Viscosity enhancement of complexed solutions formed through the complexation of nonionic water-soluble polymers with chemically complementary structures in aqueous media
Viscosity enhancement of complexed solutions formed through the complexation of nonionic water-soluble polymers with chemically complementary structures in aqueous media
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DOI：
10.1002/(sici)1099-0488(20000415)38:8
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发表时间：
2000-04
期刊：
影响因子：
--
通讯作者：
Y. Dan;Sanyu Chen;Yanfen Zhang;F. Xiang
中科院分区：
文献类型：
--
作者：
Y. Dan;Sanyu Chen;Yanfen Zhang;F. Xiang
具有化学互补结构的聚合物在水介质中的大分子间络合是改性聚合物溶液，特别是提高溶液粘度的一种新方法。本文研究了几种非离子水溶性聚合物对--聚丙烯酸(PAA)与聚丙烯酰胺(PAM)、PAM与聚环氧乙烷(PEO)、PAA与聚乙烯醇(PVA)以及PEO与PVA氢键络合形成的络合溶液，并用视觉分光光度法和粘度法研究了络合溶液的增粘作用。通过比较不同络合溶液的增粘因子R，考察了聚合物浓度、聚合物相对分子质量和溶液pH值对大分子间相互作用的影响。结果表明，PAA/PAM复合溶液的粘度远高于其各组分的粘度，而PAM/PEO和PAA/PVA复合溶液的粘度介于其各组分的粘度之间，但高于按两种聚合物溶液共混规律计算的理论值。这些结果表明，在络合溶液中，具有化学互补结构的大分子之间存在着相互作用，尽管不同的络合体系的相互作用是不同的。正是这种相互作用导致了聚合物的缔合，从而明显提高了溶液的粘度和聚合物溶液的抗剪切能力。#2000 John Wiley&Sons，Inc.J Polym Sci B：Polym Phys 38：1069-1077,2000
The intermacromolecular complexation of polymers with chemically complementary structures in aqueous media is a new approach to modifying polymer solutions, especially to enhance solution viscosity. In this study, complexed solutions formed through the hydrogen-bonding complexation of several nonionic water-soluble polymer pairs—poly(acrylic acid) (PAA) with polyacrylamide (PAM), PAM with poly(ethylene oxide) (PEO), PAA with poly(vinyl alcohol) (PVA), and PEO with PVA—were prepared, and the viscosity enhancement of the complexed solutions were studied with vision spectrophotometry and viscometry. The effects of the polymer concentration, polymer molecular weight, and pH value of the polymer solution on the intermacromolecular interactions were investigated through a comparison of the viscosity enhancement factor R of different complexed solutions. The results show that the viscosity of the PAA/PAM complexed solution is much higher than that of its constituents, whereas that of the PAM/PEO and the PAA/PVA complexed solutions are between the viscosities of their constituents but are higher than the theory values calculated from the blending rule of two polymer solutions. These results indicate that in the complexed solutions there exist interactions between the macromolecules with chemically complementary structures, although the interactions are quite different for the different complexed systems. It is the interactions that lead to an association of the polymers and, hence, an obvious enhancement in the solution viscosity and the resistance of the polymer solutions to shearing. © 2000 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 38: 1069–1077, 2000