性黏数([η])为650 mL/g,储存稳定期达到90 d以上,并得出了最佳合成条件为w(PAB)(占反应单体)=13%、w(PDMC)(占水分散体系)=33%、[η](PDMC)=35 mL/g、w(PS)(占水分散体系)=3%。分散稳定剂对CPAM的稳定性影响很大,且随着w(CPAM)的降低,CPAM水分散体系假塑性逐渐减弱,并表现出先迅速溶胀直至凝胶而后逐渐溶解的性质。A new stable cationic polyacrylamide water dispersed (CPAM) is prepared by the copolymerization of acrylamide(AM) and dimethylaminoethylacrylate (DM) with polyelectrolyte as dispersant ( PDMC ) and water soluble polymer as stabilizer(PAB). The apparent viscosity(η) and intrinsic viscosity( [ η] ) of the CPAM are respectively 525 mPa · s and 650 mL/g,and it can also be stored for more than 90 days. The optimal conditions are as follows:w(PAB) ( ratio to momomer) = 13 %, w (PDMC) ( to the whole water dispersed) = 33 % , [ η] ( PDMC ) = 35 mL/g, w ( PS ) ( to the whole water dispersed) = 3 %. The dispersion stabilizer has a great effect on the stability of CPAM, and as w (CPAM) reduces,the pseudoplastic of CPAM water dispersed is weaken,while the CPAM has a great change from water dispersed to a gelatin through a violent swelling and then it is dissolved gradually.
关 键 词:水包水乳液 阳离子聚丙烯酰胺 水分散体系 流变行为
分 类 号:TQ316.33[化学工程—高聚物工业]
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