WATER-SOLUBLE COPOLYMERS .56. STRUCTURE AND SOLVATION EFFECTS OF POLYAMPHOLYTES IN DRAG REDUCTION

被引:53
作者
MUMICK, PS [1 ]
WELCH, PM [1 ]
SALAZAR, LC [1 ]
MCCORMICK, CL [1 ]
机构
[1] UNIV SO MISSISSIPPI,DEPT POLYMER SCI,SOUTHERN STN,HATTIESBURG,MS 39406
关键词
D O I
10.1021/ma00080a003
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Water-soluble polyampholytes based on acrylamide (AM), sodium 2-acrylamido-2-methylpropanesulfonate (NaAMPS), (2-acrylamido-2-methylpropyl)trimethylammonium chloride (AMPTAC), sodium 3-acrylamido-3-methylbutanoate (NaAMB),and 3-((2-acrylamido-2-methylpropyl)dimethylammonio)-1-propanesulfonate (AMPDAPS) have been synthesized and characterized. The molecular weights of the polymers range from 1.4 X 10(6) to 21.5 x 10(6). Almost all the polyampholytes showed higher intrinsic viscosities at higher solvent ionic strength. The drag reduction behavior of high and low charge density polyampholytes and polybetaines was examined with a rotating-disk rheometer. All the polymers exhibited higher drag reduction at increased solvent ionic strength. The poly(sulfobetaines) (copolymers of AM and AMPDAPS) were found to be the most efficient drag reducers, and the high charge density polyampholyte (copolymer containing 50 mol % each of AMPTAC and NaAMPS) was the least efficient. Experimental data indicate that theoretical models of drag reduction should include parameters for polymer-solvent interactions and molecular associations.
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页码:323 / 331
页数:9
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