Zeta Potential as an Analytical Tool for Graft Copolymers and for Polymer Surfaces
作者:
Josef Schurz,
Gayyur Erk,
Walter Schempp,
Volker Ribitsch,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1990)
卷期:
Volume 27,
issue 13-14
页码: 1673-1692
ISSN:0022-233X
年代: 1990
DOI:10.1080/00222339009351509
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Polymers with electrically charged groups exhibit a zeta potential when in contact with electrolyte solutions in water. This can be measured with solid polymers as fibers, foils, or granulates. The method of streaming potential/streaming current allows the determination of the carboxyl content of cellulose grafted with poly-(acrylic acid). Since zeta-potential measurements concern the surface of the sample, the method yields information on the type of grafting; i.e., whether it takes place mainly on the surface or throughout the bulk. By measuring the pH dependence of the zeta potential it is possible to obtain the pKvalue of the charged groups. The significance of zeta potential as an analytical tool is emphasized.
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